I have a 1997 honda fourtrax 400, owned since new. Repaced rear differential 7 yrs ago. Thought it failed again. Replaced differential but rear wheels still do not pull. u joint and driveshaft are ok. Any suggestions? Only thing I noticed that was different was that the bolt going into the new differential was not tight. Snugged it up and installed. Maybe ring and pinion need adjustment. Anyone got any ideas? Sure could use some.