[captain harlock]

T4s can easily make wheelies with even a brushed motor.

I have not tried it myself, but I believe it'll help reducing the trucks wheelying problems to some extent:

You can get yourself a set of ceramic ball diffs from Acerracing and put it in the T4's differential. This way you can add some more slip to the diff and adjust the spur's clutch further more.

Also, using the B4's tire would dicrease the truck's wheely