Hi, i have a nitro truggy, 21 engine, and i just noticed that when i pull the pull-start the tiniest bit, all 4 wheels (4 wheel drive) move. this has never happened before, this seems like a problem.

any help is greatlyappreciated.
Leonator134<br type="_moz" />

UPDATE! Now, the car won't roll forward with out making a popping sound which is the engine turning over. it is VERY difficult to roll it forward.  Do i need to take off the engine and shoot some wd40 in there?

Sounds like a clutch problem. CHeck this forum out and see if one of the guys there can help.

http://www.rcdiscuss.com/index.php/topic,18420.0.html

That is where most exceed questions get answered. They dont get on here very much anymore and i just dont know much about nitro.

Thanks!  the wheel problem stopped, so i started it in the garage, and it started fine. idled  excellently. after a few minutes to warm up, i gave it some gas, and it drove great for 15+ minutes. what ever the problem was, it seems to have resolved its self. it hadnt been driving for about 7 months.