Ok, what happens is when i am cruising along goin about 60-65 @ about 2400-2600 RPM's and when I push the gas pedal a little more and wait for it to drop down a gear.....so it does but it all of a sudden climbs to nearly 5000 RPM's and sits and revs for about a quarter a second, and then i am guessing catch's the gear then drops down to about 4000 RPM's and i then start gaining speed like a *****! It has been happening alot lately when i am passing vehicles. This only happens when I am traveling at a constant speed then give it more gas. It never happens when i am like at a stand still at a light and i floor it and i just go through all my gears normally.

Let's hear some ideas guys...

 

did you ever get your speedo reprogramed after the new tires

 

no i didnt, well atleast not that i know of. I bought the truck used last year with the tires and the lift allready on it

 

iam not totally sure but that might be the problem. I would let a few more guys chime in first.