Just built this truck and have an issue.
When accelerating at about 20mph I get a horrid vibration/gear noise. It only last a fraction of second.
At first I didn't know if it was motor cogging or gear slip.
Having read the t3e thread today, I was starting to think that my shimming of the diffs may have not been tight enough.
But I just took the wheels off and gave it a couple of blips, and the vibration/gear noise seems to be the centre diff.
Basically it looks as if there is quite a lot of play between the diff and the holder making the vibration.
Should I shim the centre diff to try and sort this?
Or do you think it is more likely the rear diff under load, as I know that's a little loose, having read the t3e thread.