ZF6 - Low Reverse Problems - Ford Powerstroke Diesel Forum
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Old 12-03-2013, 06:41 PM
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ZF6 - Low Reverse Problems


Symptoms: Periodically i will be unable to shift into low or reverse however it seems if i cant shift into one i can shift into the other then shift into the one i originally wanted? Sometimes it wont go into either and i have to kind of rock the sifter back and forth a few times between low and reverse before it will finally go into one then the other. Shifter lever seems fairly tight not much play and i haven't had any problems with gears 1-5 other than the fact that my trucks syncros are shot. Then the other day i went to start the truck in neutral clutch fully depressed and the starter seemed to engage but couldn't turn over the motor. After trying a few times i put the transmission into 2nd gear depressed the clutch then the truck turned over just fine? All of the above symptoms happened when the truck was not moving, both warm and cold.

To be clear i have no idea if the starting problem is connected to the hard to get into low reverse problem. I'm just putting all the facts out there in the event they are connected.

I'm not all that familiar with transmissions, i'm hoping someone could give me some areas of where to look first or what the possible problem could be. preferably any ideas that do not involve removing and or tearing the transmission apart.


Last edited by Aaron9876; 12-03-2013 at 07:00 PM.
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Old 12-03-2013, 06:58 PM
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Sounds like you have an issue with your clutch... it's not disengaging all the way, or the fork is bent, both are resonably common but not super expensive to fix.

If you have a leak in the hydraulic system, it takes no more than 15 minutes and a flathead screw driver to replace the whole thing master to slave. for less than 200$

If the fork is bent you have to drop the tranny and while it's a big job, if your clutch is in good shape and you're just doing the fork and throwout, it would cost less than 200$ as well
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