The Stovebolt Site Forums The Parking Lot Big Bolts Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars

Would anyone know the thickness of a new clutch disc, in this case GM 3835453 (10-3/4") fitted to trucks and cars between 1938-1953. Thank you.

Clutch Facing thickness is between .137-.143" for the 10-3/4" clutch...

Mike B

Hello Mike,

My clutch disk thickness is between 0.330-0.333 or (8.38-8.45mm) You can still see some numbers WFI 101059? Wonder if it is even the right disk. Somewhere I saw that a clutch disk for a 235 engine has a light blue line painted for identification... This one has light blue paint on one side of it, and now I wonder if someone thought it would be an upgrade...

Your measurements are in the 3.47 to 3.63mm, that is quite a difference... In which case, I probably should just leave it alone and only replace the throw out bearing just to be safe...

There's a difference between clutch FACING thickness and disk thickness. So Mike's number would be doubled (facing on each side) plus the thickness of the metal disk backing.

Thank you for the very important clarification... I measured everything again and got 0.142 or 3.61 mm, so it appears that I am still within specs...

How thin would a worn out clutch be?
For future reference
If I measure mine I would like to know if I’m at 60% or 20% for instance
Thanks
-s

it has grooves, so when the grooves are gone that is considered end-of-life?
not much life in these things i guess, don't ride the clutch
-s

Mine has grooves also, but they're not very deep... I might just get a new disk provided I can find one that is made in U.S.A...

If the rivets are shiny from rubbing on the flywheel or pressure plate, then the disk is definitely worn out. If there isn't much depth to the rivet heads left, I would replace the disk.

That tells me you have a new or almost new clutch in your hand as a new face can range in thickness from 0.137" to 0.143".

Mike B

Here are a couple shots of the clutch disc...

Judging by the printing still visible on the disk face, its almost new!

Flywheel behind looks new too.