405 L4-1905cc 1.9L (1989)
Valve Body: All Technical Service Bulletins
A/T - Harsh Downshift From 4TH to 3RD Gear
BULLETIN NO. 452
DATE:
SEPTEMBER, 1992
SUBJECT:
"A" CLUTCH SHUTTLE VALVE SPRING REPLACEMENT
MODELS:
1989 TO 1991 405 VEHICLES WITH 4HP14 AUTOMATIC TRANSMISSION VIN 500001 TO 520000
COMPLAINT:
Harsh downshift from 4th to 3rd gear, especially during kick-down, or may be perceived as "slipping" in 3rd or 4th gear
CORRECTION:
Installation of "shot-peened" shuttle valve spring for "A" clutch, P/N 0025.79.
PROCEDURE - Disassembly
-
Hold accelerator in full throttle position with pedal depressor, P/N 9761.05 or equivalent.
-
Remove transmission drain plug (1).
-
Unscrew, dipstick tube nut (2).
-
Remove transmission oil pan.
-
Unscrew the 10 torx head screws as shown and remove valve body (3).
-
Position the valve body on a bench with the "A" clutch/D brake housing facing up as shown. It is not necessary to remove this housing from
the valve body for this procedure.
NOTE:
Be sure work area is clean and free of debris throughout this procedure to prevent contamination of the valve body.
