have you cleaned the throttle body too? thats usually part of my tune ups. but like said our rigs are heavy... almost 5000 pounds if i remember correctly. our rigs have a frame. if im not mistaken your jeep will have a unibody making it lighter than a durango. tire size will also play a part in this as well.

 

I know mine weighs more than 5000, its closer to 5500. According to the scale at the local landfill that is.

 

On the title of for mine it says the scale weight is just over 4100lbs...But this must have been before fluids mabey...

 

i believe the DRY curb weight is around 4800lbs for a 4x4

 

Yeah, I read somewhere 4060 pounds, also. My 'burban is 4600 and has 110 less horsepower.

 

Replace the transmission filter, adjust the bands, and fill with ATF+4 fluid only. Do not power flush it!!!!!

 

Check the cat.
Check for the deathflash too.

 

Thanks everybody for the help. Cleaning TB and trans service are at top of list.
Recommendations for a HD tourq converter? What is a "deathflash" and how does one find it?

 

The "deathflash" is a update from the dealer that they flash into the PCM to offset a plenum gasket leak failure. It was a cheap fix to a bad design. This will only affect the 5.9L and 5.2L engine. If you have this flash a update sticker will be placed on the PCM or under the hood on the front clip.

Hughes makes a good convertor.