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What overdrive is this?

Discussion in 'Early CJ5 and CJ6 Tech' started by CJ51962, Oct 30, 2013.

  1. Oct 30, 2013
    CJ51962

    CJ51962 Member

    Seattle
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    Jan 10, 2013
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    Last edited: Oct 30, 2013
  2. Oct 30, 2013
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    It looks like an early electric Borg-Warner overdrive that would bolt to the back of a T-89 or similar transmission.

    [​IMG]
    http://www.fordification.com/tech/overdrive.htm

    These were used in a lot of different cars, including Willys apparently. Interesting, but you don't want it.
     
  3. Oct 30, 2013
    duffer

    duffer Rodent Power 2019 Sponsor

    Bozeman, MT
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    My guess from the numbers on the case is that is a R7. Pretty early version of the Borg Warner OD. I believe the units Rancho adapted were R10 or R11's like the one in Tim's picture. It is highly unlikely you could adapt that to a D18, at least not without a lot of custom machine work. I believe Herm still has a few rebuilt Rancho type units available but those do not work in 4x4 like the Warn/Saturn OD's. That said, no reason you couldn't put both in if you have a big engine and room for a rear driveshaft.
     
  4. Oct 30, 2013
    CJ51962

    CJ51962 Member

    Seattle
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    Well, as always, thank you guys. Guess I won't be making the trip to Tacoma after all!
     
  5. Oct 30, 2013
    w3srl

    w3srl Semi-retired in Florida Staff Member

    Port Orange, FL
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    Medium-duty Saginaw 3-speed with OD, not worth crossing the street for in a Jeep application IMHO.


    Sent from my iPad using Tapatalk
     
  6. Oct 30, 2013
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    Picture is from the Fordification site - the OP is looking at a bare R7 overdrive. Just FYI.
     
  7. Oct 30, 2013
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Yeah, I don't see a Saginaw 3 speed?


    Sent from my iPhone
     
  8. Oct 30, 2013
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Nov 27, 2006
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    2,794
    was used in the station wagons and pickups in 2 wheel drive configuration only.
     
  9. Oct 30, 2013
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Was also used in VJ Jeepsters and in Studebakers.


    Sent from my iPhone
     
  10. Oct 31, 2013
    Corveeper

    Corveeper Member

    Chanute, Kansas
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    Jul 29, 2005
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    Right, actually looks a little shorter than the R-10 I used to have.
    Still not worth the effort, IMO.
     

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