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Mod | | | Forums66 Topics128,138 Posts1,056,441 Members48,441 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Mar 2016 Posts: 42 'Bolter | | 'Bolter Joined: Mar 2016 Posts: 42 | Hi legends, I’m building a 1.5 ton truck, but to get enthusiast registration I need to lower my GVM and as it seems disc brakes are easier on the 3/4-1ton axle I’m looking at options for that.
So my questions is a multi pronged
From what I can work out the TSM and nostalgia SIDS use early C20 calipers (I love this idea because if I make an issue parts are available even if tsm / sids stop doing them but what is the doc they are using? Is it something else machined and modified?
Is there a way of doing Disc brakes aside from these two kits?
Thanks heaps
Yeti? | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Yeti, 'Doc', is that meant to be disc? TSM used C20 and similar discs, however they are not rated for 1.5 ton, unless the GVW falls in the 3/4-1 ton axle range. The disc used depends on bolt pattern, do you have 8 on 6.5" or 5/10 on 7.25" or something else?
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: Sep 2010 Posts: 1,710 back yard wrench turner | | back yard wrench turner Joined: Sep 2010 Posts: 1,710 | I put discs on my '38 1 ton. Mine are 6 lug. I used late 70's parts. Caliper is C10, rotor is K10. I fabbed up the bracket using plywood to get to the final rendering, then cut out of 5/16 steel.
Wayne1938 1-Ton Farm TruckStovebolt Gallery Forums1989 Silverado 1996 Mustang GT convertible When I die, I hope she doesn't sell everything for what I told her I paid for it! | | | | | Joined: Mar 2016 Posts: 42 'Bolter | | 'Bolter Joined: Mar 2016 Posts: 42 | Yeti, 'Doc', is that meant to be disc? TSM used C20 and similar discs, however they are not rated for 1.5 ton, unless the GVW falls in the 3/4-1 ton axle range. The disc used depends on bolt pattern, do you have 8 on 6.5" or 5/10 on 7.25" or something else?
Ed To make it work I’m going 8 on 6.5, I understood this lowers my capacity considerably and this actually suits
Last edited by TheYeti; 06/07/2020 4:42 AM.
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