After driving through 1-2 feet of slush/snow on top of ice today, I realized that I liked the handling of my Q better with the rear diff locked than with it open. Unfortunately, I have an '89 80q so the diff unlocks at 15 mph. Has ayone modifyed their car so that the rear diff stays locked? Any disadvantage to doing this? And the big question, how could this be done? TIA Mike Stump 80q