545RFE 5sp to 6sp conversion

[rodslinger]

I hate the ratios on the 545RFE in my Dakota and keep reading about enabling the true 6sp shift pattern. My ultimate goal is to swap in a 66RFE or see if s shop can put the 66RFE gearset in my existing case so I get a better 1st ratio for towing and a more normal upshift pattern for driveability.

I tried to follow some guides here to enable the 6sp upshift pattern and also used some of the stock parameters from a 66RFE file to try and get the shift patterns right. In the end it felt exactly like it did before I made any changes. Still skipped 2nd-prime on upshifts. I've attached my test file. Could anyone give me feedback on what I missed? I put in some crazy values for the 1-2prime shift cells hoping that would force the controller to go to 2nd before 2nd-prime but it didn't seem to change anything.

[VPP1776]

Your 1-2 and 2-2prime tables overlap up to 20% thottle. If you want, I can super impose the tables I have on my 65RFE if you want and attach the file here

[rodslinger]

I'd love to see it. Thank you.

[VPP1776]

I'd love to see it. Thank you.

give that a try, maybe make the 2-1 a little less sensitive, I have been meaning to play with that. It liked to get a little happy with the 30% ish throttle kickdown at 20-25mph. I would say split the difference between what I have and stock.

13 hemi stan trans rev 2 DFCO attempt.hpt

[rodslinger]

Thank you for that. I haven't even driven the truck in three months. I'll see if I can play with this next week.

[VPP1776]

Just so you know, we have successfully swapped a 66RFE in place of a 545 now. It works, just need to change the gear ratio parameters and it is happy.

[Kidracer]

Hey what about going the opposite way. I swapped a 6.4 into my 01 wj. Im using the factory ecu from the 17 2500 but I used the factory 545 transmission that was in the jeep. I need to change the gear ratios to what the 545 is but looking at the ratios in the 66rfe tables, they just dont make sense. For the 66 it shows rev 49.7, 1st 59.0 2nd 22.0. What scale are they using? Should i just enter the 545 ratios as they are and see or do i have to do some sort of conversion