Ok so its really a electrical because the tranny shop drove it with a scan tool and said the voltage is jumping around from 14.8 to 11.1 at the apps sensor causing lock and unlock he said tranny is fine check the regulator so had a load test done every thing is good so how do you do a apps relearn another guy want to add a wire to fix it saying changing the apps wont fix it but it worked fine the last 12 years I don't want to do that thanks in advance

unhook batteries for a few, hook back up turn key on but do not start, slowly step pedal down to floor and slowly back up, done turn key off then drive it and see.

This is the one i had done to a pickup of mine for a while it helped alot. http://www.tstproducts.com/Torque%20Converter%20Lockup%20Switch.pdf Another option. http://www.atsdiesel.com/additionalinfo/3092218/4th%20Gear%20Hunt%20Fix%20(1998-2002)%20v1.0.pdf No idea if these will help your problem at all but with that auto tranny it will never hurt to know about these

  cumminsman said:

This is the one i had done to a pickup of mine for a while it helped alot. http://www.tstproducts.com/Torque%20Converter%20Lockup%20Switch.pdf

I did this too. It's pretty handy but there is one thing that I don't like. When I have it locked up it doesn't shift out of overdrive for some reason. Can anybody explain this?

Im not much of an auto man but i thought the locked up converter was overdrive. You can turn the ground switch off and push the od off button on your shifter and then flip the switch back on to lock it in third.

I feel stupid it was dirty battery cables cleaned them and never had anymore problems I also had a problem at this time when it was cold the transmission would act like it was going in to natural come to find out that with the synthetic transmission oil it expands when its hot and would read full but cold it was 1 1/2 quarts low added the oil and haven't had any more problems thanks to everyone that has helped me