[instantkevin]

there's really no telling with this situation. there are a lot of things the previous owner might have or might not have done when installing the shift kit. some shift kits require you to drill out certain holes in the shift plate before installation (this may not have been done, or done incorrectly). Solution: (unless you can determine the manufacturer of the installed shift kit), buy a new one and install it correctly.

another thing, off the top of my head, in the tailshaft of the trans there is a round cover (the one without a wire plug coming out of it). the govenor is in there. the previous owner may have removed the springs from it, or replaced with stiffer springs (the tranny might have shifted to early for him/her). this would increase the shift points. call the people at www.transmissionhead.com to get the right springs. this is a pretty easy job, and the springs are cheap.