There is an old truck with a truck 2 sp inline trans mounted to the rear of a 40 truck 3sp trans. it is mounted with the stock rear end coupler. The rear of the box also has a coupler to a stock 40 rear. It seems fine and can be shifter back and forth. Anybody familiar with these? What are the ratios? This is a stock deal used to increase the speeds of heavy trucks on the highway. It is apparently a planatary transmission.
Factory inline overdrive
- Thread starter Andy
- Start date
rotorwrench
Well-known member
Brown & Lipe (BLC div of GM) made a lot of these. most folks call them a browny box.
sturgis 39
BANNED
Some of the early model "A" trucks had an auxliary tansmission behind the standard car three speed transmission. It was not an overdrive but an underdrive. There was a pedal on the flor to shift the auxliary transmission. I have thought of switching one end for end to make it an overdrive.
blucar
Well-known member
The gearing on many trucks of the '30's/40's/50's was altered by installing auxiliary transmissions behind the main box. The purpose of the aux transmissions was to provide lower and/or higher ratios, depending on the use of the trucks.
Many manufactures supplied these aux transmissions, they were commonly referred to as Brownies or Twin Sticks.
During the early '50's I worked in a shop that was located in a farming community. We used regular truck transmissions, either 3-4 speed adapted to fit with parts made up at the local machine shop. One truck we built was modified to run alongside of the first potato combine used in Idaho. The truck was a KB6 International, under 3/4 throttle you could walk faster than the truck would move in a plowed field.
Driving one of the old twin stick trucks took real skill, moving both feet, clutch, throttle and both hands a the same time. Not a job for sissy's....
Many manufactures supplied these aux transmissions, they were commonly referred to as Brownies or Twin Sticks.
During the early '50's I worked in a shop that was located in a farming community. We used regular truck transmissions, either 3-4 speed adapted to fit with parts made up at the local machine shop. One truck we built was modified to run alongside of the first potato combine used in Idaho. The truck was a KB6 International, under 3/4 throttle you could walk faster than the truck would move in a plowed field.
Driving one of the old twin stick trucks took real skill, moving both feet, clutch, throttle and both hands a the same time. Not a job for sissy's....
ajohn
Senior Member
I wonder if that would work.Might be worth a try! James