For some reason(changing the body to often)my j.l x traction and pullback bodies seem to lose their grip to chassis what can i do other than buy a new body?Or might it just be my gn and chevelle bodies.

Read here somewhere that the AFX/Magnatractions/XTractions handle better when the body is loose enough to "rattle". Tried it out with a AFX Datsun 510 on a Magnatraction, and it runs noticably better than it does with a "tight" 510 body on it. I had that poor body in a small clamp for months hoping to tighten it up too :)

If the rattle annoys you, a dab of Shoe Goo or the snot that LifeLike uses should quiet them down.

I put a twistie around the whole body, twist it tight so the sides of the bottom of the body starts to pull closer to each other, then I let it sit in REALLY hot water, or put in on top of the water heater for a few days... let cool, remove twistie and WHAMMO!... the body fits tighter

Thanks for the tips guy's!They(the bodie's) don't rattle yet-they just slightly twist.

I put a twistie around the whole body, twist it tight so the sides of the bottom of the body starts to pull closer to each other, then I let it sit in REALLY hot water, or put in on top of the water heater for a few days... let cool, remove twistie and WHAMMO!... the body fits tighterOh yeah it works!