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04-07-2018, 06:56 PM | #1 |
Registered User
Join Date: Feb 2017
Location: Bloomington,IN
Posts: 10
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Clutch and flywheel question
Hey guys found a 73 1500 with a 350 in it and auto. I also have a 69 c30 no motor just a 4 speed. I know I need a 168 tooth flywheel. I just don't know what size clutch I need. I'd prefer a bigger one since it's going in a one ton. Any way to tell a difference when ordering?
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04-07-2018, 08:09 PM | #2 |
Senior Member
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,855
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Re: Clutch and flywheel question
The 350 s that I've seen all had 12 inch clutches standard.
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent. |
04-07-2018, 08:15 PM | #3 |
Registered User
Join Date: Mar 2018
Location: Kuna, Idaho
Posts: 117
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Re: Clutch and flywheel question
Should be able to take your trans model and call a trans supply house and get your options based on year and chassis along with trans model. Don't quote me but I think some of the 1 tons could be had with a severe duty 14 inch. I could be wrong on that though.
Dan
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Forgive my typos, big fingers and little Android digital keyboard....what a mess 06 GMC Sierra crew cab Z71 DD leveling kit, 34's, bumper, LED lighting. Still doing stuff to it. 67 El Camino Custom 300 Deluxe. In progress. 55 GMC 371 2 1/2 ton. Upcoming project. |
04-07-2018, 09:53 PM | #4 |
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Join Date: Jul 2014
Location: North-central Virginia
Posts: 1,099
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Re: Clutch and flywheel question
Keep in mind that a 12" clutch actually measures 11-7/8". This had me confused quite a bit when I was replacing my clutch.
The 12" clutch goes on the 168 tooth flywheel. There's no extra space on the flywheel with that clutch. I can't imagine a 14" clutch fitting there. The summit racing catalog lists 3 or 4 manufacturers of clutches for sbc/bbc engines. Each manufacturer lists 3 different strengths of clutch kits. Frequently, a stock replacement clutch, a higher clamp force clutch, and a double disc clutch. I got a stock replacement Ram clutch for my 350. It worked excellent. Pay attention to the spline count of your input shaft when ordering. |
04-07-2018, 11:17 PM | #5 | |
Registered User
Join Date: Mar 2018
Location: Kuna, Idaho
Posts: 117
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Re: Clutch and flywheel question
Quote:
Dan
__________________
Forgive my typos, big fingers and little Android digital keyboard....what a mess 06 GMC Sierra crew cab Z71 DD leveling kit, 34's, bumper, LED lighting. Still doing stuff to it. 67 El Camino Custom 300 Deluxe. In progress. 55 GMC 371 2 1/2 ton. Upcoming project. |
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