Hello to all, im new here and have a question... I just bought this 96 3500 to pull my camper with.. i have noticed it shifts funny.. 1st to 2nd shifts great.. then sometimes it shifts from 2nd to 4th... i think... Also at WOT it wont shift out of overdrive into passing gear.. any help would be thankfull!!

 

Have you noticed the truck being able to down shift when accelerating in lower gears?

This could be a lose throttle cable, as the original throttle cables had a service life of 30,000 miles, or it could also be that your tv cable needs to be adjusted or replaced.

My father has a 97 that had the same issues and we replaced his throttle cable, and it fixed his problem.

 

Ok thanks i will try that! Yes it downshifts in lower gears.

 

Its an easy way to test if you have a bad cable. One person goes in the cab and goes WOT on the pedal and then someone else goes onto the injection pump and sees if the throttle will open further by hand, again this is how we had fixed my dad's 12 valve, if not it could be your tv cable a little searching on the web can help you find you answers about the tv cables adjustment.

Also since you just bought the truck has the KDP been tabbed?

https://www.dieselbombers.com/94-98-...l-pin-fix.html

here is the link to what a KDP will do if unaltered

 

O/D and lock up are controlled by the TPS .. if its going bad you will also have that same issue .. Mine wouldn't lock up for a bit .. replaced my TPS sensor and its been fine since..

 

Yeah i have to manualy push the overdrive button to get it to drop a gear..

 

TOS is bad...