A/T - Vibration/Shudder During 1st - 2nd Gear Upshift

Article No.
93-25-13

12/08/93

^ VIBRATION/SHUDDER - 4F20E TRANSAXLE - DURING 1-2 UPSHIFT ONLY - TRANSAXLES BUILT BEFORE 11/1/92 WITH SERIAL NUMBERS LESS THAN 4Y59142

^ TRANSAXLE - 4F20E - SHUDDER OR VIBRATION DURING 1-2 UPSHIFT ONLY - TRANSAXLES BUILT BEFORE 11/1/92 WITH SERIAL NUMBERS LESS THAN 4Y59142

LIGHT TRUCK:
1993 VILLAGER

ISSUE:
A shudder or vibration may occur during the 1-2 upshift only. This generally occurs above 1/2 throttle opening and when the transaxle is at normal operating temperature. This is caused by line pressure fluctuations during the shift.

ACTION:
Replace the existing valve body with a modified valve body and install a new transaxle oil pan gasket. Refer to the following procedure for service details.








1. Confirm that transaxle was built before 11/92 and has a serial number less than 4Y59142. Refer to Figure 1 for the transaxle serial number location. Refer to Figure 2 for I.D. tag codes

2. Perform the 4F20E (automatic transaxle) Quick Test, per Section 5B-30 of the 1993 Villager Powertrain Control/Emissions Diagnosis Service Manual. Repair accordingly.

3. If the concern still exists, remove the valve body. Refer to the 1993 Villager Service Manual, Page 07-01-37, for the removal procedure.

4. Install a new valve body (F3XY-7A100-D) and transaxle oil pan gasket (F3XY-7A191-A). Refer to the 1993 Villager Service Manual, Page 07-01-38, for the installation procedure.

PART NUMBER PART NAME CLASS

F3XY-7A100-D Valve Body C
F3XY-7A191-A Transaxle Oil Pan Gasket B

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME
932513A Verify Serial Number And 1.4 Hrs.
Replace Valve Body

DEALER CODING
BASIC PART NO. CONDITION CODE
7A100 08

OASIS CODES: 501000, 504000