Never noticed traction difference until I tuned my GTO 5.7 today. Got her setup for 1st gear launch and hit 9.900 once but never again. Consistent times were 9.95X. Didn't see any tuning hints so I ended up with my final at 2.500 and 1st at 3.9XX. No wheelspin out the hole what so ever, shifting at 6.5k. Got to Indy and 1st gear launches just spun. Even a quick shift 1at to 2nd just spun. So... Why the huge difference in traction???