Scottishrule38

I've read the thread from grinding from the rear and it didn't help in my case. When my Jeep is warmed up and driven around town about 40 percent of the time I get a grinding from the rear from a complete stop. It goes away around 10-15 mph. Doesn't do it all the time and can't pin point it. This all started about a couple weeks ago. Now this is what I have done....I've changed the rear diff fluid and gears are all good. I checked both rear tires for any play and both are good. I changed my rear shoe pads thinking that might stop that sound since the old ones were all metal. I checked the drive shaft and it has no play. checked u joints and greased them. Both are good. Has new motor and tranny mounts. I think it's coming from the drums but can't duplicate it.Tried doing sharp turns to see if that makes it to grind and quiet as a mouse. No play from pinion gear nor any leaks. Any advice would greatly be appreciated. I'm running out of things to check.

boxburn

I'm not saying that it is your pinion but having no play doesn't mean it's good. I had a noise from standstill to about 20MPH then back down to 0. There was also a constant noise above 20. This was my large pinion bearing but no play could be felt.



When trying to pinpoint my noise I jacked my rear axle up, put it on heavy duty stands and chocked the front wheels then put it in drive. It certainly made sourcing the noise much easier as you can be there, next to the noise. I also found that with no play on one of my outer axle bearings, the half shaft had a pitted surface causing more noise. This was all on a Dana 35 axle.

Scottishrule38

Thank you for your reply and will check that.

boxburn

If by that you mean check the pinion bearings, you have to pull a lot to get at them and take pre-load measurements before dismantling and reset after. There is in the D35 2 oil ways for the pinion bearing, one is above and the other below. If your pinion bearings are failing I'd expect the lower oil way to have bits of metal all over it.

Scottishrule38

I know they can be a pain to get off and before I take all those gears out I will confirm what tools I need and any measurements so I don’t screw myself over. I will be doing this on a later date. So in the mean time I’m reading from service manuals and watching mechanics tear down Dana 35 axles. It’s going to be fun.

boxburn

All I can suggest is to check everything else before you jump into the deep end when you only needed to splash your toes.

Scottishrule38

Completely agree. Always start simple and work your way up to the headache.

boxburn