Originally Posted by Hi-LowBlow
Yes we are able to put the spec-r gear diff on the TCX if you would like to.
These are what you will need,
1. Spec-R gear diff for Tamiya 416x
2. Tamiya 416x front drive pulley
3. HB Cyclone TC front and rear drive belts
4. Tamiya 416x rear drive shafts
*For the rear drive shafts, you can also use our HB universal drive shaft (44mm) with plastic blades w/some dremel work on the drive cups on the gear diff.
I would suggest to start with #1000 diff lube.
Please let me know if you have any questions.
I've read some people would like to install a Spec-R geardiff (for the 416), but aren't trying it because at the front a tamiya pulley needs to be used and is a bit of a hassle to make sure it's center.
There's an easier solution;
I used a ball diff pulley instead of the one-way/spool pulley of the 416, used a reamer to make the center hole bigger (ream it from both sides) so that it fits snug over the HB spool. One screw hole will line up so the other 3 can be marked rather easily.