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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: Jul 2006 Posts: 187 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 187 | Does anyone know what the stock E-brake set up was on a 51' GMC 640? I have air brakes but can't find anything that looks like an E-brake. I think I need a manual.
'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.
| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Clutchheadstew,
Is there a spring brake unit piggybacked on your service brake chamber?
Stuart | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Clutchheadstew, In those days spring brakes were rare, I suspect it was probably equipped with a driveshaft parking brake, probably a "Tru-Stop" either a single or double sided type. Is there something on the driveshaft or the tranny or the auxilliary that looks like a large disc brake rotor? Hope that helps. | | | | | Joined: Jul 2006 Posts: 187 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 187 | Hey guys, I found a new in the bag 5000 Dual control valve kit behind the seat this afternoon. looks like a valve you can cut in to your air system and mount on your dash for park and emergency situations.This is what I'm used to seeing for E-brakes on air. 3B, nothing on the shaft,first place I looked. I also found out what that monster engine is 3B..... :mad: it,s a 534 super duty F**D in my first big GMC :hammering: what was someone thinking!
'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Clutchheadstew, I happen to know a guy who may be able to supply a proper engine for that truck, hope that helps. [P.S. how are you ever going to get the stink out of it?] | | | | | Joined: Jul 2006 Posts: 187 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 187 | Hey Bobb, I E-mailed you this morning concerning a engine change out. I don't think they make any thing to clean up this mess except putting something GM in it. I thought it was the ferret under the seat that I was smelling 
'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.
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