Automatic Transmission - 4L80-E - Servicing: Removal & Installation Chevrolet Silverado 1500 HD

REMOVAL & INSTALLATION

Removal

1. Remove the valve body. See «VALVE BODY & PRESSURE SWITCH»(ref-154137-S10522956332003050600000).
2. Remove the 3rd and 4th clutch accumulator housing bolts (53). (Scheme 231)
3. Remove the 3rd and 4th clutch accumulator housing (51).
4. Remove the accumulator housing gasket (47). The accumulator housing gasket may be stuck to the spacer plate (46).
5. Remove the 3rd clutch accumulator piston spring (50).
6. Remove the 4th clutch accumulator piston spring (49).
7. Remove the valve body spacer plate (46).
8. Remove the valve body to spacer plate gasket (45) from the spacer plate (46).

Scheme 231

Installation

1. Install valve body align pin into the valve body bolt hole where the manual shaft detent roller and spring is mounted.
2. Install the valve body gasket (2) onto the accumulator housing (1). (Scheme 232)
3. Install the valve body spacer plate (3) onto the valve body gasket (2).
4. Install the third and fourth clutch accumulator housing gasket (3). (Scheme 233)
5. Install the third clutch accumulator piston spring (1). This spring is the longer of the two springs.
6. Install the fourth clutch accumulator piston spring (4).
7. Install the third and fourth clutch accumulator housing assembly (5) onto the control valve body assembly (2).
8. Install the six accumulator housing bolts (6). Start the bolts finger tight and work towards the opposite end.
9. Tighten the accumulator housing bolts sequentially. (Scheme 234) Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
10. Remove the valve body align pin.
11. Install the valve body. See «VALVE BODY & PRESSURE SWITCH»(ref-154137-S10522956332003050600000).

Scheme 232

Scheme 233

Scheme 234

1. Remove the grille assembly.
2. Remove the transmission fluid cooler hoses from the auxiliary cooler. See «OIL COOLER LINE QUICK CONNECT FITTING»(ref-154137-S26411518782003050700000).
3. Remove the auxiliary oil cooler bolts (1). (Scheme 235)
4. Remove the auxiliary oil cooler push pins (2).
5. Remove the auxiliary oil cooler from the vehicle.

Scheme 235

1. Install the auxiliary oil cooler to the vehicle.
2. Install the bolts (1) to the radiator brace. (Scheme 235) Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
3. Install the push pins (2) to the radiator brace.
4. Connect the transmission oil cooler lines to the auxiliary cooler. See «OIL COOLER LINE QUICK CONNECT FITTING»(ref-154137-S26411518782003050700000).
5. Install the grille assembly.

1. Support the transmission with a transmission jack.
2. Place a drain pan under the vehicle.
3. Remove the drive shaft. See REMOVAL & INSTALLATION in appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
4. Remove the transmission mount. See appropriate REMOVAL & INSTALLATION article.
5. Remove the case extension bolts.
6. Remove the case extension. (Scheme 236)
7. Remove and discard the case extension "O" ring seal.

Scheme 236

1. Install a NEW case extension "O" ring seal.
2. Install the case extension. (Scheme 236)
3. Install the case extension bolts. Tighten the case extension bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
4. Install the transmission mount. See appropriate REMOVAL & INSTALLATION article.
5. Install the drive shaft. See REMOVAL & INSTALLATION in appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
6. Remove the drain pan and the transmission jack.
7. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-154137-S16097255672003050600000).

1. Place a drain pan under the vehicle.
2. Remove the drive shaft. See REMOVAL & INSTALLATION in appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
3. Using the slide hammer and the universal seal remover, remove the output shaft seal from the extension housing. (Scheme 237)
4. Inspect the case extension housing for damage. Replace the extension housing if necessary. See «EXTENSION HOUSING ASSEMBLY»(ref-154137-S03339697452003050600000).

Scheme 237

1. Lubricate the inside diameter of the new seal with assembly lubricant.
2. Use the output shaft seal installer with a soft faced mallet to install the seal. (Scheme 238)
3. Install the seal to the extension housing.
4. Install the drive shaft. See REMOVAL & INSTALLATION in appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
5. Remove the drain pan and lower the vehicle.
6. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-154137-S16097255672003050600000).

Scheme 238

1. Remove the transmission fluid level indicator. (Scheme 239)
2. Raise and support the vehicle.
3. Remove the fill tube bracket nut.
4. Place a drain pan under the transmission.
5. Remove the fill tube. (Scheme 240)
6. Remove the transmission fill tube seal.

Scheme 239

Scheme 240

1. Install the transmission fill tube seal. (Scheme 240)
2. Install the fill tube.
3. Remove the drain pan from under the transmission.
4. Install the fill tube bracket nut. (Scheme 239)
5. Lower the vehicle.
6. Install the oil level indicator. Tighten the nut to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
7. Fill the transmission to the proper level with appropriate transmission fluid. See «LUBRICATION»(ref-154137-S16097255672003050600000).

1. Remove the oil pan and filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.
2. Remove the forward servo cover bolts, cover and gasket.
3. Remove the following parts: Forward servo piston pin (5). (Scheme 241) "O" ring seal (4). Servo piston (3). Retainer (2). Piston spring (1).

Scheme 241

1. Install the following parts: Piston spring (1). (Scheme 241) Retainer (2). Servo piston (3). "O" ring seal (4). Forward servo piston pin (5).
2. Install the forward servo gasket, cover, and bolts. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
3. Install the oil pan and filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.

1. Pull the plastic cap back from the quick connect fitting and down along the cooler line about 2" (5 cm).
2. Using a bent-tip screwdriver, pull on one of 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 position and can be completely removed. (Scheme 242)
3. Remove the retaining ring from the quick connect fitting.
4. Discard the retaining ring.
5. Pull the cooler line straight out from the quick connect fitting. (Scheme 243)

Scheme 242

Scheme 243

Note. DO NOT reuse any of the existing oil lines or oil line fittings if there is excessive corrosion. DO NOT reuse any of the existing retaining rings that were removed from the existing quick connect fittings. Install new retaining rings.

1. Install a new retaining ring 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 244) Rotate the retaining ring around the fitting until the retaining ring is positioned with all three ears through the three slots on the fitting. (Scheme 245) DO NOT install the new retaining ring onto the fitting by pushing the retaining ring. (Scheme 246) Ensure that the three retaining ring ears are seen from inside the fitting and that the retaining ring moves freely in the fitting slots. (Scheme 247)
2. Install the cooler line into the quick connect fitting. (Scheme 248)
3. Insert the cooler line end into the quick connect fitting until a click is either heard or felt.
4. DO NOT use the plastic cap on the cooler line in order to install the cooler line into the fitting. (Scheme 249)
5. Pull back sharply on the cooler line in order to ensure that the cooler line is fastened into the quick connect fitting.
6. Position (snap) the plastic cap onto the fitting. DO NOT manually depress the retaining ring when installing the plastic cap onto the quick connect fitting. (Scheme 250)
7. Ensure that the plastic cap is fully seated against the fitting.
8. Ensure that no gap is present between the cap and the fitting. (Scheme 251)
9. Ensure that the yellow identification band on the tube is hidden within the quick connect fitting. (Scheme 250)
10. A hidden yellow identification band indicates proper joint seating. (Scheme 252)
11. Fill the transmission to the proper level with appropriate transmission fluid. See «LUBRICATION»(ref-154137-S16097255672003050600000).

Scheme 244

Scheme 245

Scheme 246

Scheme 247

Scheme 248

Scheme 249

Scheme 250

Scheme 251

Scheme 252

1. Remove the oil pan and filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.
2. Remove the PNP switch. See «PARK/NEUTRAL POSITION SWITCH»(ref-154137-S19180835892003050600000).
3. Remove the manual shaft nut and the pin. (Scheme 253)
4. Remove the detent lever and the actuator assembly.
5. Remove the bolts and the parking pawl bracket.
6. Remove the parking pawl return spring. (Scheme 253)
7. Use a modified screw extractor in order to remove the plug.
8. Remove the parking pawl shaft retainer, the shaft and the pawl. (Scheme 253) NOTE: If the manual shaft binds in the case during removal, file or sand the shaft in the area adjacent to the detent lever.
9. Remove the manual shaft.
10. Remove the manual shaft seal.

Scheme 253

1. Install the pawl shaft.
2. Install the parking pawl.
3. Install the plug using a 5/16 INCH or (8 mm) rod with Loctite(R) or the equivalent. (Scheme 253)
4. Install the retainer.
5. Install the pawl return spring.
6. Install the detent lever to the actuator assembly.
7. Install actuator assembly over the parking pawl.
8. Install the manual shaft seal.
9. Lubricate the manual shaft with transmission oil and install the manual shaft into the case.
10. Install the nut on the shaft.
11. Install the roll pin.
12. Install the parking lock bracket bolts. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
13. Install the PNP switch. See «PARK/NEUTRAL POSITION SWITCH»(ref-154137-S19180835892003050600000).
14. Install the oil pan and filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.
15. Fill transmission with appropriate fluid to proper level. See «LUBRICATION»(ref-154137-S16097255672003050600000).

1. Apply the parking brake.
2. Place the transmission into Neutral.
3. If equipped with 4-Wheel Drive (4WD), remove the front drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
4. Raise and support the vehicle.
5. Disconnect the park/neutral position (PNP) switch electrical connectors (5). (Scheme 254)
6. Remove the range selector cable end (2) from the range selector lever ball stud (1). see scheme 4
7. Remove the control lever to the manual shaft nut. (Scheme 255)
8. Remove the control lever from the manual shaft.
9. Remove the PNP switch bolts.
10. Remove the PNP switch from the manual shaft. If the PNP switch does not slide off the manual shaft, file the outer edge of the manual shaft in order to remove any burrs.

Scheme 254

Scheme 255

1. Install the PNP switch to the manual shaft by aligning the switch hub flats with the manual shaft flats. (Scheme 255)
2. Slide the PNP switch onto the manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission. NOTE: If a new PNP switch is being installed, the switch will come with a positive assurance bracket. The positive assurance bracket aligns the new switch in its proper position for installation and the use of the park neutral switch aligner will not be necessary.
3. Install the PNP switch bolts finger tight.
4. Position the park neutral switch aligner onto the PNP switch. Ensure that the two slots on the switch where the manual shaft is inserted are lined up with the lower two tabs on the tool. (Scheme 256)
5. Rotate park neutral switch aligner until the upper locator pin on the tool is lined up with the slot on the top of the switch. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
6. Remove park neutral switch aligner from the PNP switch. If installing a new switch, remove the positive assurance bracket at this time.
7. Install the control lever to the manual shaft with the nut. (Scheme 255)
8. Install the manual shaft nut. Tighten the nut to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
9. Install the range selector cable end (2) to the range selector lever ball stud (1). see scheme 4
10. Connect the PNP switch electrical connectors (5). (Scheme 254)
11. If equipped with 4WD, install the front drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
12. Lower the vehicle.
13. Check the PNP switch for proper operation. The engine must start in the Park (P) or Neutral (N) positions only. If proper operation of the switch can not be obtained, replace the switch.

Scheme 256

1. Raise and suitably support the vehicle.
2. Remove the transmission filter. WARNING: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
3. Remove the reverse boost valve bushing retainer ring (2). (Scheme 257)
4. Remove the following from the reverse boost valve cylinder: The reverse boost valve bushing. (Scheme 258) The reverse boost valve. The pressure regulator spring retainer. The pressure regulator spring. The pressure regulator valve. The reverse boost valve bushing.

Scheme 257

Scheme 258

1. Install the pressure regulator valve using Transjel(R).
2. Pre-assemble the following parts: The reverse boost valve bushing. (Scheme 258) A new reverse boost valve. A new pressure regulator spring retainer. The added isolator pressure regulator spring. The pressure regulator spring.
3. Install the pre-assembled parts into the pump bore.
4. Install the reverse boost valve bushing retainer ring while holding the reverse boost valve bushing in place. Ensure the retainer ring (2) is in the groove. (Scheme 257)
5. Install the transmission filter.
6. Fill the transmission to the proper level with appropriate transmission fluid. See «LUBRICATION»(ref-154137-S16097255672003050600000).

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). (Scheme 259)
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 259

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-154137-S39198836352003050600000) .
3. Install the transmission oil pan and filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) .

1. Apply the parking brake.
2. Place the transmission into Neutral.
3. Raise and support the vehicle.
4. Remove the retainer that secures the cable to the bracket. (Scheme 260)
5. Depress the tangs and remove the cable from the bracket.
6. Remove the bolts (1) securing the transmission range selector cable bracket (2) to the transmission. see scheme 5
7. Remove the transmission range selector cable bracket.

Scheme 260

1. Install the transmission range selector cable bracket.
2. Install the shift cable bracket bolts (1). see scheme 5 Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
3. Align and install the cable to the bracket. (Scheme 260)
4. Install the retainer that secures the cable to the bracket.
5. Lower the vehicle.
6. Check the vehicle for proper operation. If cable adjustment is necessary, see «SHIFT CABLE BRACKET»(ref-154137-S18064285142003050600000) under ADJUSTMENTS.

1. Position the steering column shift lever to the Park position.
2. Remove the instrument panel knee bolster.
3. Remove the driver's seat.
4. Pull back the carpet and insulation around the driver's area.
5. Remove the retainer securing the cable to the steering column. (Scheme 261)
6. Remove the cable end from the steering column ball stud. (Scheme 262)
7. Depress the tangs and remove the cable from the steering column bracket.
8. Remove the bolt securing the cable support to the brace. (Scheme 263) NOTE: Avoid unnecessary twisting/bending of the range selector cable when removing the cable from the support.
9. Remove the range selector cable from the support. (Scheme 264)
10. Remove the cable grommet from the floor panel. (Scheme 265)
11. Raise and suitably support the vehicle.
12. Remove the clips on the cable from the floor panel reinforcement. (Scheme 266)
13. Ensure the transmission manual shaft is positioned in mechanical Park.
14. Remove the retainer that secures the cable to the bracket. (Scheme 260)
15. Remove the cable clip on the transfer case, if equipped.
16. Remove the range selector cable end (2) from the transmission range selector lever ball stud (1). see scheme 4
17. Depress the tangs and remove the cable from the bracket.
18. Lower the vehicle and ensure that the steering column shift lever is still in the Park position.

Scheme 261

Scheme 262

Scheme 263

Scheme 264

Scheme 265

Scheme 266

1. Ensure that the transmission manual shaft lever is in the mechanical Park position.
2. Align and install the cable to the bracket.
3. Install the range selector cable end (2) to the transmission range selector lever ball stud (1). see scheme 4
4. Install the cable clip on the transfer case, if equipped.
5. Install the retainer that secures the cable to the bracket. (Scheme 260)
6. Install the clips on the cable to the floor panel reinforcement. (Scheme 266)
7. Lower the vehicle.
8. Install the cable grommet to the floor panel. (Scheme 265) NOTE: Avoid unnecessary twisting/bending of the range selector cable when installing the cable to the support.
9. Install the range selector cable to the support. (Scheme 264)
10. Install the bolt securing the cable support to the brace. (Scheme 263) Tighten the bolt to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
11. Install the cable to the steering column bracket. (Scheme 262)
12. Ensure the tangs fully seat (snap) into the steering column bracket.
13. Install the cable end to the steering column ball stud.
14. Install the retainer securing the cable to the steering column. (Scheme 261)
15. Position the carpet and insulation around the driver's area.
16. Install the driver's seat.
17. Install the instrument panel knee bolster.
18. Test the transmission for proper shift operation.
19. If all of the gear positions cannot be achieved, adjust the cable.

1. Remove the oil pan and the filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION. WARNING: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
2. Remove the valve bore plug retainer ring (1). (Scheme 257)
3. Remove the following parts: The valve bore plug. (Scheme 258) The TCC valve. The TCC valve spring.

1. Install the following parts: The TCC valve spring. (Scheme 258) The TCC valve. The valve bore plug.
2. Install the valve bore plug retainer ring (1). (Scheme 257)
3. Install the filter and oil pan. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.

1. Ensure that removal of the valve body is necessary before proceeding. (Scheme 267) The following components can be serviced without removing the valve body: The 2-3 solenoid (1). The internal wiring harness (2). The 1-2 shift solenoid (3). The transmission fluid temperature sensor (4). The transmission fluid pressure manual valve position switch (5). The pressure control solenoid (6). The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid (7).
2. Remove the fluid level indicator.
3. Remove the transmission filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.
4. Disconnect the internal wire harness from the Transmission Fluid Pressure (TFP) manual valve position switch. NOTE: Use care not to loose the 5 "O" rings that are located between the TFP manual valve position switch and the valve body.
5. Remove the valve body bolts (1) that retain the TFP manual valve position switch (2). (Scheme 268)
6. Remove the TFP manual valve position switch.
7. Disconnect the internal wiring harness electrical connectors from the remaining valve body electrical components.
8. Remove the lube oil pipe bolt (6) and retainer (7). (Scheme 269)
9. Remove the lube oil pipe (5).
10. Remove the manual shaft detent spring bolt and spring (3). NOTE: Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of checkballs located in the valve body passages.
11. Remove the remaining valve body bolts.
12. Carefully lower the valve body from the transmission. Use care not to drop the manual shaft valve.
13. Remove the valve body (2) which includes the following: The accumulator housing (1). The valve body to the spacer plate gasket. The spacer plate.
14. Remove the manual valve (1) from the valve body. (Scheme 270)
15. Inspect the manual valve for nicks and burrs.
16. Remove the spacer plate to case gasket (2) from the case. The gasket may stick to the spacer plate. (Scheme 271)
17. Remove the PWM screen (1) from the case passage.
18. Remove the manual 2-1 band servo (1). (Scheme 272)
19. Remove the servo piston cushion spring (2).
20. Remove the manual 2-1 band servo piston pin retainer ring (2). (Scheme 241)
21. Remove the manual 2-1 band servo piston pin (5).
22. Remove the manual 2-1 band servo piston seal (4). NOTE: DO NOT use a magnet in order to remove the checkballs. Using a magnet to remove the checkballs may magnetize the checkballs, causing metal particles to stick.
23. Remove the 8 checkballs (9 checkballs for some models). (Scheme 273)

Scheme 267

Scheme 268

Scheme 269

Scheme 270

Scheme 271

Scheme 272

Scheme 273

1. Install the 8 checkballs (9 checkballs for some models) into the valve body. (Scheme 273) The checkball marked as number 2, is used on RCP, RDP, ZJP and ZLP models only. To hold the checkballs in place, use the Transjel(R).
2. Install the PWM screen into the valve body.
3. Install a new manual 2-1 band servo piston seal (4) onto the manual 2-1 band servo piston (3). (Scheme 241)
4. Install the manual 2-1 band servo piston pin (5) into the manual 2-1 band servo piston (3).
5. Install the manual 2-1 band servo piston pin retainer ring (4).
6. Install the manual 2-1 band servo piston cushion spring (2). (Scheme 272) NOTE: Make certain that the tapered end of the manual 2-1 band servo piston pin contacts the manual 2-1 band.
7. Install the manual 2-1 band servo piston (1).
8. Install the manual valve (1) into the valve body. (Scheme 270)
9. To aid in alignment and assembly, install valve body align pin. (Scheme 274)
10. Install the valve body gasket (6).
11. Install the valve body (5). Attach the manual valve to the detent lever while installing the valve body.
12. Install the transmission fluid pressure manual valve position switch (2). (Scheme 268)
13. Install the transmission fluid pressure manual valve position switch bolts (1) finger tight.
14. Tighten the bolts in the order shown. (Scheme 275) Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
15. Remove valve body align pin.
16. Install the manual shaft detent roller and spring (3) and bolts. (Scheme 269)
17. Install the 2 wiring harness clips (1) and bolts (2).
18. Install the wiring harness clip (1) and bolts (2).
19. Install the lube oil pipe (5) with the short end into the valve body.
20. Install the lube oil pipe retainer (7) and the bolt (6).
21. Install the valve body bolts and tighten in the order shown. (Scheme 276) Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
22. Install the remaining valve body bolts. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
23. Connect the internal wiring harness to the valve body electrical components.
24. Install the transmission filter. See «DRAINING & REFILLING»(ref-154137-S36879676582003050600000) under LUBRICATION.

Scheme 274

Scheme 275

Scheme 276

1. Raise the vehicle.
2. Disconnect the input speed sensor (1) electrical connector. (Scheme 254)
3. Remove the input speed sensor bolt.
4. Remove the input speed sensor (1). (Scheme 277)
5. Inspect the vehicle speed sensor assembly (1) for any evidence of damage.

Scheme 277

1. Lubricate the input speed sensor seal with automatic transmission fluid.
2. Install the input speed sensor (1). (Scheme 277)
3. Install speed sensor bolt. Tighten the bolt to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
4. Connect the input speed sensor electrical connector. (Scheme 254)
5. Lower the vehicle.

Note. This procedure is for 2WD vehicles. If the vehicle is equipped with 4WD, the output speed sensor is located on the transfer case.

1. Raise and support the vehicle.
2. Disconnect the output speed sensor (2) electrical connector. (Scheme 254)
3. Remove the output speed sensor bolt.
4. Remove the output speed sensor (2). (Scheme 277)
5. Inspect the output speed sensor assembly (2) for any evidence of damage.

1. Lubricate the output speed sensor seal with ATF.
2. Install the output speed sensor (2). (Scheme 277)
3. Install the output speed sensor bolt. Tighten the bolt to specification. See «TORQUE SPECIFICATIONS»(ref-154137-S39198836352003050600000).
4. Connect the output speed sensor (2) electrical connector. (Scheme 254)
5. Lower the vehicle.

Remove the vent hose clip. Remove the vent hose from the transmission vent. (Scheme 278)

Scheme 278

Install the vent hose to the transmission. Install the vent hose to the clip. Install the bolt and the clamp. (Scheme 278) Tighten the bolt to specification. See TORQUE SPECIFICATIONS.