M1031 Rear Differential Play

[markinnh]

Hello,

I parked and got out of my M1031 (supposedly very low miles) and a friend standing by said "whoa its rolling". I grabbed the brush guard and can roll back and forth the whole truck 5 inches. Thats weird enough, but the drive shaft does not move until just the end of the 5 inches and then you can hear the tranny park pin. Does this seem like too much? It sure has got me worried.

 

[dstang97]

Its normal. I though the same thing. Its because of the locker

 

[MARCO1031]

Related to the locker. Has anyone ever heard a fairly loud pop from the diff while making a slow turn? Every now and then mine will do this and I am thinking it is something in the locker that is binding up.

 

[lavarok]

Related to the locker. Has anyone ever heard a fairly loud pop from the diff while making a slow turn? Every now and then mine will do this and I am thinking it is something in the locker that is binding up.

Low air pressure in one tire may make a similar noise during turns. Might be worth checking to rule out an easy fix. I had a bad rim on my '08 and it was leaking air real slow. When under pressure by 10lbs it would skip during turns which sounded like a pop.

 

[dependable]

I have an 1008 that I converted to a dually dump truck 11 years ago. The rear end locker still makes a loud clank when I turn with load and one wheel is on pavement and one is on dirt, or similar work conditions.

 

[cjtroutt]

It is the Detroit Locker It does it in my 1986 M1028A2 & my 1991 V3500 Chevy.
Also have other spair axle's & they do it to. Normal.

 

[transman]

I'ts just the nature of the beast. Also don't be surprised if sometime you're rolling to a slow stop on a slippery surface it feels like you got rearended. It's the locker doing its job. If you want smooth (less capable) go civy!!

 

[MARCO1031]

Hey thanks for the great replies. Glad to know this is a normal thing for these to do. I was hoping I wouldn't have to tear into the diff.