I am using 1up Racing gold grease inside front and rear gearboxes as shown on the picture.

I recommend the alloy diff case for center diff to keep the oil cooler and have more volume. Remember to use loctite when screwing down the diff. U9302.

I recommend using 1up blue oring grease for shock and diff orings.

I recommend using single thick shim on both sides of the diffs for them to run smoothly.

Michal Orlowski