CHRYSLER A904(30RH), A999(32RH), CHRYSLER A500(42RH), A500SE(42RE)

VALVE BODY, FRONT PUMP, AND CASE CHANGES FOR 1995

CHANGE: Beginning at the start of production for all 1995 model A904(30RH), A999(32RH), A500(42RH), A500SE(42RE) rear drive transmissions, were built with a new design Front Pump, Valve Body, and a new design Main Case.

REASON: To increase pump flow and reduce front pump whine.

PARTS AFFECTED:
(1) FRONT PUMP ASSEMBLY - Has an additional inlet port in the pump cover for the 95/96 model year, as shown in Figure 1, to accommodate the changes in the main case. Find obd2 scanner? The pump body also recieved casting changes to enlarge the pump suction flow area.
(2) MAIN CASE - The rib in the case front pump face area, between the inlet ports was removed, as shown in Figure 2.
The inlet port on the valve body side was also enlarged which required casting changes, and is shown in Figure 4.
(3) VALVE BODY - Casting changes were necessary to enlarge the valve body inlet port in the transfer plate, as shown in Figure 3, to accommodate the case changes.
(4) SPACER PLATE - Inlet port made larger to accommodate the valve body transfer plate changes, as shown in Figure 3.
(5) PUMP GASKET - Added hole in the pump gasket to accommodate the changes to the pump assembly and the main case, as shown in Figure 5.

INTERCHANGEABILITY:
None of these components are interchangeable with previous model components! To ensure that the correct components have been installed, check the valve body to case interface after installation, to ensure that the seam of the valve body and case are identical.
Note: The pump gasket will retro-Jit back to all previous models, and the pump body and pump cover will retro-fit back, when used as a complete assembly, with the new gasket.

SERVICE INFORMATION:
Oil Pump Body Assembly (New Design)............................................................... 52118267
Reaction Shaft and Support Assembly, L/U (New Design).................................... 52118297
Reaction Shaft and Support Assembly, NLU (New Design) ...................................  3836511
Oil Pump Assembly Complete, Lock Up (New Design) .......................................... 4778552
Oil Pump Assembly Complete, Non Lock Up (New Design) ..................................  4778553
Oil Pump to Case Gasket (New Design) ................................................................. 52118266

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CHRYSLER A904 - SURGING BETWEEN 35-55 MPH

This bulletin supersedes Technical Service Bulletin 18-55-86, whick should be removed from your files. This repair only applies to subject vehicles equipped with a Federal Emission Package. It does not apply to 5.2L 2BBL heavy duty engines (identified by~a~ "4" in the eighth [engine] character of the VIN. Find more useful tools like ak400 and vas 5052?

SYMPTOM/CONDITION
Vehicle may exhibit a surge between steady speeds of 35 and 55 mph, with engine at full operating temperature.

DIAGNOSIS
Road test the vehicle at a steady speed between 35 and 55 mph to verify surge condition. Engine must be at full operating temperature. The surge normally is worse just after transmission lockup engagement.

PARTS REQUIRED
Drive Package PN 4419440 Consists of:
1 ESA/EFC Module                                            PN 4379255
1 6.2? Transmission Lock-Up Spring                                 PN 4202672
1 Transmission Pan Gasket                                        PN 4295875
1 Authorized Modification Label                                   PN 4275086

REPAIR PROCEDURE
This repair involves replacement of the transmission lock-up spring and a revised ESA/EFC module. The lock up speed will be raised from approximately 43 mph to 53 mph. And if you have cars, you can find some obd2 scanner to konw more about auto repair and car maintenance.

1. Raise vehicle on hoist, remove shift linkage and kickdown linkage, drain transmission fluid, and remove transmission pan.
2. Lower valve body just enough to remove torque converter lock-up spring, replace with supplied spring, PN 4202672. Re-use the existing lock-up valve, fail safe valve and spring, cover, and screws (Figure 1).
3. Reinstall valve body and torque screws to 100 inch pounds.
4. Reinstall transmission oil pan using supplied gasket, PN 4295875. Reconnect shift and kickdown linkage. Lower vehicle and refill using transmission fluid, PN 4318077. Adjust shift and kickdown linkages per the service manual procedures.
5. Remove ESA and replace with supplied ESA, PN 4379255.
6. Type Authorized Modification Label, PN 4275086, as shown in Figure 2 and attach near VECI label.