I understand what your saying, and it could be that or a bunch of other things. I just like leaving all the if's, the maybe's, the might be's out of it and begin with a logical series of tests to see what is actually going on. Testing and troubleshooting have always served me well.

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)