K 1500 Truck 4WD V8-379 6.2L DSL VIN J FI (1992)
Figure 1
Production Date:
(Figure 1) Starting August 21, 1991 (Julian Date 233) all HYDRA-MATIC 4L80-E/4L80-EHD transmissions were built with the
new spacer plate and gaskets.
Important
ALL NEW SPACER PLATES AND GASKETS MUST BE USED TOGETHER.
New plates and gaskets must be used with the new case to improve stability.
New plates and gaskets can be used with old case and will function, but will not improve stability.
To improve stability on units built prior to Julian Date 233, reference Corporation Bulletin 177110R (GMC Truck Bulletin 91-7A-116, published August
1991) before any S.R.T.A. consideration. Parts are currently available at GMSPO.
