Hello , there is a hole in the gearbox not deep enough .
This is the hole at the back of the "sllipper" shaft ;
Keep an eye on it but you can take of some material with a dremel so the bearing go deeper or change this bearing against a 10X5X3 ( original is 10X5X4)( losi22_4 front wheel are that particular size )
If you look inside without the modification , intermediate gear goes to bearing side and give a grinding effect noooooo good .
Threadlock also on the screw .
Forget to put a second gasket on the diff itself , on high grip Nico blew the gear in 2 minutes .
5000 x-ray gear oil do a great job
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