545rfe ?s

Some where I read the 545rfe is nothing more than a 727 with overdrive, .

No, that's the A518/ 40x series RE/ RH. The 545 is nothing at all like the 727 in any way. Someone above posted, and I've read this before, that the only difference between a 545 "5 speed" and "6 speed" is the programming in the ECU. The 545 is ALL electronically shifted from an external controller