M1028 Rear Axle Hop when Cold

[agouda]

When vehicle sits for a few hours the rear axle locks up and vehicle will not move until I punch it, then rear axle hops and moves. Another option is to put it in reverse and then forward. After the initial lock up it drives fine. Any thoughts on the problem?

 

[Cucvnut]

you have a rear locker in the axle and a posi up front.

 

[pigfoot63]

Have you checked the fluid in your rear axle. Did maybe someone put go-90 in it. I would drain it and put some new posi- track oil in it.

 

[Cucvnut]

you dont need posi oil in the rear axle just the front

 

[Sharecropper]

Sounds to me you have a brake issue. My M1028 did the same thing, when I pulled the rear drums I discovered a leaking seal.

 

[Westech]

you got fluid leaking I bet

 

[DokWatson]

Does it only happen at or below 32 degrees? When was the last time the gear lube was replaced? If you got water in the axles it might be freezing.

 

[agouda]

I am going to replace the rear fluid today. It is weird that if I backup and then forward it does not bind. Maybe it is a brake issue!

 

[KsM715]

Sounds like a brake issue.

 

[MWMULES]