Rear End Fluid

Mine is a sure-grip. The Mobil 1 bottle implys you do not need to add sure-grip additive but I put in 1/2 a bottle with the Mobil 1. I have no problems with shuddering.

You can mix all Mobil 1 synthetic products with conventional lubes, you just loose most of the advantages of having a syntetic lube. If you just want to top up for one more race I would just truck down to Wal-Mart and get what ever's on the shelf.

Please explain "The tubes are starting to twist". Are they slipping in the center section or actually twisting? I believe the tube itself is the same as the 8.75 rear end, they both are 3".