Here is a very informative video guide on how to shim the Diff in your HPI Savage Trucks.
One important reminder should be added to this video: When removing screws on the Diff Set, soldering iron or hot air gun should be used to soften the screw thread lock.
Below are some links to the parts mentioned in the video:
Differential Case Washer #86099
29T Hard Steel Bevel Gear #102692a
9T Differential Bevel Gear #102692b
WASHER 8x10x0.2mm #z877
WASHER 10x12x0.2mm #z892
Alloy Diff Case Set #86827
29T Differential Ring Gear Set
