Setup: 10 Bolt, Detroit TrueTrac, Moser Axles, TA Girdle, Motive 4.10 gears, solid pinion spacer.

I'm getting some pretty bad drivetrain slop (Video below). With the tires on the ground, I can rotate the driveshaft a good 40 degrees before it engages. I checked my backlash and everything seems good (0.008"). However, with the diff cover off, and rotating the pinion gear, the differential itself moves a good amount before it starts moving the axles. So it appears that the slop is coming from either the differential itself or slop from the splines between the axles & differential.

Anyone experience a similar problem? A few guys told me that the TrueTracs have a good amount of slop new, but that's hard for me to believe. Maybe the splines from the Moser axles are already wearing out?

 

In my experience I've found True Trac differentials to be a little sloppy even when new.

 

correct, Truetrac units do have a lot of slop compared to a traditional open or LSD. You have to take up all the slack between all the gears before it will move the wheels. They need the slop so gear oil can get between the gears to lubricate them. Some vehicles are more noticeable than others. When doing GM Suv diff I always warn them of the clunk they may hear. They seem to be one of the worse, that and the GTO 04-06.

Miles