you may have bought an improperly balanced driveshaft or the u-joints may be bad in it, i went to the finals on saturday, pretty damn awesome huh? did you get one of the driveshafts that they had just laying around in the swap meet? if so i bet that it is the cause, 99.9% of the time when you change or install something and something goes wrong, its because of what you changed, so try putting your old d/s back in and see if that fixes it, good luck
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88 Notch, B&M Ripper, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframes, 65mm TB, March ram air ,MSD coil, U/L control arms, 155lph f/p, Crane Adj.FPR, Nitto drag radials, best 1/4--> 13.76@101.4 on a 2.17 60ft
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