My turbo has been "barking" since I got the truck new, 72,000 miles ago. I have an auto and it does bark every time it goes into overdrive as well as when having to let off the throttle to avoid hitting the soccer mom changing lanes without notice... ..... The bark has definitely increased in frequency since the installation of the Dunrite TC and increased line pressure from the shift kit giving firmer shifts and the corresponding rapid drop in RPM's.
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1998 Driftwood Extended Cab,Short Box,12 Valve,4X4,Auto,Dunrite TC,3. 54,Banks Plate,AFC Spring Kit,Isspro EGT,Rickson 19. 5's,Abbott EPRA, Rancho Shocks,Heim Trackbar,Mag-Hytec transmission Pan & Pumpkin Cover,Amzoil Synthetic's,Ranchhand Bull Nose Front Bumper, Headache Rack,Tool Chest,Side Steps,Rear Bumper and 100% Stock Airconditioning.