DeVille V8-4.6L VIN Y (1998)
PROM - Programmable Read Only Memory: Customer Interest
A/T - Harsh Gear Shift/Harsh/Delayed Engagement
File In Section: 7 - Transmission
Bulletin No.: 87-71-65
Date: June, 1998
Subject:
Harsh Garage Shift, Harsh or Delayed Engagement of Park to Reverse or Drive to Reverse (Install SRTA and Reflash Calibration)
Models:
1998 Cadillac DeVille, Eldorado, Seville
1998 Oldsmobile Aurora
Built Prior to February 16, 1998 with HYDRA-MATIC 4T80-E Transaxle (RPO MH1) and 4.0L, 4.6L Engine (VINs C, Y, 9 - RPOs L47, LD8, L37)
Condition
(See Figure 1)
Some customers of vehicles equipped with the above transaxles built prior to February 16, 1998 (Julian Date 047) may comment on a harsh garage shift,
sometimes described as a delayed or harsh engagement from park to reverse or drive to reverse. The customer may also describe this as a metallic
"clunk" noise at the end of the shift.
Cause
This condition may be due to a combination of reverse clutch configuration, accumulation and vehicle calibration of this shift maneuver.
Original Model Code Before February 16, 1998
8AAN 4.6L (LD8) E/K/K-Spec
8ABN 4.6L (LD8) E/K/K-Spec
8ADN 4.6L (L37) E/K/K-Spec
