motor issue, please help.

[PIMPnifico]

hey all, I'm new here and I'm trying to get a problem with my xmod fixed. I recently bought the saleen Barricade, awd kit, and stage 2 upgrade. I installed the awd fine, but when I installed the motor kit, the car moved forward slowly and really slowly backwards, if at all. I tore the backend apart, trying to figure it out, but still no luck. So I took out the motor and installed the stock one back in....now this one is doing it!! Am I not matching the gears correctly, or what? I tried searching the forum, but I couldnt find anything that really resembled my problem. I dont think its a motor issue, since it is brand new. Thanks for the help