Not just a code reader, a full scan tool so you can monitor the o2 sensors

 

Get those codes first, cutting things apart to physically inspect could wind up making the situation a bigger repair.

 

again no codes

 

I looked into it i can either loosen the cats at the headers to create a gap or remove precat o2 sensors so exhaust can flow and if that works then the cats are bad

 

Stock 3.55 gears matched with 33" tires suck big time, it will be down on power, mpg's in other words a real dog. I know this from experience with the combo till I finally swapped to 4.56 gears.

 

Just disconnect the cat from the header, that'll be your best test

 

I know my daily had 35s and stock gears for a while then i regeared by ******* i mean goes maybe 5mph tops 10 it does not dog that much on stock gears

 

yeah once it stops raining i am gonna try that

 

Well the 2000 is a 3 cat system or 2 and something else i cut the cat off by the muffler runs fine but loud there are still two on a y pipe after the headers where 4 o2 sensors are so i guess the problem is solved

 

This makes absolutely no sense considering the symptoms in your OP.

 

Clogged cat apparently causes problems like that from what i found

 

Pick up a new cat from performance curve

 

Yup about like stock gears.