Labor Day Putting down your wrenches or time for MORE wrenching? 
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| | | Forums66 Topics128,004 Posts1,055,265 Members48,418 | | 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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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jul 2006 Posts: 187 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 187 | Does anyone know what a '54 8-speed automatic out of a ex-army GM 6x6 bolt up to besides the original gas 6-banger? Was it a GM bolt pattern? Are they any good? Any Korean Vets out there that drove these things? Thanks.
'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: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | I believe they were introduced after the Korean conflict, ended in 1953. I drove them in 1959 and 1960 and they held up well to abuse. I thought they were just a hydro with a low range and a high range transfer case, in other words a fourspeed with straight drive for the high range and a reduction gear for the low range. There was no split shifting. Don't know about the bolt pattern. | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | There is one of those that shows up every year at the ATHS show in Brooks. The following are not dial-up friendly photos. The card descibing the transmission is here: Twin Hydra Descriptoin Pictures of that truck and the transmission are available in this folder: http://www.oldsub.com/images/2007/08/25_ATHS_Brooks/ You may have to poke around a little to find them.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more... It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Jul 2006 Posts: 187 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 187 | Double Trouble, great name.  Thanks for the dial-up OldSub. I'd like to repower my '51 GMC 640 and the automatic looked like a viable option if I could find a engine/trans application. Baldy your right on the date, I should have known I was born in '54. Thanks guys.
'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: Sep 2005 Posts: 191 Shop Shark | | Shop Shark Joined: Sep 2005 Posts: 191 | I looked at one of them in the junkyard the other day, it had a 270 in it. That deuce and half was cool but the automatic ruined it for me and the junk yard man LOL. He said yeah it's a good truck but has that stinkin' automatic in it. | | | | | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | It should have had a 302 in it IIRC. I never saw a military duece and a half of that era that was anything but an automatic while I was in the Army. The five ton Diamond/Reos had five speed manual transmissions. | | | | | Joined: Sep 2007 Posts: 75 Shop Shark | | Shop Shark Joined: Sep 2007 Posts: 75 | Clutchheadstew, if you buy that army automatic, I hope your real name is Job because you will have to be a very patient driver. My recollection fo those things shift, shift, shift, shift, etc. Up, down, down again, then up again, then down, down, up, up, down, etc. Them was the most agravating things I ever came across in the truck world. I never understood why the Army wanted such a truck but I guess it was cheaper than teaching boys to doubleshift.
Jay | | | | | Joined: Jul 2006 Posts: 187 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 187 | Wow, thanks guys. Looks like I'm running as fast as I can away from this truck. Thats what I expect from my Brothers and Sisters here at the Bolt, the honest truth!....Thanks, Rick
'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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