If you got the bucks, go with a Suncoast TC, they are top notch in my opinion.
Got one in a tricked out Dodge Cummins pushing gobs of torque and it is the only one I found that would hold the torque. I understand they make one for our KJ's..
If I ever have any problems with the current TC in my KJ, it will get one....

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Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited 
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve