Rear Axle or Gear Confusion

[jonn6464]

Hey FABO, sorry this is not specifically for an A Body but it's MOPAR nonetheless.

1975 Trailduster, 3.55 suregrip, 2WD.

I had the rear end off the ground working on the brakes. When I put the wheels back on, I noticed that I can move (turn) the wheels about 1/4" before the driveshaft yoke starts spinning. I can hear and feel it when the yoke starts to turn, it has a little bump then it starts moving. I can see directly through the wheel well to the yoke, so I can see exactly when it starts to turn.

Is this a symptom of bad bearings or something in the ring gear, or something else all together? Or, is that normal?

Thanks for any replies.

 

[RAT ROD AL]

Called , wear , play , slop. Normal, I would say.

 

[Dana67Dart]

My 67 dart does the same thing but it has 321,000 miles on the rear.

 

[AJ/FormS]

1975 Trailduster, 3.55 suregrip, 2WD.

>If you're SureGrip is working, and it is a clutch-type, this may or may not NOT be normal.
> If your SureGrip is a Cone-Type, and working, this is probably normal.
> but if it is NOT a SureGrip, or it is a worn-out Cone-type, then;
What you are feeling is the pinion gears climbing up and down the cross-pin; and .25inch of wheel-travel is actually very good and nothing to worry about.

 

[jonn6464]

>If you're SureGrip is working, and it is a clutch-type, this may or may not NOT be normal.
> If your SureGrip is a Cone-Type, and working, this is probably normal.
> but if it is NOT a SureGrip, or it is a worn-out Cone-type, then;
What you are feeling is the pinion gears climbing up and down the cross-pin; and .25inch of wheel-travel is actually very good and nothing to worry about.

Ok great, thanks for the info.

 

[oldkimmer]

It’s probably a 9 1/4 rear. Dodge had a shim kit to put on the spiders that go on each end of the pin in an open diff. I can’t remember if u replaced them with thicker ones or they were missing and u had to add them. But like said it’s probably normal wear for the mikes it has. I have seen the axle splines worn. Kim