Rear disc brake setup.

[chrger1967]

When the prior owner pulled the axles to install the rear disc brakes, would all the axle fluid leak out? Its an 8 3/4 sure grip. When I'm moving the car back and forth in my driveway, I'm hearing all sorts of odd noises. Is there a plug on top I can check for axle lub? I wouldn't be surprised if when they did that upgrade, they never filled it up if they emptied it.

 

[j-c-c-62]

Are the SG thrust buttons still in place?

 

[chrger1967]

Are the SG thrust buttons still in place?

I have no idea. I would I check that?

 

[j-c-c-62]

They have been known to fall out of the SG when removing axles. If both axles are removed, and one can see daylight looking thru the axle, they are both missing and need to be located. I doubt this is the problem, but it could be. If one is in place, the other may fall out by itself, and that would seen with a flashlight, as they are two piece often shiny and reflective and approx 3/4" in diameter. This potential problem is a longshot and not the first one to be concerned with IMO but should still remain on the list.

 

[Don67Satellite]

Take out the fill plug and dip your finger in there and see if there's any fluid.

 

[493 Mike]

When the prior owner pulled the axles to install the rear disc brakes, would all the axle fluid leak out? Its an 8 3/4 sure grip. When I'm moving the car back and forth in my driveway, I'm hearing all sorts of odd noises. Is there a plug on top I can check for axle lub? I wouldn't be surprised if when they did that upgrade, they never filled it up if they emptied it.

No. None will if is sitting level.
Mike

 

[j-c-c-62]

I agree, unless its bone dry, it doesn't sound like a lube issue to me. Are we certain this is not an "Auburn" setup?

 

[chrger1967]

I agree, unless its bone dry, it doesn't sound like a lube issue to me. Are we certain this is not an "Auburn" setup?

What is an "Auburn" setup?

 

[j-c-c-62]

There are basically in a nutshell 4 8.75" differential options available, one is open, and 3 limited slip/traction controlled, one being locking style, which is HD but is a bit normally clunking and not OEM, one is a clutch type that wears over time but is repairable and the Auburn type, which uses friction cones that also wear but is not repairable. The last two are Mopar SureGrip offerings from different years and require in most cases a friction oil modifier be included in the rear end lubricant, to minimize wear and make for smooth operation.

 

[chrger1967]

There are basically in a nutshell 4 8.75" differential options available, one is open, and 3 limited slip/traction controlled, one being locking style, which is HD but is a bit normally clunking and not OEM, one is a clutch type that wears over time but is repairable and the Auburn type, which uses friction cones that also wear but is not repairable. The last two are Mopar SureGrip offerings from different years and require in most cases a friction oil modifier be included in the rear end lubricant, to minimize wear and make for smooth operation.

Too me it sounds like the driveshaft as it spins is rubbing on something. But I've checked a few times. I forgot to add, it only does it when the car is in motion, if I put the car on jack stands and put it into gear, it doesn't do it.