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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: Nov 2005 Posts: 5 Junior Member | | Junior Member Joined: Nov 2005 Posts: 5 | Hello guys, I have a "68 1 ton 4x4 that we took the gas engine out and put in a International 6-cylinder turbo charged diesel engine. I have a Brownie box model 5531A that has a .73 overdrive and I'm looking for a .81 overdrive. Does anybody want to trade gears/boxes or sell a set of .81 OD gears? Please email me if your able to help [email protected]Thanks for your time Mike | | | | | Joined: Feb 2005 Posts: 37 Junior Member | | Junior Member Joined: Feb 2005 Posts: 37 | Do you mean the Spicer 5831A? 1.54/1.0/0.73
I've never heard of the 5531A, Google turned up nothing.
1969 GMC K/2500 (w.i.p.)
| | | | | Joined: Feb 2005 Posts: 37 Junior Member | | Junior Member Joined: Feb 2005 Posts: 37 | Well thank you, I just learned about a new Brownie I've never heard of before.
Looks to be physically larger than the 5831.
Sorry I didn't help at all.
1969 GMC K/2500 (w.i.p.)
| | | | | Joined: Nov 2005 Posts: 146 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 146 | hahaha i could tell you were in california by the lucern milk crate in the background of the pic. and the ductal pipe just screams hard labor, which i hate doing......sorry. just had to mention that :p | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | I couldn't take my eyes off the PTO winch. That's quite a find.
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: Nov 2005 Posts: 5 Junior Member | | Junior Member Joined: Nov 2005 Posts: 5 | OldSub, I bought the winch for scrap price $20. And he insisted on cutting it out himself. I'm going to mount it on the back to match the smaller mechanical winch on the front. | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Mike Mc,
What would that brownie have been installed on? Where would I look for an item like that?
Stuart | | | | | Joined: Sep 2005 Posts: 254 Shop Shark | | Shop Shark Joined: Sep 2005 Posts: 254 | i'm kinda confused on the tranny so from what i read that tranny is a 3 speed and 1st gear is 1.52:1? same goes for the other one with the 1.54:1 forgive me if i'm reading that wrong but if i am right wouldn't you need some extremly short gears to run that trans?
Nate | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Nate,
The item in question is a auxiliary transmission, know as a brownie or splitter. It mounts in back of the main transmission. It allows the operator to split each main gear by as many times as the brownie has gears! Take another look at the picture..you can see the input and output configuration plus the remains of some mounting brackets.
Stuart | | | | | Joined: Nov 2005 Posts: 5 Junior Member | | Junior Member Joined: Nov 2005 Posts: 5 | atomarc, I found the brownie in a '50 1 1/2 ton chevy dump truck.
Old Iron, I'm wanting the use the direct and over drive. I will only need under drive to get me going when loaded. My transmission has a 900rpm drop when shifting. The brownie .73 is a 650rpm drop and the .81 is a 450rpm drop. If I had the .81 OD gear it would split each gear right down the middle.
I guy told me the OD gears can be switched for a different ratio. Hopefully I have that option.
You guys want to C some pics of my truck? It's kinda ugly. | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Mike,
Are you going to use this box or is it in the "out" basket?
Stuart | | | | | Joined: Nov 2005 Posts: 5 Junior Member | | Junior Member Joined: Nov 2005 Posts: 5 | atomarc, I would like to use the brownie box to split the transmission. I also have my eye open for a 13 speed trany or a old Mack 15 speed twin stick. The diesel in the truck is only a 140HP so I'm wanting more than a 5 speed. Also it would be fun to have a brownie or twin stick.
Mike | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Mike, If you find an extra brownie laying around, I would be interested.  Stuart | | | | | Joined: Sep 2005 Posts: 254 Shop Shark | | Shop Shark Joined: Sep 2005 Posts: 254 | ya i wasn't really paying much attention cause after i posted it i seen the aux. tranny and was like ah crap now i just make myself look completly stupid would like to get an older 2 ton truck for a car hauler and have the split shift but don't really like the sound of a 2 speed rear end (don't sound to reliable) and the brownie aux. trans sounds like a really good idea
Nate | | |
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