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| | | | Joined: Jul 2010 Posts: 90 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 90 | Hi,
My clutch is due for change. The Burb is original and has a 283 and a three speed gear box. I came a across a new clutch that somebody bought wrongly so it's up for sale cheaply. However all the adv says is "11 inch clutch and pressure plate to fit small block Chevrolet 10 spline"
Question is if that will fit my Burb..
Cheers Dyna | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | the clutch size can be anywhere from 10 inches to 12... depends how the flywheel is drilled. Best to drop the transmission and match the clutch and pressure plate up at your local friendly auto parts supplier. | | | | | Joined: Jul 2010 Posts: 90 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 90 | the clutch size can be anywhere from 10 inches to 12... depends how the flywheel is drilled. Best to drop the transmission and match the clutch and pressure plate up at your local friendly auto parts supplier. Thanks for your reply but kind of hard to do that since there is no local US autoparts supplier in the south of London United Kingdom  .. Burbly Dyna Ps: Surely there must be a specific clutch for an all original 58 1/2ton burb.. | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | the "specific original" clutch could have been 10" - could also have been ordered with an optional HD 10.5", or if it was replaced in the past 50 years, it could have gotten the 11" - very unlikely it would have any other than those 3 ... the 10 spline is correct considering the fact that you have no assurance that the driveline has never had any work done, the best plan would be to pull the bellhouse and check - the engine is out of the truck isn't it?  Bill | | | | | Joined: Feb 2004 Posts: 29,850 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,850 | I'd suggest removing your original pressure plate and trying to match up the bolt holes with the potential replacement item. If the bolt holes align, it will bolt onto your flywheel. The big cast iron bellhousing on your Burb should accomodate either clutch- - - -later models with the small flywheel and the close-fitting aluminum bellhousing won't clear an 11" or 12" pressure plate. You might have to find the correct-depth throwout bearing to match the release fingers on the pressure plate. There are at least two different lengths of throwout bearing, and the design of the pressure plate release fingers will determine which one works right.
Jerry
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| | | | | Joined: Jul 2010 Posts: 90 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 90 | the "specific original" clutch could have been 10" - could also have been ordered with an optional HD 10.5", or if it was replaced in the past 50 years, it could have gotten the 11" - very unlikely it would have any other than those 3 ... the 10 spline is correct considering the fact that you have no assurance that the driveline has never had any work done, the best plan would be to pull the bellhouse and check - the engine is out of the truck isn't it? Bill Thanks for the clarification, yes the truck is out of the engine  so I can split it easily. May I ask is it the pressure plate surface diameter I should measure? Sorry never had a manual US car before.. Cheers Dyna | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | the pressure plate [the plate on it, not the bolt spread] will match the disc, they'd both be nominally 10, 10.5 or 11" ... if it really is original and never opened, it's likely to be 10", but the bolt spacing may still fit the 11" so that's the info you'd need off the item for sale
Bill | | | | | Joined: Jul 2010 Posts: 90 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 90 | the pressure plate [the plate on it, not the bolt spread] will match the disc, they'd both be nominally 10, 10.5 or 11" ... if it really is original and never opened, it's likely to be 10", but the bolt spacing may still fit the 11" so that's the info you'd need off the item for sale
Bill Ah ok got you thanks will see if I can get that info.. Cheers Dyna | | | | | Joined: Jun 2005 Posts: 388 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 388 | The 1958 Spec sheets seem to show that 10.5" clutch was standard for the smaller trucks with the 283. An 11" clutch came with RPO 227 with the V-8 in the smaller trucks. Does anyone know what RPO 227 was? The flywheels may be the same for both, but you need to make the measurements. Hoyt | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | RPO227 is 'heavy duty engine equipment' - from this 56 sheet it looks to me like flywheels would have accepted any offered clutch, the difference in the sizes would have been accomodated by using one size pressure plate case that accepts all 3 sizes of plate and disc Bill | | |
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