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Transmission issues...gear vendors overdrive

Discussion in 'Ford Trucks' started by beanz27, Dec 9, 2014.

  1. beanz27

    beanz27 Senior Member
    Messages: 984

    So I'm about to aquire a 1992 Ford F-Superduty, which as far as my research has told me, is basically a F-350 with a bit more suspension and lower gears. Anyways, it is a 7.3 IDI with a banks turbo, 5 speed transmission.

    What I'm told is that it will not go into reverse, and apparently they think it has something to do with an aftermarket "gear vendors" overdrive. :confused:

    That doesn't really make much sense to me....how could an aftermarket overdrive mess with reverse? Says it goes forward with no issues, just no reverse....anyone got any suggestions as to what to check on it?

    If it is a problem with the aftermarket OD, can you just pull out the aftermarket stuff and make the problem go away?

    Any insight here? I'm lost, not a tranny guy:confused::confused::(
     
  2. Sprag-O

    Sprag-O Senior Member
    Messages: 220

    Most GV's I've seen are divorced, can be replaced by lengthening the driveshaft, or finding one that works...

    Gear vendors have an clutch or band in them, and reverse commonly burns out. They are real sturdy for forward travel, but I wouldn't run one in a plow truck, reverse with load eats them up quick.
     
  3. beanz27

    beanz27 Senior Member
    Messages: 984

    So what your saying is it's probably an entirely different transmission from stock? I didn't understand how they could essentially add another gear to an existing tranny. Also, it's not doing much plowing. Might do some roads with it at some point, but no lots for this truck. I'm looking at it for either pulling a bobcat around with, or sanding with.

    Can I replace just the reverse side, or do I need to do a full rebuild?
     
  4. Sprag-O

    Sprag-O Senior Member
    Messages: 220

    A gear vendor is an auxiliary overdrive... They either bolt to the transmission/transfercase, or are divorced... The bolt-on style may reuse the yoke off the original transmission/transfer case. The divorced style just have small driveshaft between the transmission and the gear vendor.

    If you aren't looking to plow with it, I'd consider pulling the vendor and rebuilding it, they are pretty simple units.
     
  5. beanz27

    beanz27 Senior Member
    Messages: 984

    Interesting....I'll have to really research this. I definately don't want a 4 speed transmission, so if I can rebuild it, I'd like to do that. So how does the GV unit affect the reverse gear?
     
  6. Sprag-O

    Sprag-O Senior Member
    Messages: 220

  7. wahlturfcare

    wahlturfcare Senior Member
    Messages: 321

    I have I. On my 460 5speed plow truck and have never had a problem in 5 yes. I do know that the 5speed ford trannys do have a problem of loosing the reverse gear a lot though.
     
  8. Sprag-O

    Sprag-O Senior Member
    Messages: 220

    Which 5 speed?

    M5R2, ZF 542 or 547? Gear vendors have separate clutches etc for reverse... If Reverse in a manual went, you'd have to have some torn up teeth in there.