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AS68RC Automatic Transmission - Service Information: Specifications RAM Pickup 2500

Automatic Trans 7 illustrations ~665 words

SPECIFICATIONS

Transmission TypeSix-Speed Automatic, Electronically Controlled, Fully Adaptive, Electronically Modulated Torque Converter
Lubrication MethodPump (internal - external gear-type)
Cooling MethodWater Heat Exchanger and/or Air-to-Oil Heat Exchanger
Recommended FluidMopar® AS68RC
Overhaul Capacity13 L (13.74 Quarts)
Service Fill6.8 L (7.2 Quarts)

GENERAL SPECIFICATIONS

ComponentMetricInch
Output Shaft End- Play0.50 - 0.90 mm0.019 - 0.035 in.
Input Shaft End- Play0.50 - 0.90 mm0.019 - 0.035 in.
4WD Extension Housing Output Shaft End- Play (with external selectable washer in place)0.00 - 0.24 mm0.000 - 0.009 in.
B1 Brake Clutch Pack Clearance1.25 - 1.50 mm0.049 - 0.059 in.
B1 Brake Piston Stroke1.55 - 1.80 mm0.061 - 0.071 in.
B2 Brake Clutch Pack Clearance1.60 -.2.04 mm0.063 - 0.080 in.
B2 Brake Piston Stroke1.84 - 2.28 mm0.072 - 0.090 in.
K1 Clutch Pack Clearance1.25 - 1.50 mm0.049 - 0.059 in.
K1 Clutch Piston stroke1.49 - 1.74 mm0.059 - 0.069 in.
K2 Clutch Pack Clearance1.25 - 1.50 mm0.049 - 0.059 in.
K2 Clutch Piston Stroke1.60 - 1.85 mm0.063 - 0.071 in.
K3 Clutch Pack Clearance1.25 - 1.50 mm0.049 - 0.059 in.
K3 Clutch Piston Stroke1.60 - 1.85 mm0.063 - 0.071 in.
Oil Pump Side Clearance0.02 - 0.055 mm0.0008 - 0.002 in.

CLEARANCES

1ST3.74:1
2ND2.00:1
3RD1.34:1
4TH1.00:1
5TH0.77:1
6TH0.63:1
REVERSE3.54:1

GEAR RATIOS

DESCRIPTIONN.mFt. Lbs.In. Lbs.
Fitting, cooler line at trans4432
Fitting , Jiffy Tite2518
Bolt, torque convertor5037
Bolt / nut, crossmember6850
Bolt, differential pressure sensor1088
Bolt, flexplate to crankshaft7555
Bolt, oil pan drain2216
Bolt , fluid filter1088
Bolt, extension housing3727
Bolt, oil pump2115.5
Bolt, oil pump body to cover2115.49
Plug, pressure sensing2720
Bolt, PTO cover1511
Bolt, P1 planetary carrier to transmission case2821
Bolt , torque converter housing6447
Bolt, oil pan762
Bolt , filler tube12.59
Bolt , transmission range12.5106
Electrical harness connectors to case (valve body)871
Bolt, 4WD Extension housing seal plate at output shaft1712.5
Nut, transmission range762
Bolt, input speed sensor870
Bolt, output speed sensor870
External temperature sensor (at cooler line fitting)3425
Nut, output shaft210155
Nuts, manual shift lever12.59

TORQUE

VALVE BODY TORQUE SPECIFICATIONS

DESCRIPTIONN.mIn. Lbs.
Bolt, upper valve body to lower valve body (M5)5.549
Bolts, separator plate to lower valve body (M6)1088
(2) 58 mm (2.28 in.)1088
(3) 31.2 mm (1.23 in.)1088
(4) 42.5 mm (1.67 in.)1088
(5) 43 mm (1.69 in.)1088
(6) 51 mm (2.00 in.)1088
(7) 57.2 mm (2.25 in.)1088
(8) 41.5 mm (1.63 in.)5.549
(15) 32.2 mm (1.27 in.)1088

VALVE BODY TORQUE

Refer to VALVE BODY , Installation .

Scheme 577

Scheme 577: REMOVAL
Scheme 577: REMOVAL

Scheme 578

Scheme 578
Scheme 578

Scheme 579

Scheme 579
Scheme 579

Scheme 580

Scheme 580
Scheme 580

Scheme 581

Scheme 581
Scheme 581

Scheme 582

Scheme 582
Scheme 582

Scheme 583

Scheme 583
Scheme 583
  1. Disconnect the negative battery cable.
  2. Raise and support the vehicle.
  3. Remove any necessary skid plates. Refer to «PLATE, Skid, Front , Removal»(ref-457829-S37099224772012030200000) and «PLATE, Skid, Transfer Case , Removal»(ref-457829-S06628527422012030200000) .
  4. Mark propeller shaft and axle companion flanges for assembly alignment.
  5. Remove the rear propeller shaft.
  6. Remove the front propeller shaft, if necessary.
  7. Remove the engine to transmission inspection cover.
  8. Remove the exhaust support bracket from the rear of the transmission.
  9. Remove the exhaust particulate filter. 1 - OPENING 3 - TORQUE CONVERTER 2 - DRIVE PLATE 4 - TORQUE CONVERTER BOLT
  10. Rotate crankshaft in clockwise direction until torque converter bolts (4) are accessible. Then remove the 6 bolts one at a time. Rotate crankshaft with socket wrench on dampener bolt. CAUTION: Tag the orientation of all electrical connectors. Some electrical connectors may be interchangeable, damage to the electrical system may occur if the connectors are reversed. 1 - INPUT SPEED SENSOR 2 - OUTPUT SPEED SENSOR
  11. Disconnect the input speed sensor (1), output speed sensor (2), electrical connectors and position the harness aside.
  12. Disconnect the transmission valve body solenoid and pressure switch electrical connectors and position harness aside.
  13. Disconnect the cooler line temperature sensor electrical connector and position harness aside. 1 - SHIFT CABLE BRACKET 4 - MANUAL SHIFT LEVER 2 - SHIFT CABLE 5 - SHIFT CABLE BRACKET BOLT 3 - SHIFT CABLE BALL SOCKET
  14. Disconnect gearshift cable ball socket (3) from transmission manual valve lever (4).
  15. Remove the shift cable (2) from the shift cable bracket (1).
  16. Remove the shift cable bracket bolt (5) and shift cable bracket (1). 1 - BOLT
  17. Remove the bolt (1) securing the differential pressure sensor to the transmission case, if equipped. 1 - ENGINE 2 - TRANSMISSION
  18. Disconnect the transmission vent hose from the transmission.
  19. Support rear of engine with safety stand or jack. NOTE: Support the transmission where the transmission oil pan meets the transmission case.
  20. Raise transmission slightly with service jack to relieve load on crossmember and supports.
  21. Remove bolts securing rear support and cushion to transmission and crossmember.
  22. Remove transfer case, if necessary. Refer to appropriate Transfer Case Removal Information. .
  23. Remove the nuts (1) securing the power bending bracket to extension housing, if equipped. 1 - TEMPERATURE SENSOR 2 - JIFFY TITE FITTINGS 3 - COOLER LINE FITTINGS
  24. Disconnect transmission fluid cooler lines at transmission Jiffy Tite fittings (2) with quick connect tool (special tool #9546, Disconnect Tool).
  25. Remove all remaining converter housing bolts.
  26. Carefully work transmission and torque converter assembly rearward off engine block dowels.
  27. Hold torque converter in place during transmission removal.
  28. Lower transmission (2) and remove assembly from under the vehicle. CAUTION: Verify that transmission is secure on the lifting device or work surface, the center of gravity of the transmission will shift when the torque converter is removed creating an unstable condition. The torque converter is a heavy unit. Use caution when separating the torque converter from the transmission.
  29. To remove torque converter, carefully slide torque converter out of the transmission.

Torque Converter Solenoid

In order to reduce heat build-up in the transmission, the TCM can turn on or off the Torque Converter Solenoid as needed. This function can occur at various times depending on the following variables

  1. Shift lever position
  2. Current gear range
  3. Transmission fluid temperature
  4. Input speed
  5. Throttle angle
  6. Engine speed

TORQUE CONVERTER CLUTCH (TCC)

In a standard torque converter, the impeller and turbine are rotating at about the same speed and the stator is freewheeling, providing no torque multiplication. By applying the lockup clutch, the turbine and impeller rotate together removing any slip. The result of this engagement is a direct 1:1 mechanical link between the engine and the transmission.

The clutch can be engaged in second, third, fourth, fifth and, sixth gear ranges.

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