Terz1 745 Posted June 11, 2019 Hi guys. I found this youtube of a simple fix for the orv diff. When I recently refurbished a mud blaster I put a shim in as they do in the video. I also put bearings throughout. A while later I bought a re-re monster beetle and this has plastic bushings throughout. I found that when rotating the back wheels the mud blaster I put the shim in had more resistance even though it had bearings than the shimless monster beetle with bushings. Has anyone done this and did they experience the same thing? It looks like the trade off making by the gearbox less prone to failing by fitting shims is more resistance and more strain on the motor? Share this post Link to post Share on other sites
speedy_w_beans 4272 Posted June 11, 2019 This seems like the ultimate solution: Oldfrogshot's Screw Mod 1 Share this post Link to post Share on other sites
ruebiracer 1046 Posted June 11, 2019 1 hour ago, speedy_w_beans said: This seems like the ultimate solution: Oldfrogshot's Screw Mod Totally agree. With the screw, you have less resistance as the diff can spin freely in the bearings. With shims, you preload the ball bearings and get more friction. With bushings it´s even worse. 1 Share this post Link to post Share on other sites
Jonathon Gillham 4607 Posted June 11, 2019 I shimmed the diff in a rere Monster Beetle and it lasted a while and then the problem returned. This was just running a silvercan and often with EPA turned down too. The MIP diff works a treat though 1 Share this post Link to post Share on other sites
Terz1 745 Posted June 11, 2019 Thanks for showing the screw mod . I think I will remove the shim and try the screw mod. Ideally I'd get the MIP diff but it's not cheap especially since I've got three of these, the Blackfoot, Mud blaster and the Monster beetle. I think in time I probably will do them all, but one at a time. Share this post Link to post Share on other sites
Otis311 196 Posted June 12, 2019 I like the screw mod. You must have to grease the head of the screw well so it can spin relatively freely when the diff works. 1 Share this post Link to post Share on other sites
ruebiracer 1046 Posted June 13, 2019 On 6/12/2019 at 2:06 PM, Otis311 said: I like the screw mod. You must have to grease the head of the screw well so it can spin relatively freely when the diff works. And use Loctite for the screw end. Otherwise it can unlock itself over time... Share this post Link to post Share on other sites