Originally Posted by ExRCRacer

Hi Guys -

I posted this up as part of another post in the EB48.4 thread, but figured I might want to post here as well given it's specific to the truggy....

*I have x2 of these... and both blew a diff* - One truck blew a rear diff, the other a front diff. At least... that's what I'm assuming it is right now. I haven't torn them apart, but one was RWD only, and the other FWD only. the center drive is spinning to both ends - but the outdrives aren't.

A lot of people were puzzled by this at the track as they haven't seen a Tekno do that before. I'm confused as to what I did wrong on these? When I got the kit I had to contact Tekno because the spider gears were not moving freely on the cross pins what-so-ever. At first, Tekno denied that could even happen, but after sending them a video they sent me replacement spider gears and cross pins for both trucks. I confirmed the replacements spun freely and installed them, but yet this? Did I shim incorrectly? Is there something else I'm doing wrong?

I plan to tear them apart tomorrow. I'll update what I find but sheesh... I've never had x2 blown diffs on x2 cars in the same day! I've been building these things since my first Futaba FX-10 - not to say I didn't do something wrong, but unlikely IMO. Any ideas?

PS - I'll check when I get home to see if a set screw may have backed out. I should have spun the tires on both of the vehicles to see if the diffs were good before I rushed to ordering parts. Oh well - I'll have extra's if it's not the diffs . Thank you in advance for your responses guys!