A/T - Delayed Forward Engagement/Burnt 3-4 Clutches
DATE: 1996TECHNICAL BULLETIN # 334
TRANSMISSION: 4L60 & 4L60-E
SUBJECT: Delayed forward engagement, burnt 3-4 and/or overrun clutches
APPLICATION: GM
4L60 and 4L60-E
These conditions can be caused by low line pressure or worn internal parts. However, if none of these problems are found, check the stator support for the oil passage sleeve rotating in the support (figures 1 and 2).
Using a 4 mm allen wrench, insert the wrench into the TCC release hole (figures 3 and 4). If the wrench does not drop into the feed hole, the sleeve has rotated and blocked the oil passages, and the stator must be replaced.