OK. The woman said she was going about 50mph and it just revved like the clutch was pushed in. It didn't pop out of gear. She said it makes a wierd noise. All the other gears are ok. It has @130k on it. Fluid has been changed regularly. Can I just buy the $50 rebuild kit at Parts America and do a rebuild, or does it seem like I'm going to have to find what part broke and replace that? Any idea what part controls the 5th gear?