Have an SM420...it pops out of 2nd gear at higher rpm's...could it be a worn shift fork? what could it be?

a couple of threads that might help....

http://www.pirate4x4.com/forum/showthread.php?threadid=25829&highlight=sm420+popping

http://www.pirate4x4.com/forum/showthread.php?threadid=25840&highlight=sm420+popping

thanks Bennett...could be my shifting fork...I'll check it out.