I just bought this 3Racing (#TT01-25/LB) Alum. Solid Axle (LB) For TT-01 from RcMart last week. It just great for my TT01-R type-E. I put this in rear gearbox in my car at first assembly, leave the stock differential shaft in the box. It works very well for drifting. All I have to do is move o-ring a bit, take the pin out and put th bearing in both side. That is it, so easy the assembly. It also fit perfectly in the rear gearbox. A must have for drifter.