Has anybody ran into this problem? Trans howls when in gear, under accel and worst at coast. It's been doing it for about a year then last night it took a turn for the worst. The howl is 20 times louder and now it shudders under load. Checked fluids...ok, just changed filter and band adjust 4000 miles ago. Only 85k on the truck. I looked @ the mega viper, pretty cool, but if it's just a TC or something simple a trans shop can do for under 1000$, then i'll save about 1500$. Any advise is greatly welcomed