The Stovebolt Site Forums The Shop Area Name that part ... Auxiliary Transmission but what?

Had this since the mid 80s and finally got the engine and running gear out of its home to make room for the 702 install. Its an auxiliary transmission thats very old. It has no mnf logos or tags and the only stamped number is on the top cover, 251359. It has a 4 bolt pto cover on the left side and a monster bronze plug on the bottom, 3" dia give or take.

Welcome to Stovebolt Jrpmccoy! Can you give more info on what this came out of, or did you get it like it is with no other history?

The stamped "251359" most likely is a serial number stamping. I did notice from your pictures there are casting numbers on the bottom of the main case and huge drain plug. Maybe you can clean those up and share more info to help try and ID the unit.

The most common manufacturers of auxiliary transmissions were Brown-Lipe ("Brownie") and Spicer. Those companies eventually merged, I believe. Timken also made some auxiliaries. Way back in the dark ages, a company named "Truxtell" made transmissions and 2 speed rear axles for Ford Model T, Model A, and Chevy called a "Tip-Toe Matic".

The Brownie style driveline mounted transmissions are all "crash box" types, no synchronization. It takes a lot of practice to learn to shift one without some serious gear grinding. The two shift rails in your photo probably mean it's a 3 speed, Under/direct/over gears which allows you to split each main transmission gear into three different ratios. Fun stuff! The first big rig I learned to drive was a 1958 B-73 Mack with an 855 cubic inch 262 Cummins Diesel engine, a 5 speed main box and a 3 speed auxiliary- - - -15 forward speeds and two shift sticks to play with!
Jerry

I pulled it out of an 1926 International 2 ton Speed truck. The truck was heavily modified for logging and had a very old Buick straight 6 mated to what I think was the orginal Internatiinal tranny. Mounts were fabricated to hold the auxiliary and bolted directly to the frame.
As far as casting numbers, they are in 5 places but I believe are only relevant to each part. The lower fron and rear 4 bolt bearing caps are the same part and have tje same casting number. The main housing casting number is unreadable as is the top casting that houses the shifting rods. Interesting enough there casting with a small logo which appears to be an H in an oval. This is consistent on the plats that hold the bearings even with different casting numbers.

GMC trucks of that era used the Buick inline six. It put out 71 hp which was pretty good for the time.

Thanks, I had two of these trucks and they had 4 cylinder industrial engines originally. I sold the other truck and axles along with the buick engine from the one I kept. I kept the brownie because I thought Id put it in again but got a fuller road ranger with air shift and overdrive mod. Also realized that a 702 V12 would toast the auxilary in no time with 600ft lbs of torque. I am trying to find out what this is so I can ultimately sell it.

Jrpmccoy - just to let you know, with your next post, you'll be out of moderation and your posts will go up right away. And you can do Private Messages (PMs).

Welcome to Stovebolt.

Thanks 🙂

Also unique is the bolts themselves, they are hex heads but have 7/16 thickness. You can see that in the last picture I posted. I have worked on plenty of stuff from the 40s on up and have never come.across this. Between the casting logo, big bronze drain plug and now the bolt heads this should be readily identifiable. All the folks that had old scrap yards around here are long gone.