How exactly do I make sure my 700R4 is locking up? Until today I could see the RPMs when shifting drop. It would shift 3-4 and the RPMs would drop initially to say 2100 then down again to 1900. I am assuming that the second drop is the lockup. Is that right? Today though I was monkeying with the TV cable and now I am not getting the second drop at all in ANY position of the cable. How do I check the lockup circuit and I have heard there is a lockup fuse. Where? The reason I am monkeying with the cable is I am getting jumps in my RPM in OD at cruise. Jumps back and forth when I am around 2000 RPM. I am pretty sure it is the TC locking and unlocking. So I was adjusting the cable to try and get rid of that. Now no lockup at all. What wiring in the 4 pin connector on the trans is involved in the lockup process if any? Where does it go? Thanks Harley p.s. my torque converter is supposed to be a low stall. 1400-1600 rpm or there abouts.