what trans is it?

Discussion in 'Transmissions' started by Zooomzoomguy, Jul 23, 2007.

  1. Zooomzoomguy

    Zooomzoomguy Member

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    here's the numbers of the trans tag as they sit on it, any idea what type of trans is it? its a some sort of top loading trans as the cover is on top

    RAD-3 5D21
    D-4ZR-AA 203503
     
    Zooomzoomguy, Jul 23, 2007
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  2. rayzorsharp

    rayzorsharp I "AM" a Maverick!

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    Don't have a clue...got any pics???
     
    rayzorsharp, Jul 23, 2007
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  3. Zooomzoomguy

    Zooomzoomguy Member

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    sorry no pics atm, its a some type of a toploader i found out, later model of it it seems
     
    Zooomzoomguy, Jul 23, 2007
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  4. PaulS

    PaulS Member extrordiare

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    It is not a Toploader four speed - The numbers don't match. It may be an over-drive tranny with 3rd gear at 1:1 and the 4th gear an over-drive. They look a lot like a toploader but they have a different shifter mounting pattern, a bulge in the side of the case for the O/D gear and the speedometer drive is on the wrong side for a Toploader. Some of these even had an RUG part number. The suffix was different than any of the Toploaders though. RAD was never used, to the best of my knowledge, for Toploaders.
     
    PaulS, Aug 23, 2007
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  5. baddad457

    baddad457 Member

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    Toploader speedo location depends on the model. Some were one side, some the other. His numbers don't point to a Toploader though, more likely a weaker Mustang II 4 speed. it's got a April 21, 1975 date code.
     
    baddad457, Aug 23, 2007
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  6. mav6977

    mav6977 Member

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    Yup

    Yup, it's the Borg Warner SR4 transmission that Ford used the RAD
    code for. Amazingly, you can get rebuild kits for them! It later metamorphed into the T4 then T5 trans.
     
    mav6977, Oct 23, 2007
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