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Truck Reving up in Drive and Reverse

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Sitting at the stop light today, foot on the brake, I let off the brake (had the radio going), and the truck jumped like I had mashed the gas pedal. Got home, and put the truck into park, and back into drive, and reved up to about 1000 rpm. Same in reverse. When in park or neutral had a rough lopey idle at about 500 rpm.

Anyone ever heard of this???
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Discussion Starter · #2 ·
Actually, just went out and check the truck. The truck is idling up to 1500 rpm in neutral and park, and then coming right down to normal. It rough and low idles in reverse and drive, you can hear the turbo spooling. It's never done this before.
 

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The sprag clutch on the stator in the TC has locked. You essentially have a no stall converter that is loading the engine. Easy fix is replace the TC, SOON before it sheds any FOD into the cooler and trans.
 
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