1991 WC T-5 to LT1 Swap
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Joined: Sep 2006
Posts: 9
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From: Houston, Texas
Car: 1991 Camaro RS
Engine: LT1
Transmission: WC T-5
Axle/Gears: Stock 2.73
1991 WC T-5 to LT1 Swap
Hi there!!! I had a technical question for you guys if you could help me out. I am doing a similar swap as many you have completed. I have a 1991 Camaro that had a 305 TBI engine with the WC T-5 transmission. The question I have is in regards to the clutch fork necessary to perform the swap. I purchased a LT1 flywheel and SPEC stage 1 clutch for the T-5 LT1 set-up. The problem at the moment is that the stock clutch fork I have is not wide enough to go on the throwout bearing and the one they gave me from the dealer is not long enough. Which clutch and clutch fork set-up did you guys use in your swap? Thanks!!!
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Posts: 539
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From: Huntsville, AL
Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Are you installing a LT-1 and using your existing T-5 tranny? If thats the case you need to reuse your old T-5 flywheel, and use a T-5 clutch, pressure plate, clutch fork and throw out bearing. The T-56 stuff wont work on a T-5
Thread Starter
Junior Member
Joined: Sep 2006
Posts: 9
Likes: 0
From: Houston, Texas
Car: 1991 Camaro RS
Engine: LT1
Transmission: WC T-5
Axle/Gears: Stock 2.73
The T-5 flywheel and clutch will mount to the LT1? I was told the amount of teeth on the stock 91 T-5 flywheel will not adapt to the 94 LT1 I am installing. Is this a false?
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iTrader: (2)
Joined: May 2003
Posts: 539
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From: Huntsville, AL
Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Both flywheels are 153 tooth, and both motors are 1 piece rear main seal. it will work. the difference is the clutch diameter T-5= 10.4" T-56= 11.0".
Thread Starter
Junior Member
Joined: Sep 2006
Posts: 9
Likes: 0
From: Houston, Texas
Car: 1991 Camaro RS
Engine: LT1
Transmission: WC T-5
Axle/Gears: Stock 2.73
Ok, so the flywheel I purchased will be put into use. That's good because of the high mileage on the T-5 I am not sure how many times it has been resurfaced. My shadetree mechanic said that the problem he is having right now is that the throwout bearing on the clutch I bought is too wide for my existing T-5 clutch fork. I tried buying a new fork from the dealership and they gave me the one for the T-56 which fit the throwout bearing, but was too short. He said that he also "stabbed" the engine with the flywheel and clutch mounted on it and it sat in fine other than the problem with the clutch fork. I recall when I bought the clutch and the flywheel from the parts store that I researched the number spline on the input shaft of my T-5. Maybe it is the right clutch with the wrong throwout bearing....is that a possibility? I will get the measurements for the clutch I bought ASAP.
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iTrader: (2)
Joined: May 2003
Posts: 539
Likes: 3
From: Huntsville, AL
Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Sorry I guess I did not make it clear in the last post the LT-1 T56 flywheel will not work with your T5 Transmission. However the T5 flywheel will work with the LT-1 motor
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