Okay from what I have been reading I need to lock the rear differential. I plan on just using playdoh and jamming it in there. But if I wanted to remove it in the future for unlocked how do I do it?

Also I have an alloy shaft and ball bearings on the way.

Do I need to have threaded shocks as well?Or are the friction dampers okay for now?

Thanks!

Pull the play dough back out, clean the gears and use a bit of Tamiya Ceramic Grease and re- assemble..

Well saw this forum on an easier and cleaner way to lock the rear.

http://www.msuk-forum.co.uk/index.php?showtopic=20043

One user is saying put one of the MA13s between the other two so when they move it will lock the rear differential. Seems to be a much more easier and cleaner way of doing this.

Any potential harm in the future?

Using the MA13 to lock the Diff is a great idea. I bought a TT01D kit a few weeks ago and picked up a Yeah Racing #TT-069BU Aluminum Solid Axle that replaces the internal gear set.  I would probably use three  MA13's to keep the Rotating Diff balanced. Could have saved $10.00 if I knew this info before.

Wow...I would imagine the TT-01D would have the rear diffs locked already.

What is the difference between the TT-01E and D besides a heat sink/sport tuned motor/drift tires?