i have a nitro mt and i recently took off the engine mount bolts to clean around the engine, and i put them back where they went, but now when i push the car forward, the crankshaft(i think thats wat it is) turns as well? The car doesnt roll smoothly. Is this normal or did i mess up the engine mounting?

your gear mesh is prob too tight the gers on the engine and tranny need to have a bit of space to turn right. stick a piece of paper between them and tighten the engine up to that.

Is it RTR or the SS kit and is it stock? The RTR has a fixed setting and you cannot do much adjusting if any.

its the kit version

Then I have to agree with Vigilante212 and you do not have your mesh set properly and this is very important as if it is not correct you will eat up spur gears FAST. Good thing is they are cheap.
Good Luck.

Sweet im right for a change I took a guess since im not familiar with his truck, but it seems pretty obvious