The torque converter appears to be doing odd things! There are times the truck shutters and stumbles from a stop and shutters and stumbles, almost as if preparing to stall, coming to a stop. It can shutter like made at times when driving at any speed until it gets to highway speeds and is then somewhat OK. Then at other times you would never think anything is wrong with the truck! It almost always drops about 300 RPMs when in a coast at any speed. It sort of feels like you are dropping to a lower gear, but just barely touching the accelerator puts the RPMs back to normal and you feel it "free up."
Running through the GM Converter Lock-up problems diagnosis, there is NO light on my light tester on Terminal "A" of the top connector off the driver's side of the tranny near the linkage cable w/ the key on, engine off. (Harness is light gray with letters A through D on one side and E through G on the other.)
There is NO light on Terminal "D" of the connector when running in OD at 60 MPH. You hear it run through all gears on the way up.
Wanting to test the Quick method for test #1 to check for 12 V at terminal "A" of the ALDL then test by jumping "A" and "F" for TCC lockup while driving at 35 MPH, if test #1 passes. How do you tell what ports are what on the ALDL connector???
Thanks, Kevin