Zip
New Member
Hello,
A few months back, I installed a brand new 8 3/4 diff with Eaton True Trac in my car. Everything fit and worked great, until last week.
I took my rear wheels off to do some brake work, when I noticed the end play in my axles was extremely large (probably like 3/8" or 10 mm). I did install fresh outer (wheel) bearings when I installed the new diff so a little play from their break-in period would be fine, but this seems excessive to me.
At first, I thought the bearings (and their collars) could have started to come loose. I took everything apart, but didn't see that happening. I even threw both shafts+bearings under the hydraulic press to double check. When I didn't see or feel any movement after applying 3 tons of force on them, I realised that wasn't my problem.
So, I thought maybe the end play adjustment was just wrong overall. I put everything back together and tried to adjust the shafts to the right end play. In the end, the adjuster was at the end of its range and I still had 0.030", which is like three times the recommended value.
At this point, I have no idea what the problem could be. The only thing that would make sense in my brain, is the little dowel/thrust pin in the center of the True Trac which "floats" between the axle shafts. Could that have been ground of with driving for some reason? It seems highly unlikely, given that it should be hardened steel and is fully covered in oil, but I just can't think of any other cause to my problem.
I am very curious to what you guys think of this and hopefully some genius out there points me in the right direction! I must have overlooked something.... right?!
Thanks in advance!!
Zip
A few months back, I installed a brand new 8 3/4 diff with Eaton True Trac in my car. Everything fit and worked great, until last week.
I took my rear wheels off to do some brake work, when I noticed the end play in my axles was extremely large (probably like 3/8" or 10 mm). I did install fresh outer (wheel) bearings when I installed the new diff so a little play from their break-in period would be fine, but this seems excessive to me.
At first, I thought the bearings (and their collars) could have started to come loose. I took everything apart, but didn't see that happening. I even threw both shafts+bearings under the hydraulic press to double check. When I didn't see or feel any movement after applying 3 tons of force on them, I realised that wasn't my problem.
So, I thought maybe the end play adjustment was just wrong overall. I put everything back together and tried to adjust the shafts to the right end play. In the end, the adjuster was at the end of its range and I still had 0.030", which is like three times the recommended value.
At this point, I have no idea what the problem could be. The only thing that would make sense in my brain, is the little dowel/thrust pin in the center of the True Trac which "floats" between the axle shafts. Could that have been ground of with driving for some reason? It seems highly unlikely, given that it should be hardened steel and is fully covered in oil, but I just can't think of any other cause to my problem.
I am very curious to what you guys think of this and hopefully some genius out there points me in the right direction! I must have overlooked something.... right?!
Thanks in advance!!
Zip
