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'75 4speed want to add overdrive

Discussion in 'Chevy Trucks' started by collomzh, Mar 24, 2003.

  1. collomzh

    collomzh Junior Member
    Messages: 2

    I have a '75 C10 with the 1low 3 high trany. I love it but i want to get better than 9mpg. I am installing multipoint efi from Edelbrock but want to add a <1 overdrive.

    Does anyone know of an add on for this tranny? I thought that I had read about an electronic add on unit but can't seem to find it. If not should I just swap and with what?


  2. wyldman

    wyldman Member
    Messages: 3,265

    You could go with a newer 5 speed,but it may take some work to get it in and working (clutch setup,crossmember,shifter,etc).

    Gear vendors and US Gear both makes add on OD units,so you keep your original trans and shift the OD unit separatly.Here are a few links to get some info.

    Gear Vendors website

    US Gear website