I know some of the diesel guys at our track run in 4wd so they don't spin the tires halfway down the track.
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Ya. The fast diesels make so much torque around the 60' mark it's amazing. I tried catching one in my little Sunbird once and all I saw was a cloud of black smoke before the truck disappeared. Absolutely amazing the amount of torque it takes to move a 6500# truck to a 12 second trap.
Looks like i broke either the transfer case or something in the front axle, maybe a CV joint. I took the front driveshaft out and the noise went away for about a week, now its back and getting worse. So i will be pulling the front axle out and looking for a 2wd 4l80 trans or maybe a th400/th350 to swap in. The suburban is coming along with its tune so i can start getting this thing running like it should.