As MACK suggests, the shimming may not have been correct when they did the brake job.
The
space between the Outer Brake Friction Surface & the Differential
Bearing Carrier is to be maintained at 2.034 - 2.044 (very narrow
window) See 2nd pic
If they did not inspect and verify that dimension, that's probably why it grabs.
To
check that, you'll need to remove the final drive, remove the brake
assembly from the splined shaft, re-install the final drive and verify
the dimension.
You can use a known thickness of some metal square or
rectangle like 2.000", then try adding in a feeler gauge to get the
dimension. (even a round will work)
And, again as MACK says, a broken retraction spring will cause the same thing.
Worn or stretched springs will not let the discs return correctly.
They should have installed new springs, regardless.
When assembling, there should be NO lubrication on the balls or ramps.
Edited by Gatz in NE - 12 Oct 2016 at 10:01pm
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