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Yep....a stock 3.9 with plate K&N and Flowmaster 40's will tear up a stock Trac Loc diff.....but then again I left over a pound of rubber on the street Just located a Torsen to replace it......

HL as in High Low, I know our cars are progammed for 2nd (Hi) gear starts from a roll and then shift to Low (1st) if 60% throttle treshold has been crossed. Is there a way to reprogram the trans computer to give Low gear starts.

Been trying to locate information on dimensions on the 3.9 Gen 1 Crank, I have a Jag AJ8 4.2 Crank and rods and was thinking of buying another 3.9 off of flea bay to use as a test mule. The 4.2 XK/XKR motor had the same bore to the Gen 1 at 86 mm but the stroke was inceased to 90.3 mm over...