Automatic Transmission Servicing - Except Allison: Removal & Installation GMC Yukon Denali

REMOVAL & INSTALLATION

Removal

Note. Tools required: Pump and Valve Body Alignment Pin Set (J-25025-B), and Transmission Assembly Lubricant (J-36850).

1. Remove the control valve body. See «VALVE BODY & PRESSURE SWITCH»(ref-138423-S04436530172002041300000).
2. Remove the accumulator cover bolts. (Scheme 87)
3. Remove the 1-2 accumulator cover and pin, piston and springs. Remove the 1-2 accumulator piston spring. Remove the 1-2 accumulator piston and the oil seal ring. (Scheme 88)
4. Remove the oil pass cover bolt. Remove the oil pass cover. (Scheme 89)
5. Remove the spacer plate. Remove the spacer plate gaskets. (Scheme 90)
6. Remove the 3-4 accumulator spring. Remove the piston oil seal ring. Remove the 3-4 accumulator piston and the pin. (Scheme 91) Inspect the accumulator assembly.

Installation

1. Install the 3-4 accumulator pin into the transmission case. Install the 3-4 accumulator piston onto the pin. The piston legs must face the valve body. Install the 3-4 accumulator piston oil seal ring. Install the 3-4 accumulator piston spring. (Scheme 91) Install the alignment pin to the transmission case.
2. Install the case gasket and the valve body gasket to the spacer plate. The case gasket is identified by a "C". The valve body gasket is identified by a "V". Use assembly lubricant to retain the gaskets to the spacer plate. Install the spacer plate and the gaskets to the transmission case. (Scheme 90)
3. Install the oil pass cover and the oil pass cover bolts. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
4. Install the 1-2 accumulator piston with the piston legs facing toward the case. (Scheme 88) Install the oil seal ring to the accumulator cover.
5. Install the 1-2 accumulator spring onto the piston. Install the 1-2 accumulator cover and the cover bolts. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
6. Remove the alignment pin from the transmission case. Install the control valve body. See «VALVE BODY & PRESSURE SWITCH»(ref-138423-S04436530172002041300000).

Scheme 87

Scheme 88

Scheme 89

Scheme 90

Scheme 91

1. Raise and support the vehicle. Remove the oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION. Remove the Transmission Fluid Pressure (TFP) manual valve position switch bolts and the TFP valve position switch. The 5 O-rings should remain attached to the TFP valve position switch.
2. Remove the control valve body assembly bolts. Remove the fluid transmission fluid level indicator stop bracket. Remove the lube oil pipe retainer and the clamp. Remove the lube oil pipe.
3. Remove the manual shaft detent spring assembly. Remove the control valve body assembly (44) which includes the accumulator assembly. (Scheme 92)
4. Remove the 3rd and 4th clutch accumulator housing bolts (53). Remove the 3rd and 4th clutch accumulator housing (51). Remove the accumulator housing gasket (47). (Scheme 92)
5. The accumulator housing gasket may be stuck to the spacer plate (46). Remove the 3rd clutch accumulator piston spring (50). Remove the 4th clutch accumulator piston spring (49). (Scheme 92)
6. Remove the control valve body spacer plate (46). Remove the control valve body assembly to spacer plate gasket (45) from the spacer plate (46). (Scheme 93)
7. Inspect all components for wear or damage. (Scheme 94) Replace all worn or damaged parts.

1. Reassemble accumulator assembly as shown. (Scheme 94)
2. Install the guide pin into the control valve body bolt hole where the manual shaft detent roller and spring assembly is mounted. Install the control valve body gasket (45). Install the control valve body spacer plate (46). (Scheme 93)
3. Install the 3rd and 4th clutch accumulator housing gasket (47). Install the 3rd clutch accumulator piston spring (50). This spring is the longer of the 2 springs. Install the 4th clutch accumulator piston spring (49). (Scheme 93)
4. Install the 3rd and 4th clutch accumulator housing assembly (51) onto the control valve body assembly (44). Install the 6 accumulator housing bolts (53). Start the bolts finger tight and work towards the opposite end.
5. Tighten the accumulator housing bolts sequentially. (Scheme 95) Tighten the accumulator housing bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000). Remove the guide pin.
6. Install the control valve body gasket. Install the control valve body assembly. See «VALVE BODY & PRESSURE SWITCH»(ref-138423-S04436530172002041300000). Attach the manual valve to the detent lever while installing the control valve body assembly.
7. Install the transmission fluid pressure manual valve position switch. Install the transmission fluid pressure manual valve position switch bolts finger tight, then torque the bolts sequentially to specification. (Scheme 97)and «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
8. Install the manual shaft detent roller and spring assembly (3) and bolts (2 and 4). Install the 2 wiring harness clips (1) and bolts (2). Install the wiring harness clip (1) and bolts (2). (Scheme 96)
9. Install the lube oil pipe (5) with the short end into the control valve body. Install the lube oil pipe retainer (7) and the bolt (6). Install the remaining control valve body bolts. (Scheme 96) Tighten the bolts sequentially to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000). Install oil pan. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 92

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

Remove the grille assembly. Remove the nuts securing the 2 cooler lines to the oil cooler. Remove the 4 bolts securing the auxiliary oil cooler to the radiator support. Remove the auxiliary oil cooler. (Scheme 98)

Install the 4 bolts securing the oil cooler to the radiator support and tighten the bolts to specification. See TORQUE SPECIFICATIONS. Install the nuts securing the 2 oil cooler lines to the auxiliary oil cooler. (Scheme 98) Tighten to specification. See TORQUE SPECIFICATIONS. Reinstall the grille assembly.

Scheme 98

1. Remove the transmission oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
2. Remove the 1-2 accumulator if necessary. See «ACCUMULATOR ASSEMBLY (4L60-E)»(ref-138423-S37459226902002041300000).
3. Disconnect the internal wiring harness electrical connectors from the following components: Transmission fluid pressure switch. (Scheme 99) 1-2 shift control solenoid. 2-3 shift control solenoid. Pressure control solenoid. 3-2 shift control solenoid. TCC PWM solenoid.
4. Remove the pressure control solenoid retainer. Remove the pressure control solenoid. (Scheme 100)
5. Remove the 1-2 and 2-3 shift control solenoid retainers. Remove the 1-2 and 2-3 shift control solenoids. (Scheme 101)
6. Remove the 3-2 control solenoid retainer. Remove the 3-2 control solenoid. (Scheme 101)

1. Install the 3-2 control solenoid. Install the 3-2 control solenoid retainer. Install the 1-2 and 2-3 shift control solenoids. (Scheme 101)
2. Install the 1-2 and 2-3 shift control solenoid retainers. Install the pressure control solenoid. Ensure the electrical tabs are facing outboard. (Scheme 101)
3. Install the pressure control solenoid retainer and retaining bolt and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
4. Connect the internal wiring harness electrical connectors to the following components: Transmission fluid pressure switch. (Scheme 99) 1-2 shift control solenoid. 2-3 shift control solenoid. Pressure control solenoid. TCC PWM solenoid. 3-2 control solenoid.
5. Install the 1-2 accumulator. See «ACCUMULATOR ASSEMBLY (4L60-E)»(ref-138423-S37459226902002041300000).
6. Install the transmission oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
7. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 99

Scheme 100

Scheme 101

1. Remove the oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
2. Remove the Transmission Fluid Pressure (TFP) manual valve position switch bolts and switch. (Scheme 102) Remove the control valve assembly bolts and the fluid level indicator stop bracket.
3. Remove the lube oil pipe retainer (7) and the clamp. Remove the lube oil pipe (5). Remove the manual shaft detent spring assembly (3). (Scheme 96)
4. Remove the control valve assembly (2) which includes the following: Accumulator housing assembly. Control valve assembly-to-spacer plate gasket. Spacer plate. Accumulator gasket.
5. Remove the manual valve (16) from the control valve body to prevent any damage. Inspect the manual valve for nicks and burrs. (Scheme 103)
6. Remove the spacer plate to case gasket from the case. The gasket may stick to the spacer plate. Remove the PWM screen from the case passages. Inspect the PWM screen for debris and damage.
7. Remove the 8 checkballs (9 checkballs for some transmissions).

1. Install the 8 checkballs (9 checkballs for some transmissions) into the control valve body. The checkball marked as number 2 is used on RCP, RDP, ZJP and ZLP models only. (Scheme 104)
2. To hold the checkballs in place, use assembly lubricant. Install the PWM screen into the control valve body.
3. Install the manual valve (16) into the control valve body. Install the control valve body gasket. Install the control valve body assembly. (Scheme 103)
4. Attach the manual valve to the detent lever while installing the control valve body assembly. Install the transmission fluid pressure manual valve position switch.
5. Install the transmission fluid pressure manual valve position switch bolts finger tight. Torque the bolts sequentially to specification. (Scheme 102)and «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
6. Install the manual shaft detent roller and spring assembly (3) and bolts (2 and 4). Install the 2 wiring harness clips (1) and bolts (2). Install the wiring harness clip (1) and bolts (2). Install the lube oil pipe (5) with the short end into the control valve body. Install the lube oil pipe retainer (7) and the bolt (6). (Scheme 96)
7. Install the remaining control valve body bolts and tighten the bolts sequentially to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).

TFP Position Switch Bolt Torque Sequence & Wire Harness Installation. Scheme 102

Scheme 103

Scheme 104

Raise and support the vehicle. Remove the propeller shaft. Remove the rear extension oil seal. (Scheme 105)

Install the new seal using seal installer and a soft faced mallet. (Scheme 106) Install the propeller shaft. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See LUBRICATION

Scheme 105

Scheme 106

1. Remove the transmission fluid level indicator from the fluid fill tube. Remove the bolt securing the transmission fluid fill tube bracket to the transmission housing. Remove the bolt securing the transmission fluid fill tube bracket to the transmission.
2. Raise and support the vehicle. Remove any dirt from the transmission where the fluid fill tube enters the transmission case. (Scheme 107) Remove the transmission fluid fill tube from the transmission.
3. Pull the tube upward from the transmission. Remove the transmission fill tube seal. Clean the metal parts using solvent. DO NOT allow the solvent to enter the transmission. Dry the parts using compressed air.

1. Install a new filler tube seal into the transmission case. Install the filler tube into the seal. (Scheme 107)
2. Install the bolt securing the filler tube bracket to the transmission and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
3. Install the bolt securing the filler tube bracket to the engine and tighten to specification See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
4. Lower the vehicle. Install the transmission fluid level indicator. Adjust fluid level as necessary. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 107

1. Remove the transmission fluid level indicator from the transmission fluid level indicator tube. For the gasoline engine, remove the stud securing the transmission fluid fill tube bracket to the transmission. On diesel models, remove the transmission fluid fill tube bracket and ground wire to the transmission.
2. On all models, raise and support the vehicle. Remove any dirt from the transmission where the fluid fill tube enters the transmission case. Place a drain pan under the transmission.
3. Remove the transmission fluid fill tube from the transmission. (Scheme 108) Pull the tube upward from the transmission. Remove the transmission fill tube seal. (Scheme 109)

1. Install a new transmission fluid level indicator tube seal into the transmission case. (Scheme 109) Install the transmission fluid level indicator tube into the seal. (Scheme 108)
2. On gasoline models, install the stud securing the transmission fluid level indicator tube bracket to the transmission and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
3. On diesel models, install the bolt and nut that secures the transmission fluid level indicator tube bracket and ground wire to the transmission. Tighten the bolt and the nut to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
4. On all models, lower the vehicle. Install the transmission fluid level indicator. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 108

Scheme 109

Raise and support the vehicle. Remove the 2 bolts securing the transmission heat shield to the cross member. Remove the transmission heat shield from the cross member. (Scheme 110)

Install the transmission heat shield to the cross member. Install the 2 bolts securing the transmission heat shield to the cross member. Tighten the bolts to specification. See TORQUE SPECIFICATIONS . Lower the vehicle.

Scheme 110

1. Lift the vehicle. Remove the oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
2. Remove the 6 forward servo cover bolts, cover and gasket.
3. Remove the following parts: Forward servo piston pin (5). O-ring seal (4). Servo piston (3). Retainer (2). Piston spring (1). (Scheme 111)

1. Install the following parts: Piston spring (1). Retainer (2). Servo piston (3). O-ring seal (4). Forward servo piston pin (5). (Scheme 111)
2. Install the 6 forward servo gasket, cover, the 6 bolts and tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
3. Install the oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 111

1. Raise and support the vehicle. On Escalade, remove the retainer clips, the bolts and the brackets that secure the transmission cooler lines to the engine. On all other models, pull the plastic cap back from the quick connect fitting.
2. Remove the cooling lines from the clips. Remove the 2 retaining rings securing the 2 cooling lines to the transmission. Use a bent tip screwdriver. Pull on the open ends of the retaining ring in order to rotate the retaining ring around the quick connect fitting until the retaining ring is out of the fitting. (Scheme 112) Discard the retaining ring.
3. Pull the cooling line straight out from the quick connect fitting. (Scheme 113) Repeat this procedure to remove all the remaining cooling lines from quick connect fittings.
4. Remove the cooling lines from the radiator. (Scheme 114)
5. Remove the oil cooling lines from the auxiliary oil cooler (if equipped). (Scheme 115)

1. Install a NEW retaining ring (E clip) into the quick connect fitting using the following procedure: Hook one of the open ends of the retaining ring in one of the slots in the quick connect fitting. (Scheme 116) Rotate the retaining ring around the fitting until the retaining ring is positioned with all 3 ears through the 3 slots on the fitting. (Scheme 117) DO NOT install the new retaining ring onto the fitting by pushing the retaining ring. (Scheme 118)
2. Ensure the 3 retaining ring ears are seen from inside the fitting and that the retaining ring moves freely in the fitting slots. (Scheme 119) Install the NEW retaining ring (E clip) into the remaining quick connect fittings. Install the cooler line into the quick connect fitting. Insert the cooler line end into the quick connect fitting until a click is either heard or felt. (Scheme 120)
3. Install the cooler lines to the vehicle. (Scheme 113) Do not use the plastic cap on the cooler line in order to install the cooler line into the fitting. (Scheme 121)
4. Pull back sharply on the cooler line in order to ensure that the cooler line is fastened into the quick connect fitting. Position (snap) the plastic cap onto the fitting. (Scheme 124) Do not manually depress the retaining ring when installing the plastic cap onto the quick connect fitting. Ensure that the plastic cap is fully seated against the fitting.
5. Ensure that no gap is present between the cap and the fitting. (Scheme 122) Ensure that the Yellow identification band on the tube is hidden within the quick connect fitting. A hidden Yellow identification band indicates proper joint seating. (Scheme 123) DO NOT install the cooler line end into the fitting incorrectly. If you cannot position the plastic cap against the fitting, remove the retaining ring from the quick connect fitting.
6. Check the retaining ring and the tube end in order to ensure neither is bent. Replace the cooler line or the retaining ring if necessary, and reinstall the cooler line per the installation procedure. For vehicles without auxiliary cooling, install the cooling lines to the radiator.
7. For models with auxiliary cooling, install the cooling lines to the radiator and the cooling lines to the auxiliary oil cooler. On Escalade, in order to install the cooler line and the cooler, remove the bolts and clips that secure the transmission cooler lines to the engine clip and install the retainer clips, and the bolts and the brackets that secure the transmission cooler lines to the engine clip.
8. On all other models, install the cooling lines to the transmission. Install the cooling lines to the clips. Ensure all of the protective plastic caps are positioned over all of the quick connect fittings. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 112

Scheme 113

Scheme 114

Scheme 115

Scheme 116

Scheme 117

Scheme 118

Scheme 119

Scheme 120

Scheme 121

Scheme 122

Scheme 123

Scheme 124

1. Raise and support the vehicle. Remove the oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
2. Remove the PNP switch. See «PARK/NEUTRAL POSITION SWITCH»(ref-138423-S14907246262002041300000). Remove the manual shaft nut and the pin. (Scheme 125)
3. Remove the detent lever and the actuator assembly. Remove the bolts and the parking pawl bracket. Remove the parking pawl return spring. (Scheme 125)
4. Use a modified screw extractor in order to remove the plug. Remove the parking pawl shaft retainer, the shaft and the pawl. (Scheme 125) NOTE: If the manual shaft binds in the case during removal, file or sand the shaft in the area adjacent to the detent lever.
5. Remove the manual shaft. Remove the manual shaft seal.

1. Install the pawl shaft. Install the parking pawl. Install the plug using a 5/16" (8 mm) rod with Loctite(R) or the equivalent. (Scheme 125)
2. Install the retainer. Install the pawl return spring. Install the detent lever to the actuator assembly. Install actuator assembly over the parking pawl.
3. Install the manual shaft seal. Lubricate the manual shaft with transmission oil and install the manual shaft into the case. Install the nut on the shaft. Install the roll pin.
4. Install the parking lock bracket with the 2 bolts. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000). Install the PNP switch. See «PARK/NEUTRAL POSITION SWITCH»(ref-138423-S14907246262002041300000).
5. Install the oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 125

1. Apply the parking brake. Shift the transmission into Neutral. Disconnect the negative battery cable. Raise and support the vehicle.
2. Remove the nut securing the transmission control lever to the manual shaft. Remove the transmission control lever from the manual shaft. (Scheme 126)
3. Disconnect the wiring harness connector from the PNP switch.
4. Remove 2 bolts securing the PNP switch to the transmission. Remove the PNP switch from the manual shaft.

1. Position the adjustment tool onto the PNP switch. (Scheme 127) Ensure the 2 slots on the switch where the manual shaft is inserted are lined up with the lower 2 tabs on the tool.
2. Rotate the tool until the upper locator pin on the tool is lined up with the slot on the top of the switch. (Scheme 127) If the PNP switch did not slide off the manual shaft, file the outer edge of the manual shaft in order to remove any burrs.
3. Install the switch to the transmission manual shaft by aligning the switch hub flats with the manual shaft flats. Slide the switch onto the transmission manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission.
4. Install the switch onto the transmission. Install the bolts and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
5. Remove the adjustment tool. Install the wiring harness connector to the switch. Install the transmission control lever to the manual shaft with the nut and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
6. Lower the vehicle. Connect the negative battery cable. Check the switch for proper operation. The engine must start in the Park and Neutral positions only.
7. If vehicle does not operate as specified, readjust the PNP switch.

Scheme 126

Scheme 127

1. Raise and support the vehicle. Remove the transmission oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
2. Compress the reverse boost valve sleeve into the bore of the oil pump to release tension on the reverse boost valve retaining ring. (Scheme 128)
3. Remove the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve sleeve.
4. Remove the reverse boost valve sleeve (5) and the reverse boost valve (4). (Scheme 129)
5. Remove the pressure regulator isolator spring (3) and the pressure regulator valve spring (2). Remove the pressure regulator valve (1). (Scheme 129)

1. Install the pressure regulator valve (1). Install the pressure regulator isolator spring (3) and the pressure regulator valve spring (2). (Scheme 129)
2. Install the reverse boost valve (4) in the reverse boost valve sleeve (5). Install the reverse boost valve (4) and sleeve (5) in the oil pump cover. (Scheme 129)
3. Compress the reverse boost valve sleeve into the bore of the oil pump to expose the retaining ring slot.
4. Install the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve sleeve. (Scheme 128) Install the transmission oil filter and pan. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
5. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 128

Scheme 129

Raise and support vehicle. Remove the transmission oil pan and filter. See DRAINING & REFILLING under LUBRICATION. Remove the rear servo assembly from the transmission case as follows

1. Cover bolts (6).
2. Cover (5).
3. Cover gasket (4).
4. Bottom retaining clip (3).
5. Servo piston (2).
6. Outer ring oil seal (1).
7. Inner ring oil seal (7).
8. Accumulator piston (8).
9. Piston seal (9).
10. Washer (10).
11. Servo spring (11).
12. Servo spring retainer (12).
13. Selective pin (13).
14. Accumulator spring (14).

(Scheme 130)

1. Install the rear servo assembly into the transmission case as follows: Accumulator spring (14). Selective pin (13). Servo spring retainer (12). Servo spring (11). Washer (10). Piston seal (9). Accumulator piston (8). Inner ring oil seal (7). Outer ring oil seal (1). Servo piston (2). Bottom retaining clip (3). Cover gasket (4). Cover (5). Cover Bolt (6).
2. Install the cover bolts and tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000) .
3. Install the transmission oil pan and filter. Lower vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000) .

Scheme 130

1. Position the gearshift lever in PARK position. Raise and support the vehicle. Ensure the transmission manual shaft is positioned to mechanical Park. Remove the retainer securing the shift cable to the transmission bracket. Remove the shift cable terminal shaft end from the transmission shift lever ball stud. (Scheme 131)
2. Remove the shift cable from the transmission bracket. Depress both tangs on the conduit end fitting and push axially toward the rear of the vehicle. Locate the center connector on the transmission shift cable. Pull back the White plastic cover (1) on the center connector. see scheme 9
3. Pull up on the center tabs of the lock button (2). see scheme 10 Discard the removed E-clip. Remove the E-clip by pulling radially on the center section of the E-clip. (Scheme 132) Pull the shift cable center connector ends apart. Remove the cable half from the vehicle. Install a NEW E-clip to the shift cable end by pushing the E-clip straight down (radially) onto the cable end.
4. Position the gearshift lever to the PARK position. Remove the steering column shroud. Peel back the carpet and insulation around the driver's area. Remove the retainer securing the shift cable to the steering column. (Scheme 133) Remove the shift cable terminal shaft end from the steering column ball stud. (Scheme 134)
5. Remove the shift cable conduit end fitting from the steering column bracket. Depress both tangs on the conduit end fitting and push axially toward the base of the column. Remove the bolt securing the shift cable support to the brace. (Scheme 135)
6. Remove the shift cable from the support. (Scheme 136) Remove the shift cable grommet from the floor panel. Raise and support the vehicle. Remove the 2 clips on the shift cable from the floor panel reinforcement. Locate the center connector on the transmission shift cable. Pull back the White plastic cover (1) on the center connector. see scheme 9
7. Pull up on the center tabs of the lock button (2). see scheme 10 Disconnect the cable terminal end fitting at the transmission manual shaft ball stud. Remove the E-clip by pulling radially on the center section of the E-clip. (Scheme 132) DO NOT reuse the existing removed E-clip. Ensure the removed E-clip is discarded.
8. The new front half (steering column end) of the shift cable will contain a new pre installed E-clip. Pull the shift cable center connector ends apart. Remove the cable half from the vehicle.

1. Position the gearshift lever to the PARK position. Position the transmission manual shaft lever into the mechanical Park position. Install the 2 clips on the shift cable to the floor panel reinforcement. Route the shift cable through the hole in the floor panel. Install the shift cable grommet to the floor panel.
2. Lower the vehicle. Install the shift cable conduit end fitting to the steering column bracket. (Scheme 133) Ensure the tangs fully seat (snap) into the steering column bracket. Install the shift cable terminal shaft end to the steering column ball stud. Install the retainer securing the shift cable to the steering column. (Scheme 133) Install the shift cable to the support. (Scheme 136)
3. Install the bolt securing the shift cable support to the brace. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
4. Install the carpet and insulation around the driver's area. Install the steering column shroud. Raise and support the vehicle. Grasp the front half (cab end) of the transmission cable (1) in the left hand, and the rear half (transmission end) of the transmission cable (2) in the right hand.
5. Align the outside diameter of cable (2) with the inside of the diameter of cable (1). Push the end of the shift cable (2) inside the end of shift cable (1) until the Blue spring on shift cable (2) is fully compressed. (Scheme 137) Pushing together the 2 ends of the shift cable will engage the inner wire and lock both cable wires together. (Scheme 137)
6. DO NOT grasp the shift cable end (2) during this procedure. Release the shift cable end (2) and allow the Blue spring to tension/adjust the shift cable system. see scheme 11 Pull the white cover (3) on the shift cable end (1) back. Push the Natural colored lock button (2) down to engage the locking teeth on the shift cable end (1). Release the White cover (1). see scheme 9 Verify the White cover (1) conceals the Natural colored lock (2). see scheme 14
7. Test the transmission for proper shift operation. If all of the gear positions cannot be achieved, the shift cable must be readjusted. See «SHIFT CABLE»(ref-138423-S06540403092002041300000) under ADJUSTMENTS. Check for proper shift cable operation.

Scheme 131

Scheme 132

Scheme 133

Scheme 134

Scheme 135

Scheme 136

Scheme 137

1. Position the gearshift lever to the PARK position. Remove the carpet and the carpet retainers on the driver's side to expose the shift cable. (Scheme 138)
2. Disconnect the shift cable from the steering column shift control. (Scheme 139) Disconnect the shift cable from the retainers on the cab floor pan.
3. Raise the vehicle. Remove the cable retainer from the transmission mounted bracket. Squeeze the cable retainer while pulling the cable towards the rear of the vehicle. Disconnect the cable end from the transmission shift ball stud. (Scheme 140)
4. Position the transmission shift to Park. Rotate the shift clockwise until the lever reaches the full clockwise stop position. Remove the shift cable from under the fuel line and from the rear transmission bracket.
5. Note the routing of the shift cable on the vehicle before removal. Lower the vehicle. Remove the shift cable grommet from the floor panel. Remove the shift cable from the vehicle.

1. Ensure the transmission is in the mechanical Park position. Position the gearshift lever to the PARK position. Rotate the shift clockwise until the lever reaches the full-clockwise stop position. Install the shift cable to the vehicle. (Scheme 140)
2. Route the cable in the original location noted during removal. Install the shift cable grommet to the floor panel. Install the shift cable retainers on the cab floor pan.
3. Install the shift cable end to the steering column shift control. (Scheme 139) Make sure that the gearshift lever is in PARK. Install the carpet and the carpet retainers on the driver's side. Raise the vehicle.
4. Route the range select lever cable under the fuel lines. Connect the shift cable to the rear transmission bracket. (Scheme 140) Install the shift cable retainer to the transmission cable bracket.
5. If installing a NEW cable, remove the black shipping clip from the NEW shift cable. Discard the clip. Install the shift cable end to the gearshift lever. Push the cable end onto the transmission shift lever stud. Adjust shift cable. See «SHIFT CABLE (ESCALADE)»(ref-138423-S24034898402002041600000) under ADJUSTMENTS.

Scheme 138

Scheme 139

Scheme 140

1. Raise and support the vehicle. Remove the transmission oil pan and the filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
2. Disconnect the transmission harness 20-way connector from the transmission internal harness pass-through connector. (Scheme 142) Depress both tabs on the connector and pull straight up, do not pry the connector.
3. Remove the 1-2 accumulator assembly. See «ACCUMULATOR ASSEMBLY»(ref-138423-S37459226902002041300000).
4. Disconnect the internal wiring harness electrical connectors from the following components: Transmission fluid pressure switch, 1-2 shift control solenoid, 2-3 shift control solenoid, pressure control solenoid, TCC PWM solenoid and 3-2 shift control solenoid. (Scheme 141)
5. Remove the TCC PWM solenoid retainer. Remove the TCC PWM solenoid to access one of the TCC solenoid retaining bolts. (Scheme 143)
6. Remove the pressure control solenoid retainer. Remove the pressure control solenoid. (Scheme 100) Remove the TCC solenoid retaining bolts and the valve body bolts which retain the internal wiring harness. (Scheme 144)
7. Using the power piston seal protector and diaphragm retainer installer, release the pass-through electrical connector from the transmission case. (Scheme 145) Use the small end of the power piston seal protector and diaphragm retainer installer over the top of the connector. Twist to release the 4 tabs retaining the connector. Pull the harness connector down through the transmission case.
8. Remove the TCC solenoid (with O-ring seal) and wiring harness assembly from the transmission case.
9. Inspect the TCC solenoid and wiring harness assembly for the following defects: Damage, cracked connectors, exposed wires and loose pins. (Scheme 141)

1. Install the wiring harness and TCC solenoid assembly with a new O-ring seal to the transmission. Install the pass-through electrical connector to the transmission case. (Scheme 145)
2. Install the valve body bolts which retain the internal wiring harness and install the TCC solenoid retaining bolts. (Scheme 144) Tighten the control valve body retaining bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
3. Tighten the TCC solenoid retaining bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
4. Install the pressure control solenoid. (Scheme 100) Ensure the electrical tabs are facing outboard. Install the pressure control solenoid retainer and retaining bolt. Tighten the pressure control solenoid retaining bolt to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
5. Install the TCC PWM solenoid to the control valve body. (Scheme 143) Install the TCC PWM solenoid retainer.
6. Connect the internal wiring harness electrical connectors to the following components: Transmission fluid pressure switch, 1-2 shift control solenoid, 2-3 shift control solenoid, pressure control solenoid, TCC PWM solenoid and 3-2 shift control solenoid. (Scheme 88)
7. Connect the transmission harness 20-way connector to the transmission pass-through connector. Align the arrows on each half of the connector and insert straight down. (Scheme 142)
8. Install the transmission oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 141

Scheme 142

Scheme 143

Scheme 144

Scheme 145

Raise and support the vehicle. Remove the oil pan and the filter. See DRAINING & REFILLING under LUBRICATION. Disconnect the wiring harness if necessary. Remove the snap ring. (Scheme 146) Remove the plug. Remove the valve. Remove the spring.

Install the spring. Install the valve. Install the plug. (Scheme 146) Install the snap ring. Connect the wiring harness if necessary. Install the filter and oil pan. See DRAINING & REFILLING under LUBRICATION. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See LUBRICATION.

Scheme 146

1. Ensure that removal of the valve body is necessary before proceeding. The following components can be serviced without removing the valve body from the transmission. (Scheme 147) Torque Converter Clutch Solenoid (1) Pressure Control Solenoid (2) Internal Wiring Harness (3) 2-3 Shift Control Solenoid (4) 1-2 Shift Control Solenoid (5) Transmission Fluid Pressure Manual Valve Position Switch (6) 3-2 Shift Control Solenoid (7) Torque Converter Clutch Pulse Width Modulation Solenoid (8)
2. Remove the fluid level indicator. Raise and support the vehicle. Remove the oil pan, gasket and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION.
3. Disconnect the internal wiring harness electrical connectors from the following components: The transmission fluid pressure manual valve position switch (1), 1-2 shift control solenoid (2), 2-3 shift control solenoid (3), pressure control solenoid (4), TCC PWM solenoid (5), 3-2 shift control solenoid (6), and bracket bolt (2).
4. Remove the fluid indicator stop. (Scheme 148) Remove the fluid indicator bracket (1). Remove the TCC PWM solenoid retainer (2) with a small screwdriver. Rotate the solenoid (1) in the bore, if necessary, until the flat part of the retainer (2) is visible.
5. Remove the TCC PWM solenoid (1) to access the TCC solenoid retaining bolts. (Scheme 143) Remove the TCC solenoid retaining bolts. (Scheme 149) Remove the TCC solenoid (with O-ring seal) and wiring harness from the control valve body.
6. Reposition the harness to the side of the transmission case. (Scheme 145) Remove the control valve body bolts which retain the transmission fluid pressure switch to the control valve body. (Scheme 150) Remove the transmission fluid pressure switch. Inspect the transmission fluid pressure switch for damage or debris. (Scheme 151)
7. Remove the manual detent spring retaining bolt. Remove the manual detent spring. (Scheme 152) Inspect the manual detent spring for cracks or damage
8. Remove the remaining control valve body bolts. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link. (Scheme 153)
9. If disassembly of the control valve body is necessary, see appropriate OVERHAUL article in AUTOMATIC TRANSMISSIONS.

1. Install the 7 checkballs in the valve body. (Scheme 154) Install the control valve body to the transmission case while simultaneously connecting the manual valve link to the manual valve. (Scheme 153)
2. Verify that the manual valve link (3) is installed properly to the inside detent lever (1) and the manual valve (2). (Scheme 155) Install one bolt (M6 X 1.0 X 47.5) hand tight in the center (1) of the valve body to hold it in place. (Scheme 156) DO NOT install the transmission fluid indicator stop bracket and bolt at this time.
3. Install but do not tighten the control valve body bolts which retain only the valve body directly. (Scheme 157)
4. Each numbered bolt location corresponds to a specific bolt size and length, as indicated by the following: M6 X 1.0 X 65.0 (1). M6 X 1.0 X 54.4 (2). M6 X 1.0 X 47.5 (3). M6 X 1.0 X 35.0 (4). M8 X 1.0 X 20.0 (5). M6 X 1.0 X 12.0 (6). M6 X 1.0 X 18.0 (7).
5. Install the manual detent spring. Install but DO NOT tighten the manual detent spring retaining bolt. (Scheme 152) Install the transmission fluid pressure switch. (Scheme 150) Install but DO NOT tighten the control valve body bolts which retain the transmission fluid pressure switch to the control valve body. (Scheme 150)
6. Tighten the control valve body bolts in a spiral pattern starting from the center, as indicated by the arrows. Tighten the control valve body bolts (in sequence) to 97 INCH lbs. (11 N.m). (Scheme 157)
7. Ensure that the manual detent spring is aligned properly with the detent lever. Tighten the manual detent spring bolt to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
8. Install the TCC solenoid with a new O-ring seal to the valve body. Install the TCC solenoid bolts. Tighten the TCC solenoid retaining bolts to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
9. Install the internal wiring harness to the valve body. The internal wiring harness has a tab (1) on the edge of the conduit. Place the tab between the valve body and the pressure switch in the location shown (2). (Scheme 145) Press the harness into position on the valve body bolt bosses (1, 3).
10. Install the TCC PWM solenoid (1) to the control valve body. Install the TCC PWM solenoid retainer (2). (Scheme 143)
11. Install the transmission fluid indicator stop bracket (1) and bolt (2). (Scheme 148) Tighten the transmission fluid indicator stop bracket bolt to specification. See «TORQUE SPECIFICATIONS»(ref-138423-S24206893352002041300000).
12. Connect the internal wiring harness electrical connectors to the following components: The transmission fluid pressure manual valve position switch (1). (Scheme 99) 1-2 shift control solenoid. 2-3 shift control solenoid. Pressure control solenoid. TCC PWM solenoid. 3-2 shift control solenoid.
13. Install the transmission oil pan and filter. See «DRAINING & REFILLING»(ref-138423-S04374943222002041300000) under LUBRICATION. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 147

Scheme 148

Scheme 149

Scheme 150

Scheme 151

Scheme 152

Scheme 153

Scheme 154

Scheme 155

Scheme 156

Scheme 157

Raise and support the vehicle. Remove the electrical connector from the speed sensor. Remove the bolt. (Scheme 158) Remove the speed sensor and the O-ring seal. Inspect the seal and the transmission case. Replace the seal, if necessary.

Install the speed sensor and the O-ring seal into the transmission. (Scheme 158) Install the bolt. Tighten the bolt to specification. See TORQUE SPECIFICATIONS. Install the electrical connector to the speed sensor. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See LUBRICATION.

Scheme 158

Disconnect the speed sensor connectors (2). Remove the vehicle speed sensor bolts. Remove the vehicle speed sensors (1) and the bracket assemblies from the case. (Scheme 159) Inspect the vehicle speed sensor assemblies (1) for any evidence of damage.

Install the vehicle speed sensors (1) and the bracket assemblies on the case. (Scheme 159) Install the bolts using a socket and tighten the bolts to specification. See TORQUE SPECIFICATIONS. Connect the speed sensor connectors (2).

Scheme 159

Remove the vent hose clip. Remove the vent hose from the transmission vent. (Scheme 160)

Install the vent hose to the transmission. Install the vent hose to the clip. Install the bolt and the clamp. (Scheme 160) Tighten the bolt to specification. See TORQUE SPECIFICATIONS.

Scheme 160

1. Raise and support the vehicle. Remove the oil pan bolt below and to the left of the 2-4 servo cover. Install the servo cover depressor to the oil pan rail. Tighten the bolt on the servo cover depressor to compress the servo cover. (Scheme 161)
2. Remove the servo cover retaining ring. (Scheme 162) Loosen the bolt on the servo cover depressor to release tension on the servo cover. Remove the servo cover and O-ring seal. If the cover is hung up on the seal, use a pick (2) to pull and stretch the seal (1) out of the groove. Cut and remove the O-ring seal before removing the cover. (Scheme 163)
3. Remove the 2-4 servo assembly from the transmission.
4. Inspect the 4th apply piston, the 2-4 servo converter, 2nd apply piston, and the piston inner housing for cracks, scoring, burrs and nicks. (Scheme 164)

1. Install new seals on all the 2-4 servo pistons and the cover. (Scheme 167)
2. Install the servo cushion spring and the cushion spring retainer in the 2nd apply piston. Use the piston remover to compress the 2nd apply piston. Install the 2nd apply piston retaining ring. (Scheme 166)
3. Install the following parts: 2nd apply piston pin. Spring. Washer. Retainer ring.
4. Install the following parts: Servo return spring. 4th apply piston. (Scheme 165)and (Scheme 166).
5. Lower vehicle. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-138423-S03905544842002041300000).

Scheme 161

Scheme 162

Scheme 163

Scheme 164

Scheme 165

Scheme 166

Scheme 167

Scheme 168

Scheme 169

Scheme 170

Scheme 171