Make sure to adjust your brake controller properly. Slide the manual actuator on the controller all the way. Try to pull the trailer. Adjust the controller until the truck barely moves. This should give you the max trailer braking without locking the trailer wheels. Might have to back it off...
Check the backlash before removing the old diff.
Keep track of the location of the spacers.
Check the backlash after installing the locker.
If there is a difference and the backlash is no longer within the manufacturer's specs then you will need to re-shim.
If it is the same or different but...
Been driving it daily for over a year with no problems.
They asked me when I got the tune, how hard I normally drive. I told them that I don't drive very hard so they tweaked the trans tuning for me.
I have not upgraded my DashDaq because I would lose the KEM tuning.
Not as much power as the...