Well, your tire size shouldn't throw it off much.
The cracked filter mentioned in the TSB will cause engagement delays.
If it was causing a internal pressure the trans would slip.....you don't indicate anything like that.
The cost would be identicle to a normal trans service (not a flush....thats a no-no).
So, drop pan, replace filters, install pan, fill trans as needed, TSB now completed.
Now, the sluggishness thing.....Remove enouph of the intake tubing to let you see and touch the throttle bellcrank on the throttle body........Uh, this after you have verified the air filter and airbox inlet are not restricted.
Have someone hold the gas pedal to the floor.......at that time, see if you can open the throttle body further......if not, reinstall intake bits.
If you can open it further, most likely the gas pedal is bent, restricting movement.
About once every year or two I run into this.....the cause is always the same.....a mouse has died around the throttle body and become rock hard.
First time you floor it, the restricted gas pedal bends down and now you only have half to three quarter throttle.
Something to look at.
The other possibility is a restricted exaust system......a bent tailpipe with a kink, pipes mud packed, or lastly, one or both catalysts partially melted down.
None of these will set a code, not even the catalyst thing
A mechanic will have to operate the vehicle with a vacuum gauge taped to the windshield....this way he can see how the vacuum changes with throttle position.
Lazy gauge movements mean a restriction is somewhere.
If the gauge readings are poor, the next step is to operate the vehicle with the gauge still attached but the exaust aft of the cats, unbolted and supported.
If gauge movements are sharp and instant, there is a restriction somewhere in the system...most likely a baffle has broken inside the muffler and exaust pressure has jammed it into a internal inlet.
If the gauge still is lazy, remove both cats and road test....save this till afternoon, it really annoys the neighbors.
If the gauge readings don't change and power is still poor, you are now looking at a cam timing issue.......I doubt if it would get that far.
Last edited by robby; 08-04-2011 at 07:59 PM.