Hey guys, I was unsure where to put this but I recently bought a 2003 BA xr6 turbo with 357rwhp, I have owned it for about 2 days, My gear box blew last night for some stupid reason? at least I think its my gear box, when I put it in drive it doesnt move anywhere but when in park I cant push it, also if I keep my foot on the revs ther idle will go up then go down again even though my foot hasnt moved?. I read some stuff about anything over 300hp in stock gear box is not good but I wasnt sure? what shall I do? what is a common error or just someone elses opinion would be good