Drivetrain SROD curiosity

Discussion in 'Fox 5.0 Mustang Tech' started by 7991LXnSHO, Jan 25, 2013.


  1. 7991LXnSHO

    7991LXnSHO Active Member

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    Thinking about my 1979 302 fox got me wondering about the tranny problems I had. When I got it, first gear would sometimes pop out, even pushing it in place. I eventually jammed out first gear and the shop had a horrible time getting it right. A T-5 swap would have been a better deal back then. It took a first gear, syncro, shift fork and I do not remember what all with the many trips into the shop. The shop ran a piece of hose with a breather from the vent to the front of the car to keep the gear oil (not auto tranny fluid like a new tranny) from running/foaming over. That looked like a red neck fix.

    So what fluid should they have put in???? What would have made the SROD pop out of first gear???
    #1
  2. jka

    jka Member

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    The SROD transmission uses 80w gear oil and the T5 uses Dexron/Mercon automatic trans fluid.
    #2
  3. 65ShelbyClone

    65ShelbyClone Founding Member

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    They should have filled with GL-4 gear oil, which it sounds like they did(at least the gear oil part).
    #3
  4. 7991LXnSHO

    7991LXnSHO Active Member

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    OK. So that still leaves the not holding first gear. I had the stock shifter, so it was not a shift stop bolt adjustment like you could do in a T5.
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  5. jka

    jka Member

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    Bad syncros or chipped/broken gear teeth will cause it to pop out of gear also a bad/bent shift fork will cause it too.
    #5
  6. 7991LXnSHO

    7991LXnSHO Active Member

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    It seems they replaced all those parts. But it was one part per "try it now"
    . And I think the shift fork was replaced twice, and the synco finally did it.
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  7. jka

    jka Member

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    Could be a worn gear. IT could be a worn shifter that's causing the problem too.
    #7

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