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I need to replace the clutch in my 78SA L-82. What is the clutch size, 10.4" or 11"? I see these two sizes when I'm shopping for an replacement.
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Unless you are the original owner, and know for sure the clutch has never been changed, there's no way to be certain what size it has in it now. The L82 should require the larger(11") disc, but...who knows what it actually has in it now?
Then again, in '78, McClellan was doing everything he could to lower the weight of the car, so it may have come thru with the smaller set-up.
I can dig thru the parts manual and see if it is listed...
Then again, in '78, McClellan was doing everything he could to lower the weight of the car, so it may have come thru with the smaller set-up.
I can dig thru the parts manual and see if it is listed...
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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I think that if you have the large harmonic balancer, you will have an 11 inch clutch, if you have the skinny one it will be the 10.25,,rd
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Parts manual shows 78 ONLY, without SPHP engine(L82), part #3841673 clutch pressure plate, which is 12 31/64".
'77-'78 w/sphp(L82), part #3884598, which is 11'.
Interesting to note, the L-88 cars used the smaller, 10 1/4" disc...the ZL1 used a dual disc, 10 1/2" set-up...
'77-'78 w/sphp(L82), part #3884598, which is 11'.
Interesting to note, the L-88 cars used the smaller, 10 1/4" disc...the ZL1 used a dual disc, 10 1/2" set-up...
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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in Forum: C3 Engines, Driveline and Handling
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