Quote Originally Posted by Ldub
Are you the first owner? If not, a previous owner may have installed a trans. interceptor. This would account for the more aggresive (read clunk+kick in the pants) shifts. If that's the case, it can probably be adjusted.

Ldub

Hey, I just posted a new thread about a similar "kick in the pants" shift. I thought it was from 1st gear into 2nd, but maybe it is 2nd to 3rd. It happens right around 20 mph. I am a brand new owner, I've had it for 3.5 days only, and I took a short drive (about 3 miles) where the trans was clunking like this. Then I stopped the truck, took a lunch break and drove back to work with no clunking. Hopefully this isnt a huge problem. Gaaaad I hope not!

Bart