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Jul 21st, 2025 | | | | Joined: Feb 2012 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2012 Posts: 73 | Hello:
It's getting time to replace my clutch. I haven't got it apart yet, so can't see what's in there. Catalogues show both a 10" and an 11 3/4" clutch for my truck. Anyone know which one is right? It's a 235 with 3 speed transmission.
Thanks!
Glen | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Usually you need to pull it to get the right one. There are several options. You might get a good idea by removeing the bottom cover & measureing.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Mar 2004 Posts: 6,189 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,189 | My Parts Book says the 10" is standard duty and the 11" is heavy duty, there is no mention of 11-3/4". The 1965/66 C10-30 have an 11-7/8" HD Clutch. Hope this helps, Mike B  | | | | | Joined: Feb 2012 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2012 Posts: 73 | Thanks guys. I was hoping not to have to crawl under till it was time to do the tear down, but perhaps that isn't the case.
Perhaps what I thought was 11 3/4 is actually 11. It was also cheaper! | | | | | Joined: Mar 2004 Posts: 6,189 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,189 | The bigger clutch won't hurt, it may be a little grabbier than the smaller one. How do you use your truck, do you carry heavy loads or pull a trailer? If so get the 11". If only light duty the 10" will be fine. Mike B | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | You have to use the size that the flywheel is designed for.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Feb 2012 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2012 Posts: 73 | Ah... So 235's had more than one flywheel clutch surface spec? | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | "Ah... So 235's had more than one flywheel clutch surface spec?"
Since 1941?
Any flywheel since then would fit any 235 (I think).
You might never know what year/engine your flywheel is out of. It could be from most 216s (maybe any 216, I think), any 235, or any 261.
That is why Wrenchbender early-on above suggested: "Usually you need to pull it to get the right one."
And later on: "You have to use the size that the flywheel is designed for."
This is what we all have to deal with - you know know what size you need until you know the actual size you have in your truck. Ain't life fun?
| | | | | Joined: May 2005 Posts: 8,988 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,988 | | | | | | Joined: Feb 2012 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2012 Posts: 73 | Thanks again guys. Yes, life is fun with these old trucks. | | |
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