1998 Ford 4X4 - 4.6L AT Lockup Conv Problem

[RANDY]

HELLO,
I HAVE A 1998 FORD 4X4 WITH STOCK ENGINE TRANS. IT HAS PROBLEM BEING SMOOTH AT 35-40 MPH. IT SEEMS TO BE KICKING IN AND OUT OF THE LOCK UP TORQUE CONVERTOR : . THE FIX WAS IN THE OLD DAYS A SWITH CONTROLLING THE LOCK UP TORQUE CONVERTOR ON GM CARS, IS THIS THE SAME PROBLEM?


4.6 ENGINE

[brianp87]

Have you watched the lock up on the scanner

[RANDY]

hi,
no but i will check

[protraxrptr17]

Chose custom data list on your scanner and only watch lock up and brake switch status. Had a bad brake switch cause this a few times. Watch tps too. IDK what kind of scan tool you have, but on my Snap-on if you chose only one or two items it displays faster.

[steven kiser]

does it do it if you drive it in 3rd not over drive?

[wbuxton]

This is typical of the speed the computer commands O/D. Watch for commanded gear and actual gear. If it is the trans the actual gear will be different from commanded (I doubt this as you should have a code). I think you have a engine related or controller problem.