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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Clutch advice

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Old Feb 1, 2022 | 03:16 PM
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konaphil
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Clutch advice

I have a 1993 ford F350 duelly, with a 12 foot steel flatbed. The engine is a 5.8, with the ZF5 standard trans. The clutch is chattering when engaged,, and slipping under load. I changed it once before, it's a 10 inch. I'm thinking the clutch really should be an 11 inch, but I need advice. I would imagine it may just require upgrading the flywheel ( not that its easy to do ! ) Should I just get the best 10 inch, or upgrade? Any, and all advice appreciated, including brands, sources, etc, etc. Thanks.
 
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Old Feb 1, 2022 | 03:21 PM
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From: Chillicothe
Did you just put the new clutch on a used flywheel? That could be part of the slipping and chattering issue.
Second i think you can upgrade no problem to an 11 without any modification.
Or find a good aftermarket clutch from ram or centerforce.
 
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Old Feb 2, 2022 | 11:27 PM
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I was under the impression the V8s all used an 11"...the I6 was drilled both ways (10/11). I think my 7.3DI has a 13" now with a SMF kit.

Either way, I would buy an entire Luk setup and a fresh flywheel unless you have a good machinist to surface it for reasonable.
 
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