What differential fluid?
Thread Starter
Racer
Joined: Oct 2018
Posts: 333
Likes: 86
From: Hope Mills, NC
What differential fluid?
Hey gang, so I changed my differential fluid. Now before I did this everything was fine however, I replaced the differential fluid with mobile one. Now that I have done that when I put the car in Drive or reverse it's slowly start to take off I get what is like a binding sound or clicking sound coming from the rear end almost as if something is catching. I do not have this car on the road yet so this is just going in and out of my garage. I have replaced almost everything on the back end from the bushings to the U-joints to the wheel bearings Etc. Some have said that in the differential you can only use the approved GM fluid with a limited-slip additive, is this true? Could this be why I'm now getting the binding and clicking sound from the back end? What are your thoughts and have any of you used any other fluid in your differential other than the GM and had no issues? Like I said everything else that I changed it was fine, it wasn't until I changed the rear differential fluid that I had this issue. I am not sure why it's simple fluid change would all of the sudden give me this problem but then again I am not a Master Mechanic. Let me know your experience and if I do need to use GM fluid, what do I get. Thanks
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Hey gang, so I changed my differential fluid. Now before I did this everything was fine however, I replaced the differential fluid with mobile one. Now that I have done that when I put the car in Drive or reverse it's slowly start to take off I get what is like a binding sound or clicking sound coming from the rear end almost as if something is catching. I do not have this car on the road yet so this is just going in and out of my garage. I have replaced almost everything on the back end from the bushings to the U-joints to the wheel bearings Etc. Some have said that in the differential you can only use the approved GM fluid with a limited-slip additive, is this true? Could this be why I'm now getting the binding and clicking sound from the back end? What are your thoughts and have any of you used any other fluid in your differential other than the GM and had no issues? Like I said everything else that I changed it was fine, it wasn't until I changed the rear differential fluid that I had this issue. I am not sure why it's simple fluid change would all of the sudden give me this problem but then again I am not a Master Mechanic. Let me know your experience and if I do need to use GM fluid, what do I get. Thanks
I have no personal experience of what happens if it is not used. Maybe this is what happens.
Drifting
Joined: Jul 2004
Posts: 1,356
Likes: 291
From: MA
Same thing happened to me when I replaced the fluid. I used Mobil one in the diff. and one bottle of the GM additive. I got noise when cornering.
I ended up using Amsoil diff fluid and the thicker 75-110 severe service with two bottles of GM additive.
No more noise after that.
I ended up using Amsoil diff fluid and the thicker 75-110 severe service with two bottles of GM additive.
No more noise after that.
Le Mans Master
Joined: Sep 2004
Posts: 6,019
Likes: 568
From: Conroe Texas
i have been using amsoil for quite a few years for all my oil/grease applications after a friend of mine 'gave' me all the fluids to service my car. i noticed the difference at the first oil change.
Melting Slicks
Joined: May 2013
Posts: 2,692
Likes: 349
From: Sacramento California
I'm not sure if Mobil 1 differential oil is available without the LS additive, just be sure that the bottle says LS. If it does not, you need to use the additive. Even if it does say LS, you might need to put in some more additive. This is a common issue. Not all LS differential clutches are built the same, the friction discs have different materials and different diameters, and the springs have different pressures too.
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