Originally Posted by BIGTACO
If I fill the inside of my one way bearing / shaft with JB weld and insert the outdrives will that be enough to lock the front making a spool or will it slip?
I highly doubt it would work and besides, it's not necessary. If you want to make a spool for an MTX-4, there is a small plastic piece that comes with the kit to turn a front diff into a spool properly. You'll have to buy a few parts not included. Let's see, I think you get the diff housings, pulley gear, the spool piece (looks like a plus sign), and that's it. What you need to pick up are:
(2) Front diff outdrive cups
(2) 2mm diff pins
(4) 2x6mm FH screws
(4) 2.6mm FH screws
(2) .1mm shims
(2) 5mm o-rings
Mugen, if you are reading this, step up to the plate and start making diff/spool kits. Piecing all of this stuff together is a total pain. I have played this game with the MTX-2, MTX-3, and MTX-4 and it's not fun. If there isn't going to be diffs in the kit, make all of the parts accessible. Currently, getting the diff screws is a total nightmare for many annd I have had to make my own
EDIT CLARIFICATION: I built an "extra" set of diffs for my MTX-2. It came with 2 from the factory. Another mark for my case. It is really nice to have multiple diffs for quick changes at the track.