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Yes - still have the MAR07 F37 oem 545 t\c from the Suncoast upgrade - the KJ t\c is 11" which completely fills the V8-pattern bellhousing size - the 68RFE has a huge bellhousing for the 13" Cummins t\c - there is absolutely no room in the KJ floorpan for anything that huge, as simply misaligning the transmission wiring harness and the dipstick tube results in crushed harness against the KJ floorpan.
The 545 is already mechanically over-sized for the 2.8, but software limited - it's the sloppy t\c and EMCC and further TCM programming that reduces the thru-put capability - as with the dual-output pump, it's all for efficiency and fuel economy - just needs the Suncoast\equiv t\c and some TCU reprogramming to increase pressures and apply-timing, like when KJ has been towing, firm shifting occurs for some time after removing the trailer till TCU learns to lighten-up - also, in the big 68 TCU, Tow Mode alters the t\c lockup mode for shifting and braking, incl the exhaust brake - get that stuff programmed into the KJ TCU, and you would think you had a totally 'nuther transmission - the Hemi trucks and cars are running 500hp on the KJ 545 with a\m replacement t\c's.
Problem we have is the Bosch CRD ECM, like Dodge\Cummins - DCJ gasser (patooie!) ECM\PCM has been Mitsubishi-based since the late '80's - they use all the sensors and modules and EFI schemes and transmission control schemes derived from the association with Mitsu - the single-board PCM for the Hemi trucks uses the same transmission routines as the separate TCU in the KJ and Cummins - it's the Bosch interface on the CAN buss that hasn't been cracked - I s'pect the '06 KJ's are even worse with that EVS traction control system, with ECM, TCU, and ABS all fighting for control, resulting in a driving experience like that of an old granny.
Yeah, I've been pondering a lot of things, but without constant access to the KJ, I'm not progressing much - and I'm still looking for the DCJ TCU rosetta stone on the 'net.
For the stout of mind and brave of heart, PCS.com offers a totally user-programmable stand-alone TCU, with 545 wiring harness - that would be very handy with the Euro ECM for the manual trans version, so there would be no missing-transmission arguments on the CAN buss, and resulting limp-mode engendering DTC's.
Also pondering the mechanical aspects and comparing part numbers - f'rinstance, pull everything outta the 68, from input shaft and pump to the output shaft and housing, stuff it into the 545 case - replace the KJ mini NV241 with the NV241HD from the '94-'04 Dodge trucks, rework the KJ driveshafts for the larger yokes, have Suncoast build a 11" t\c with the 68\equiv internals for a trans nobody could break.
_________________ '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
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