Join Date: Feb 2009
Location: Northeastern BC
Axle Shaft End-Play?
Yesterday, I had my truck up on axle stands to inspect the brakes, etc. I noticed that the rear wheel on the passenger side had some visible end-play.
Just to be clear, I'm not talking about run-out, but axle shaft end-play. That is, the axle and hub visibly move in/out toward the differential.
I checked the driver-side axle shaft, and it just barely moves in/out. The one on the passenger side definitely had more movement. I checked the service manual and it says the maximum end-play should be .030".
I don't have a dial indicator, so I used a set of calipers and measured it as best I could. The smallest reading I got was .057", which is almost double what the manual says.
It's a Ford 8.8 differential with a factory Torsen LSD. 31-spline, I think. The truck has about 50K on it. The tires are evenly worn, and there isn't any other sign that something is wrong. The diff makes the usual Torsen howl noise when accelerating from a standing start a bit when it's cold, but it's done that since new.
From doing a bit of internet searching, I found a few different opinions. On an F-150 forum it said that excessive axle shaft end-play can be caused by the clutches on an LSD wearing out. A Torsen LSD doesn't have clutches, so that's not the cause.
I also read that a lot of people say that's just how these Ford axles are, and not to worry about it -- they just have sloppy end-play.
Has anyone had some experience with this? Is it worth losing sleep over?
Thanks for any input.
If Princess Auto were a real girl, I'd ask her to marry me.