My transmission has started shifting hard between 1st and 2nd gears but is smooth in all other shifts. Any thoughts on this? Am I looking at a transmission overhaul in the near future?

This is normal if you recently towed a heavy trailer - TCM can take several days to relearn no-load conditions - if not, try disconnecting the battery for ~30mins - then do some normal take-offs from dead stop, and continue normal driving - TCM should relearn normal stop'n'go driving technique within ~30mins

FYI: having a sig with your vehicle data and general location listed therein helps greatly in determining proper diagnosis and response - there are several notable differences in '05 and '06 KJ CRD models, even more in earlier Diesel models and export models

_________________
'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go

Thanks for the info. Also abut the sig info. I didn't know there was much difference between the 05 and 06 models.