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| | | | Joined: Oct 2017 Posts: 214 'Bolter | | 'Bolter Joined: Oct 2017 Posts: 214 | Will either a 9" or 10" clutch bolt up to my '53 flywheel as long as it comes with the proper pressure plate? I see 9" were used up to '53 and 10" for '54 and later 1/2 tons. Should be original 6v/stomp start flywheel setup.
Thanks,
1953 Canadian GMC 9314 w/ (factory) Chevy 235
| | | | | Joined: Oct 2017 Posts: 214 'Bolter | | 'Bolter Joined: Oct 2017 Posts: 214 | Thanks. I can get a 10” clutch kit for cheaper than a 9”, that’s why I ask. I’m going to get a new one and have the flywheel machined for the T5 conversion that I want to do this year.
1953 Canadian GMC 9314 w/ (factory) Chevy 235
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | I am having a hard time editing posts, so I deleted it (above).
I think that the flywheel has mounting holes to match the diameter of the clutch assembly (the clutch disc and the pressure plate).
Wait to hear from others. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | The flywheel bolt pattern for a 9" pressure plate is different then for a 10" pressure plate.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | One can always drill a new bolt pattern in the flywheel.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Oct 2017 Posts: 214 'Bolter | | 'Bolter Joined: Oct 2017 Posts: 214 | Thanks guys, I don't want the 10" bad enough to redrill the flywheel. I'm good with the 9"
1953 Canadian GMC 9314 w/ (factory) Chevy 235
| | | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | Measure the contact face of the flywheel and see what that is. The 55-57 235 flywheels for example (not the HD versions) will measure 10 inches yet they came from the factory with a 9.5 inch clutch. Pressure plate measures the same. So you can use a 10 inch clutch plate. So after measuring, if you have say 10 inches on the flywheel, next measure your pressure plate and see where you are at. If the pressure plate you are using with the 9 inch clutch does not measure 10 inches, then you need to find one that is 10 inches and will bolt to the flywheel.
Just asking here, how much difference is there in the cost of a 9 inch vs 10?
Mike
| | | | | Joined: Oct 2017 Posts: 214 'Bolter | | 'Bolter Joined: Oct 2017 Posts: 214 | Not much as the clutches don't cost much to begin with. One website, $20-30 difference between full kits. Some have the 9" disc only as the cheaper option. I just like the idea of the bigger clutch.
1953 Canadian GMC 9314 w/ (factory) Chevy 235
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