I have recently purchased a 1997 F150 (2 wks) ...I know it is no Explorer but Glacier Brooken Bay and some others have been way beyond helpful in my issues with my other car...a 2000 Explorer. Anyhow it is 4x4 ext cab w/ 120k. It has the 4.6 and the 4R70w tranny and last weekend I degreased the motor and got the plug/wires wet and it ran like crap until I put new wires /plugs in it. Runs good again but tranny shifts really hard from 1-2 and 2-3 and shutters really bad and nearly stalls when you come to a stop , like the TC is not releasing. The truck always shifted a little hard from 1 to 2 but the person I bought it from said he had a performance tranny shop put a reman tranny in 6 months ago and thought maybe they put a shift kit in it. I took it too a local tranny shop to pull the codes (although the OD light was not flashing). They put a Snap-On scanner on it and no codes. The guy drove it and said the TC is locking up WAY too early and not releasing..that is causing the shudder when truck rolls to a stop, shifts points are fine. I think his scan tool showed if TC was locked/unlocked. He also said the brake should unlock the TC automatically and it had no effect. I noticed if I manually downshift it into 1st as the truck gets to about 10 MPH no shudder as truck stops...might mean nothing..someone said that means the mechanical part of the TC lockup is working....might be a clue to those who know more than me. He recommended pulling pan and draining TC..which he did. Oil and pan looked totally clean..like operation table clean....almost too clean like someone just was just in there. (recall I just bought truck a little over a week ago) . Of course he said for a cool $1600 he will rebuild tranny and new (reman?) TC. I am hesitant because other than a slightly firm 1-2 shift I had no issues prior to this(although it was only a week of driving) I am now scared to drive it....if the TC is coming apart it will get ugly fast. I am out of town for work until the weekend and plan on messing with it over the weekend.....can I test the TC lockup solenoid externally with basic tools (ohm meter)?