ChrisLS1Bird
08-09-2003, 09:35 AM
Hey guys, I have a question. Were the shift forks in the '02 T56 LS1 cars upgraded/stronger than the shift forks in the earlier T56 LS1 cars? I found this technical service bulletin which seems to allude to a revision:
Bulletin No.: 01-07-29-003A
Date: May, 2001
Subject: Transmission Jumps Out of 3rd Gear (Replace Shift Fork, 3-4 Synchronizer Assembly, 3rd Gear Blocker Ring and 3rd Speed Gear)
Models:
1999-2000 Chevrolet Camaro
1999-2000 Pontiac Firebird
with Manual Transmission (RPO MM6)
This bulletin is being revised due to a change in part numbers. Please discard Corporate Bulletin Number 01-07-29-003 (Section 07 - Transmission/Transaxle).
Condition: Some owners may comment that the transmission jumps out of 3rd gear.
Cause: Condition may be caused by inadequate travel of the 3-4 synchronizer assembly due to the 3-4 shift fork being out of specification or bent.
Correction
Notice : Please review the appropriate section of the Transmission Unit Repair Manual for correct disassembly and assembly instructions. When performing this bulletin, ALL parts listed need to be replaced. The condition originally occurs because of the 3-4 shift fork being out of specification or bent. This eventually results in damage to the synchronizer assembly, the blocker ring and the speed gear. Replace the 3-4 synchronizer assembly, the 3rd gear blocker ring, the 3rd speed gear and the 3-4 shift fork.
That 3-4 shift fork sounds problematic. Did Tremec go ahead and start putting better stuff (i.e. steel shift forks) in the T56 for 2001+ models?
Bulletin No.: 01-07-29-003A
Date: May, 2001
Subject: Transmission Jumps Out of 3rd Gear (Replace Shift Fork, 3-4 Synchronizer Assembly, 3rd Gear Blocker Ring and 3rd Speed Gear)
Models:
1999-2000 Chevrolet Camaro
1999-2000 Pontiac Firebird
with Manual Transmission (RPO MM6)
This bulletin is being revised due to a change in part numbers. Please discard Corporate Bulletin Number 01-07-29-003 (Section 07 - Transmission/Transaxle).
Condition: Some owners may comment that the transmission jumps out of 3rd gear.
Cause: Condition may be caused by inadequate travel of the 3-4 synchronizer assembly due to the 3-4 shift fork being out of specification or bent.
Correction
Notice : Please review the appropriate section of the Transmission Unit Repair Manual for correct disassembly and assembly instructions. When performing this bulletin, ALL parts listed need to be replaced. The condition originally occurs because of the 3-4 shift fork being out of specification or bent. This eventually results in damage to the synchronizer assembly, the blocker ring and the speed gear. Replace the 3-4 synchronizer assembly, the 3rd gear blocker ring, the 3rd speed gear and the 3-4 shift fork.
That 3-4 shift fork sounds problematic. Did Tremec go ahead and start putting better stuff (i.e. steel shift forks) in the T56 for 2001+ models?