I recently put 3.73 gears inplace of my 2.73 gears and I changed the speedometer gears to 15/44 drive/driven respectively, and also replaced the sleeve (vss). The gears are giving the right speed, but the speedometer only worked for about maybe 25 or 30 minutes straight then it died, then at the track when going down it worked again, then it didn't.I need to know what is wrong i think maybe the sleeve (vss) is bad and i will need to get a replacement. Any help is appreciated.