A/T - Slips In Reverse At Mid Throttle
NO: 21-19-95 Rev. AGROUP: Transmission
DATE: Jan 5, 1996
SUBJECT:
Automatic Transmission Slips In Reverse At Mid Throttle
NOTE:
This bulletin supersedes Technical Service Bulletin 21-19-95 dated November 24, 1995 which should be removed from your files. The labor operation number coverage statements for both 4X2 and 4X4 vehicles has been revised to fit the repair and is marked with **asterisks**
MODELS: 1996 (AB) Ram Van/wagon
1996 (AN) Dakota
1996 (BR) Ram Truck
NOTE:
This bulletin applies to vehicles built with the 36RH and 46RE transmissions only built prior to December 1, 1995 (MDH 12-01-XX)
SYMPTOM/CONDITION:
Automatic transmission slips in reverse at mid throttle.
PARTS REQUIRED:
1 52118761 Line Pressure Sleeve, Transmission Regulator Valve
1 52118763 Plug, Transmission Regulator Valve
AR Reverse Drum
AR Reverse Band
AR Rear Servo Assembly
REPAIR PROCEDURE:
This bulletin involves replacing the regulator valve line pressure sleeve and plug. The reverse drum, reverse band, and rear servo assembly must also be inspected and replaced as necessary.
1. Check the transmission fluid level and correct as needed.
2. Disconnect the negative battery cable.
3. Disconnect the throttle valve cable and lever, the shift linkage, and the manual valve lever.
4. Raise the vehicle on a suitable hoist so that the transmission valvebody pan is accessible.
5. Remove the valvebody pan (use precaution when draining hot transmission fluid).
6. Remove the valvebody.
7. Visually inspect the reverse drum and the reverse band for signs of heat distress and or wear. If either are noted, the reverse drum, reverse band, and valve body must be replaced. The transmission must then be thoroughly cleaned including a cooling system flush.
8. Remove the two fasteners from the valve cover plate on the upper valvebody and remove the cover plate.
9. Remove the regulator valve line pressure sleeve and plug. Figure 1
NOTE:
If the sleeve appears to have a red finish, the new plug and sleeve have already been installed and a problem exists elsewhere in the system. Refer to the appropriate transmission section for further diagnostics.
10. Install the new regulator valve line pressure sleeve (P/N 52118761) and plug (P/N 52118763) in the same position as previous parts were removed from. Figure 1
11. Install the cover and torque the fasteners to 35 in lbs (4 Nm).
12. Visually inspect the rear servo piston assembly for any signs of cracking or fatigue, replace as required.
13. Install the valvebody and torque the fasteners to 100 in lbs (11 Nm).
14. Install the valvebody pan and torque the fasteners to 13 ft. lbs (17 Nm).
15. Lower the vehicle.
16. Reconnect the manual valve lever, the throttle valve lever and cable, and shift linkage. Adjust the shift linkage and the throttle valve cable per the appropriate service manual procedures.
17. Connect the negative battery cable.
18. Fill the transmission with MS-7176 (Mopar P/N 4467721).
19. Check the fluid level with the parking brake on, the gear selector in neutral, and the engine on. Adjust the level as required.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: **21-55-01-94 2.3 Hrs.
1996 (AB,AN,BR) (4x2 Models)
Replace Line Pressure Valve, Regulator Valve Plug.**
**21-55-01-95 3.1 Hrs
1996 (AB,AN,BR) (4x4 Models)
Replace Line Pressure Valve, Regulator Valve Plug.**
Optional Equipment: 21-00-01-60 0.2 Hrs
1996 (AB,AN,BR) (4x4 Models)
Skid Plate Equipped
FAILURE CODE: P8 - New Part