Yea 245 shouldn't require any kind of re-gearing to get above 80. Cat's (in my personal experience with bad ones) doesn't fit the bill. Not ruling it out but when I had bad cat's, the car (it was a Kia not a Jeep) literally suffocated itself and killed the motor. The fact your power issue is solely being stuck at 80 and not fluctuating makes me think it's not cat's. Definitely looks more like something with the trans/OD.

_________________
IT'S BUSINESS TIME!
..Chris.....
2004 KJ Sport 4wd Gasser
Front hooks, Rusty's Gas skid, CURT hitch with a Pirate Hook!
OME HD Springs, Koni shocks, Teraflex bumpstops, Sumitomo A/T's 245/70/16 on Moabs.
K&N "Cold" air intake.

It will get past 80 if I make it, it just always wants to be in overdrive, I hit the gas on the highway and it revs up to 3k toms and immediatly jumps down to 1.5-2k and wants to stay there

_________________
04 Rocky mountain KJ (SOLD)
OME Front Kit 790 springs on OME NS131s
skyjacker rear shocks and springs
ARB Deluxe bumper w/ Warn 9500i
Skid plates all under
ARB On-board Air w/ Front & Rear Air Lockers
JBA 4.5 UCA's
Lots O' Lights

"If it ain't broke...it might be after i try this!"

Random thought if I had my shift points reset, would I have to do them again if I disconnected my battery? I disconnected to do my head unit

_________________
04 Rocky mountain KJ (SOLD)
OME Front Kit 790 springs on OME NS131s
skyjacker rear shocks and springs
ARB Deluxe bumper w/ Warn 9500i
Skid plates all under
ARB On-board Air w/ Front & Rear Air Lockers
JBA 4.5 UCA's
Lots O' Lights

"If it ain't broke...it might be after i try this!"

I have always just tapped the body of the cat with a rubber mallet. If you hear anything rattling inside when you hit it, then they are bad.

_________________
2007 Light Khaki 4x2 Sport
- Debadged - LTT CAI with Amsoil Filter - JVC HD Radio - Infinity BassLink
- Iggee Seat Covers - Black Moabs - 265/75-16 Cooper Discoverer ATP - 4.10's
- DIY Franky sitting at 23.75" - Al's 4.5 UCAs - Trimmed F&R Bumpers
- Removed Rear Sway Bar - Removed Rear Vibration Damper
- 75k miles so far...

you need to take it in for an automated relearn, if it's shifting like that i doubt it has anything to do with a blockage, sounds like the transmission wasn't properly flashed/relearned when it was installed

_________________
03 Renegade (Black)
177k miles 3.7L gas - 45RFE
Command Trac / 4.10s
Lift: ft. 790+ rr. JBA4+
The last of the TrailReady Front&Rear Bumpers and TR Rock Rails
Jarhead Offroad light covers
31x10.5R15 RedLetter Grabbers on Blackrock Dunes
L.O.S.T #KD098632

I had it happen on a Suburban. Anything over about 2500 RPM, and it would just chike down. Below that, I tran fine. Without driving and hearing/feeling what is going on, I am just guessing...

_________________
2007 Light Khaki 4x2 Sport
- Debadged - LTT CAI with Amsoil Filter - JVC HD Radio - Infinity BassLink
- Iggee Seat Covers - Black Moabs - 265/75-16 Cooper Discoverer ATP - 4.10's
- DIY Franky sitting at 23.75" - Al's 4.5 UCAs - Trimmed F&R Bumpers
- Removed Rear Sway Bar - Removed Rear Vibration Damper
- 75k miles so far...