Sounds like it's the jump, if it's short and steep...it probably bucking the rearend up when it hits the ramp, might have to slowdown, how are other 4wd cars hitting it? Also, are you running a lot of drag brake?
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Losi XXX-cr / Losi XXX-Tcr / DEX410R (Tresrey car in the works!) / Losi 2.0E
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