[vettetlb]

It was doing the same thing when i had the turbo 350 trans in it. I swapped out some time ago for a 700r4. This prolems has been around since i bought the truck several years ago. I always just attributed the problem to a tired cam. I finally decided to go ahead and change out the cam. And wouldn't ya know it...same f@#$in thing.
It was mentioned earlier about the timing. If that outer ring has moved, that would make sense. I set the base timing according to the timing mark on the balancer. I can see where if the timing was severely retarded, it would definitely cause a lack of power. As i haven't changed out the balancer, it could be the problem.
And yes the trans shifts through all 4 gears without any issues. I have the kit installed for the lock up converter and a toggle switch to kill power to the converter completely.