Any tune basics for the 65RFE ?
I have a 14 RAM 1500 crew cab on 35's with the factory 3.91's, corrected for the tires with HPT, but i'd like to dial a little bit of the part throttle downshifts as they're lazy, i see what i think are the tables i'll have to change.
I see tables for Drive and Overdrive, i opened the ones for Drive, but i don't think we're using those with this trucks.
So i guess i should be looking into the overdrive/Normal shifts
But then the stupid trans is a 5 speed instead of 6 speed, and it does some sort of tq coverter lookup for the 6th gear ? in any case
For shift, it uses output shaft rpm vs TP%, so to upshift the shaft speed has to be at or exceed the shaft RPM for the particualt TP% cell.
How about for downshifts? does it use the same logic, the output shaft has to exceed the rpm for the TP%? or be below that output shaft RPM for the TP% cel ?
Also there is a master 2-3 shift switch in the calibration that is disabled form factory. is this why the truck only seems to use 2-3 shift while shifting manually? 2nd and 3rd gear are super close in ratios, 1.66:1 vs 1.50:1, so in normal mode the trans goes 1-2 and then 2-4, but if i shift manually, i can feel the 1-2,2-3 then 3-4, would i screw something up if enable that 2-3 master switch ? sure i know i can try on my own, but i wanted to check before since i don't knoow anything about this trans, fact i haven't touched anything in the trans for that reason.
also is it possible to speed up the shifts a little ? this is prob the slower trans i've ever had :), i'm not racing the truck, just wondering if i can make the trans a little less lazy.
Thanks a lot.
1 Attachment(s)
Need a bit more help please
Quote:
Originally Posted by
Chad pope
ok so lets first start with the desired acceleration charts. Go to your shift general chart and look at your desired acceleration offset line. start with making all those in that line( 0 ) . that's really going to take the slush box feel out of that tranny. next go to your general line and click on throttle interpret. make all of those 100. that is the variable pressure control. it changes pressure as the throttle is pressed. next click on shift pressure, then click on upshift. this is the duty cycle that determines how much pressure is running at any given point from torque output. same concept as the throttle interpret. make all those 100 . next scroll over to general on the shift pressure. start with the max pressure lock. this will not let the line pressure build any higher than what you put here. I have mine set at 190. I wouldn't go any higher than 180-190 unless you have a upgraded separator plate in the valve body. to much pressure makes cross leaks. next click on the min line pressure and make it the same as the max neutral pressure (125). next click on max line pressure, this is were you can set the pressure to how you want it to shift. if you like it firm and snappy ,start with 170-180. most like 160-170. just remember what you put your max pressure lock at and don't go above that. next click on pressure fluid temp and set to 0. we want control of the pressure not to temp lol. next click on pressure gain/gear and max out those values. next go to torque converter and then click on general. scroll to the tcc shift slip and tcc shift slip thresh and set those to 0. that is just unwanted heat. next go to manual and click on skip shift enable ect and max that out so it wont skip shift. next you can play with torque management. I have disabled all mine and I have a heavy crew cab with no issues for over a year with a very firm trans shift. I really hope this helps someone. there wasn't any writeup when I was playing with the 545 and the 65rfe tuning. let me know if I can help
I did everything as outlined in Chad's guide. All I can say is WoW! What a difference. I did however also followed what someone was mentioning as far as a lower duty cycle to make it less harder shifting... All good but... got a MIL P0868 - Transmission Fluid Pressure Low (Pending, Current, Permanent). Can anyone help guide me how to fix this in my tune...
Attachment 94646
Appreciate any kind of help here.
Thanks,
Mouritz