Suddenly today the reverse ring won't allow me to go into reverse. I removed the boot from the shift lever and found that I can pick up a spring-loaded piece at the base of the shift lever, and it goes into reverse. I'm guessing the ring was in some way linked to the piece, and the linkage broke. It only lasted 326,000 miles! Can someone steer me to a digram of the lever, and instructions on what I need to do to R & R the broken part? Thanks! John