Bonneville V6-231 3.8L VIN 3 SFI (1988)
IMPORTANT:
If ordering a new 1-2 or reverse band, the correct band apply pin must be used with the band. The correct band apply pin is
not included with the new band service package(s) (that includes an instruction sheet about the non-selective band apply pin
band). The proper band apply pin must be ordered separately.
NOTICE:
If replacing a 1-2 band with the new 1-2 band listed in this bulletin, the 1-2 band stop (on models so equipped) must be removed
prior to installing the band. The 1-2 band stop, if not removed, would cause the new 1-2 band to remain partly applied, distressing
the 1-2 band. Reference Pontiac Service Bulletin 90-7-34 issued 4/90.
IMPORTANT:
If replacing reverse band assembly, the new band also has the new friction material that will help decrease reverse
engagement concerns. Reference Service Bulletin 90-7-40 issued 5/90.
DATE OF PRODUCTION CHANGE:
Beginning July 2, 1990 (Julian Date 183) , all 1991 HYDRA-MATIC 4T60 transaxles were built with the new 1-2 and reverse band assemblies.
SERVICE PARTS INFORMATION:
The new bands will replace the previous bands.
Parts are currently available from GMSPO.
SERVICE MANUAL REFERENCE:
Refer to the appropriate Service Manual for proper disassembly and assembly procedures. The 1991 Service Manual shows the procedure to measure the
1-2 and reverse band apply pins and should be disregarded.
