Lt1 clutch replacement?
Thread Starter
Racer
Joined: Apr 2003
Posts: 383
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From: triangle NC
Lt1 clutch replacement?
Has anyone replaced there own clutch? I recently bought a 94 and it needs to be replaced. I remember reading somewhere before I bought the car that the lt1's used a dual mass flywheel and that there were aftermarket companies using the 4+3 flywheel and clutch with the ZF. Any suggestions? Also can the stock wheel be resurfaced? Just wanted some input before I tear it apart. :grouphug:
Racer
Joined: Aug 2002
Posts: 253
Likes: 0
From: Strongsville Ohio
Re: Lt1 clutch replacement? (87Z-ya)
The dual mass should not be resurfaced. You have three choices, reuse it if it is still good, replace it with another dual mass, or convert it to a single mass, and there are many choices on the latter. I have mine apart now converting it to a single mass. I chose to install an LT-1 F body flywheel ( .090 machined off the face ), F body disc and a stock Corvette p/plate. If you use a new stock p/plate it will come with a new release bearing. I chose to replace the engine rear main seal, trans front and rear seals, U joints and a Ripper shifter. I wanted to do everything I could to lessen the odds of future problems, oil leaks ect.
Hope this helps
Hope this helps
Thread Starter
Racer
Joined: Apr 2003
Posts: 383
Likes: 0
From: triangle NC
Re: Lt1 clutch replacement? (Stingray1970)
Why did you have the new wheel Resurfaced? I plan to use a centerforce clutch. I just have no clue about the flywheel. I have a neutral balance, one piece rearmain, 168 tooth wheel sitting in my garage from a pick up. Is the lt1 vette clutch a push or pull type? Is the input shaft 26 spline?
Racer
Joined: Aug 2002
Posts: 253
Likes: 0
From: Strongsville Ohio
Re: Lt1 clutch replacement? (87Z-ya)
The F body LT-! flywheel is .090 too thick to be used in a Corvette application, so .090 has to be machined off for proper fitment. This is a necessity with the F body flywheel. As to the truck flywheel being the same, I don't know. The casting number on my LT-1 flywheel is 10125380A. I personally wouldn't chance it. If you are going to convert it to a SM the flywheel will be a machined F body or an aluminum Fidenza. I haven't been satisified with aluminum in the past. BTW the SM weighs 38lbs and the maachined F body weighs 19 lbs. The disc is a 26 spline and the p/plate is the pull type.
Gene
Gene
Burning Brakes
Joined: Apr 1999
Posts: 1,161
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From: Texas
Re: Lt1 clutch replacement? (Stingray1970)
Another option is to go with the aluminum F/W from Carolina Clutch. I have one at home on the garage floor with a new sprung hub disk but no time to install it just yet. I can also attest to the folly of resurfacing the dual mass. Mine intermittently growls like an old junk yard dog at a stop light. On the other hand I've heard that as a general rule if you don't resurface it might chatter after install. Mine only had 69K on it, I usually get about 150 - 160K out of a clutch so I decided to try it. Worked ok for about 2000 miles then started makin' weird noises.
good luck
dr
good luck
dr
Instructor
Joined: May 2003
Posts: 104
Likes: 0
From: Ocean City MD
Re: Lt1 clutch replacement? (87Z-ya)
I just put a spec stage III clutch with a single mass aluminum flywheel....I did it in drive Way (not by choice) with simple hand tools and a torq wrench.....any way I agree with not resurfacing the flywheel....If you call spec you can by a complete single mass set-up ready to bolt on....let me tell you the difference is awsome, I did not believe all the hype until I had one....for what it is worth.
