My cat is shot, its been shot since i bought it, it makes a loud clanking noise, the heat shield is almost completly gone, i wonder if maybe the packing inside is broken and clogging it it up, i also have strong smells of gas while vehicle is running and a little while after i turn it off. I will check that hopefully today. If this is the case would the check engine always be on because i have no check engine light on, just a couple times before when i was doing highway driving

Where would the o2 sensor be? Am i looking under the hood or under the vehicle?

Also ever since ive had it when i put it into gear it clunks and jerks the vehicle a little bit, almost like vehicles do when parked on a hill

Mine had the same problem and was the tps. Try unplugging the trans control fuse under the hood and manually shifting and if it shifts fine its electrical and not mechanical problem.

Sat in park and revved the engine and i get to about 3100-3200rpm and it starts to drop a little while keeping same pressure on gas and it almost sounds like its having trouble breathing

You get at the O2 sensor from underneath. It's about the size of a sparkplug (maybe a little bigger), screwed into the exhaust pipe just where the pipe comes down from the exhaust manifold.

Ok, i didnt unscrew it yet but i realized my down pipe also has a good size dent in it which prolly isnt helping any..

That dent is there from the factory; not to worry.

O ok, thats kind of odd

I just fixed my tranny issue with a new TPS.

bad u joint in the driveshaft.

It turned out to be a clogged cat and in need of a tune up, thanks for everyones help

I had the same symptoms (power loss / not shifting). Turned out to be a clogged cat and a faulty neutral safety switch.

But is it not shifting into drive or wen driving

Mine didn't want to shift either. If you mashed the gas pedal while going down the road, it would bog instead of downshifting. It also sometimes wouldn't upshift into 3rd or overdrive.