Change Rear End fluid

[MA Trailblazer]

I have a 2002 t.b. with 3.73 posi gears. It has 1200 miles on it now, and I notice the rear end will chatter a small amount when I turn a corner after driving on the highway. I had a similar problem with my old 2000 blazer, and I had to change the rear end fluid.

 

I cannot find anything in the manual about changing the fluid in a posi, but my old 2000 blazer said to change the posi fluid at the first oil change.

 

Has anyone with a posi had the same problem with the 2002 t.b.?

 

John

[deruch]

I also have a 2002 Trailblazer with the posi rearend and according to mygmlink.com you just need to inspect the fuild level every 7500 miles and add if needed, nothing about changing it.  

 

My dealership is pretty good about telling me what is scheduled when I  bring it in for oil changes, they want all the non warranty work they can get    

 

Don