Stealth transmission slipping problem

[Gtstwincam]

I have an RC10 B3 with a stealth transmission. Installed a brushless system and the transmission slips bad. I tightened the slipper clutch all the way and it still slips.

With the slipper fully tightened and holding both wheels down, i can turn the spur gear, clutch assy in both directions. Not sure if something is wrong internally.

Anyone have any ideas?

[RC10th]

It could be one of two things, either the slipper clutch is slipping or the differential is slipping.

Can you determine which it is?

[Gtstwincam]

It was the differential slipping. I removed the rear right wheel, tightened it up a bit then backed off. Works! Now gotta work on the good pan