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Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars #1390081 12/28/2020 1:14 AM
Joined: Jan 2019 Posts: 328 FL P Philipj 'Bolter
Philipj 'Bolter P Joined: Jan 2019 Posts: 328 FL	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. Philippe Jeanneau

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390090 12/28/2020 2:12 AM
Joined: Mar 2004 Posts: 6,189 Hughesville, MD M Mike B 'Bolter
Mike B 'Bolter M Joined: Mar 2004 Posts: 6,189 Hughesville, MD	Clutch Facing thickness is between .137-.143" for the 10-3/4" clutch... Mike B Mike Boteler 1956 Chevy 3100 Resto Rod 1956 8400 Wrecker w/Holmes 525 1956 9200 Tractor w/Allison Automatic 1952 Willys M38 Army Jeep 1953 Willys M38A1 Fire Jeep 1978 Jeep CJ-5 Navy Jeep 1984 Jeep CJ7 +++++ Hughesville, MD

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390098 12/28/2020 3:40 AM
Joined: Jan 2019 Posts: 328 FL P Philipj 'Bolter
Philipj 'Bolter P Joined: Jan 2019 Posts: 328 FL	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... Last edited by Philipj; 12/28/2020 3:42 AM. Philippe Jeanneau

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390100 12/28/2020 4:20 AM
Joined: May 2015 Posts: 9,828 Eagle River, Alaska klhansen Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
klhansen Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 9,828 Eagle River, Alaska	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. Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. \| 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390326 12/29/2020 11:07 PM
Joined: Jan 2019 Posts: 328 FL P Philipj 'Bolter
Philipj 'Bolter P Joined: Jan 2019 Posts: 328 FL	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... Philippe Jeanneau

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390331 12/29/2020 11:47 PM
Joined: Aug 2018 Posts: 1,003 Saskatchewan 2 2ManyTrucks 'Bolter
2ManyTrucks 'Bolter 2 Joined: Aug 2018 Posts: 1,003 Saskatchewan	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

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390347 12/30/2020 1:01 AM
Joined: Sep 2001 Posts: 29,262 Jarvisburg, NC, USA tclederman Bubba - Curmudgeon
tclederman Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 Jarvisburg, NC, USA	Does your disc not have the "wear grooves" as shown on this one? Attachments 38-53 clutch discsa-104.jpg (37.34 KB, 61 downloads) Tim 1954Advance-Design.com 1954 3106 Carryall Suburban 1954 3104 5-window pickup w/Hydra-Matic The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390354 12/30/2020 1:19 AM
Joined: Aug 2018 Posts: 1,003 Saskatchewan 2 2ManyTrucks 'Bolter
2ManyTrucks 'Bolter 2 Joined: Aug 2018 Posts: 1,003 Saskatchewan	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

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390369 12/30/2020 1:55 AM
Joined: Jan 2019 Posts: 328 FL P Philipj 'Bolter
Philipj 'Bolter P Joined: Jan 2019 Posts: 328 FL	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... Philippe Jeanneau

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390385 12/30/2020 2:37 AM
Joined: May 2015 Posts: 9,828 Eagle River, Alaska klhansen Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
klhansen Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 9,828 Eagle River, Alaska	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. Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. \| 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1390388 12/30/2020 2:55 AM
Joined: Mar 2004 Posts: 6,189 Hughesville, MD M Mike B 'Bolter
Mike B 'Bolter M Joined: Mar 2004 Posts: 6,189 Hughesville, MD	Originally Posted by Philipj I measured everything again and got 0.142 or 3.61 mm, so it appears that I am still within specs... 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 Mike Boteler 1956 Chevy 3100 Resto Rod 1956 8400 Wrecker w/Holmes 525 1956 9200 Tractor w/Allison Automatic 1952 Willys M38 Army Jeep 1953 Willys M38A1 Fire Jeep 1978 Jeep CJ-5 Navy Jeep 1984 Jeep CJ7 +++++ Hughesville, MD

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1391247 01/04/2021 3:00 PM
Joined: Jan 2019 Posts: 328 FL P Philipj 'Bolter
Philipj 'Bolter P Joined: Jan 2019 Posts: 328 FL	Here are a couple shots of the clutch disc... Attachments thumbnail_IMG_8316.jpg (46.37 KB, 50 downloads) thumbnail_IMG_8312.jpg (65.48 KB, 48 downloads) Philippe Jeanneau

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1391256 01/04/2021 3:58 PM
Joined: Feb 2019 Posts: 4,100 Upstate NY Phak1 AD Addict & Tinkerer
Phak1 AD Addict & Tinkerer Joined: Feb 2019 Posts: 4,100 Upstate NY	Judging by the printing still visible on the disk face, its almost new! Phil Moderator, The Engine Shop, Interiors and Project Journals 1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum

Re: Clutch disc Thickness GM 3835453 1938-1953 Trucks/Cars Philipj #1391305 01/04/2021 9:57 PM
Joined: May 2017 Posts: 330 Minnesota, west of Minneapolis S sweepleader 'Bolter
sweepleader 'Bolter S Joined: May 2017 Posts: 330 Minnesota, west of Minneapolis	Flywheel behind looks new too. Mac :{) 1962 K10 short step side, much modified for rally 1969 T50 fire truck, almost nos, needs a few things

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