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Noise while moving in reverse manual trans

Discussion in '1994-2004 V6 Mustang Tech' started by Thestigmach1, Aug 26, 2017.

  1. Thestigmach1

    Thestigmach1 Thestigmach1

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    so I did a really big uh oh the other day. Driving home on a long trip, tired well beyond the point that I should be on the road. while down shifting from 5th to 4th I instead found reverse, hard and grinded it some. Finally coming out of autopilot I found 4th and went on about my way. thought everything was ok it seemed to shift fine. When I got home and reversed into the driveway I was greeted by a wonderful grinding noise while moving. It does it even with the clutch in but the noise stops if i take it out of reverse and keep rolling backwards. Still goes into reverse ok, all other gears seem fine. Is this the synchros or did I just ruin the reverse gear? how do you recommend diagnosing it? I really would like to avoid taking the tranny out or disassembling it if possible. Thanks in advance guys.
     
  2. douglass

    douglass Active Member

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    You might have broke or ground down the reverse rear, and possibly the gear cluster. I gernaded mine a couple years ago at low speeds. I was rolling forward slowly, and did a clutch drop in reverse, trying to prevent a semi trailer from turning into me. I blew the reverse gear, cluster, and flattened the teeth on one of the main shaft gears.
     
  3. Thestigmach1

    Thestigmach1 Thestigmach1

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    That's what I was thinking, any way to confirm that without taking it apart? Hoping one of the old tranny rebuilders know a trick to diagnose these kinda things. I'm going to start pricing out having it rebuilt, I would have the whole thing beefed up might as well while it's open. And compare that to getting a good used one.
     
  4. douglass

    douglass Active Member

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    I don't know of a way to check it with out taking it apart. I paid about 350-400 for a used one from a member on this site.
     
  5. oldfox

    oldfox Member

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    I would drain the trans look for parts. Then take it easy on reverse and try and make it last.
    just my 2 cents
     
  6. Thestigmach1

    Thestigmach1 Thestigmach1

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    I may have to do that to see how badly i screwed it up. Im on the search for a whole new used one that people dont want thousands for. Hopefully i find one for a decent price and its not messed up as well.