Bonneville V6-3800 3.8L (1991)
Clutch: All Technical Service Bulletins
A/T - Delayed Engagement In Drive/Reverse
Bulletin Number:
92-7-4
Reference Number:
107105
Publish Date:
11/91
Subject:
DELAYED ENGAGEMENT IN DRIVE/REVERSE
(REPLACE INPUT CLUTCH PISTON OUTER SEAL)
Models
Affected:
1991-92 6000, BONNEVILLE, GRAND PRIX
AND TRANS SPORT MODELS W/4T60/4T60E
The above condition could be caused by a rolled or cut input clutch piston outer seal. The initial comment is often a delay in drive cold. The condition
will sometimes develop into a no/delay drive or reverse cold and delay hot over a 2000-5000 mile range. If this condition is encountered, it is
recommended that the input clutch piston outer seal be replaced.
NOTE:
An air check of the piston as a diagnostic aid could be misleading.
Refer to the service manual diagnostic section for other causes of delayed engagement. GM Powertrain is currently performing a root cause analysis on
this condition.