Bonneville V6-231 3.8L (1984)
Parking Pawl: Customer Interest
A/T - Intermittent No Reverse or Locks In Reverse
Number
87-7-37
Date
8/87
Subject:
INTERMITTENT NO REVERSE OR LOCKS IN REVERSE
1984-87 6000 AND BONNEVILLE MODELS EQUIPPED WITH THM 440-T4 TRANSAXLE
BULLETIN COVERS:
A 1984 through 1987 vehicle equipped with a THM 440-T4 transaxle may have an intermittent no reverse or locking in reverse condition until shifted to
a forward range prior to shifting into reverse ("unloading" the parking pawl). This condition may be caused by a "dent" on the parking pawl that does not
allow the pawl to release until "unloaded".
Figure 1 - THM 440-T4 Transaxle Identification Information
DATE OF PRODUCTION CHANGE:
(Figure 1)
Effective May 1, 1987 (Julian date 121) all 1987 THM 440-T4 transaxles were produced with parking pawl assemblies not having a "dent"..
Figure 2 - Final Drive Internal Gear Assembly
