8ight T Front CV slipping

I just got done setting up a new 8ight T roller 1.0. I got it off ebay. I'm having trouble with the Front CV slipping at the drive cup under power. Under power it pops out slips and then goes back into place. Everything looks right from the drive cup out to the wheel. It is almost like the front driveshafts should be about 1-1.5mm longer. Not sure what to make of this, anybody have any ideas? Never had this problem with any of my other 1/8 scales.