2008 dodge ram 1500 4.7L Trans check

I've got a 2008 ram I've played around with engine wise and some trans wise

someone was super nice to look at it and make some changes to the transmission.
i changed some things myself due to fear of hurting something in the trans.
cant get in contact with that person to ask some questions.

if somone who is way more experienced then me could look at my tune and see what they think.
if i am being to conservative or am possibly making a mistake

Attachment 157099

this thread is worthless without pictures

(no log or oem read to compare this file to)

Quote:

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Originally Posted by LilSick

this thread is worthless without pictures

(no log or oem read to compare this file to)

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Attachment 157103Attachment 157104

I saw in another post that you aren’t familiar with 545rfe trans.
That’s what I have.
Appreciate you trying

i am not experienced with THAT fully electronic TRANS

not like i am with the fully electronic zf8's

i understand those very well

prolly better than i understand the ole 727 and its lil brother the 904

i have some experience tuning 46re and 48re but am not pro

here is what i know:

The only logic in the JTEC+ for the RE transmissions is governor pressure = 1 PSI per MPH. When in 4x4 low they limit pressure to 15psi to keep the trans from shifting to anything higher than 2nd gear. Shift timing = line pressure+shift spring vs governor pressure. Line pressure = spring pressure + throttle valve (which adds additional spring pressure) to raise line pressure (based on throttle). You can buy spring kits (shift kits) to adjust shift timing to any RPM you'd like with a RE trans. The 904/727 from the early 60s to the end of the RE trans in the early 2000s all use the same springs, majority of parts can be swapped throughout those years.

Transmissions such as the 45RFE, 545RFE, and 68RFE, are fully electronic so they must be tuned in the PCM OR TCM. They use no springs for control. Instead they use multiple electric solenoids to control shift timing and firmness. Those tables were not added to JTEC until 99 starting with Jeeps, when the 3.7/4.7 engines and the 45RFE trans came out.

HP tuners could not add options to tune the governor pressure vs speed value or torque converter lockup vs vehicle speed vs throttle position because those parameters are not in normal X/Y axis tables. They are instead hard coded in the logic. You cannot change that part of the tune on a RFE transmission.

Without a log i cannot tune any of them : )

Quote:

---

Originally Posted by LilSick

i am not experienced with THAT fully electronic TRANS

not like i am with the fully electronic zf8's

i understand those very well

prolly better than i understand the ole 727 and its lil brother the 904

i have some experience tuning 46re and 48re but am not pro

here is what i know:

The only logic in the JTEC+ for the RE transmissions is governor pressure = 1 PSI per MPH. When in 4x4 low they limit pressure to 15psi to keep the trans from shifting to anything higher than 2nd gear. Shift timing = line pressure+shift spring vs governor pressure. Line pressure = spring pressure + throttle valve (which adds additional spring pressure) to raise line pressure (based on throttle). You can buy spring kits (shift kits) to adjust shift timing to any RPM you'd like with a RE trans. The 904/727 from the early 60s to the end of the RE trans in the early 2000s all use the same springs, majority of parts can be swapped throughout those years.

Transmissions such as the 45RFE, 545RFE, and 68RFE, are fully electronic so they must be tuned in the PCM OR TCM. They use no springs for control. Instead they use multiple electric solenoids to control shift timing and firmness. Those tables were not added to JTEC until 99 starting with Jeeps, when the 3.7/4.7 engines and the 45RFE trans came out.

HP tuners could not add options to tune the governor pressure vs speed value or torque converter lockup vs vehicle speed vs throttle position because those parameters are not in normal X/Y axis tables. They are instead hard coded in the logic. You cannot change that part of the tune on a RFE transmission.

Without a log i cannot tune any of them : )

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I appreciate that info!!
You got way more knowledge on trans than I do.
I?ve only ever messed with ford trans.
This is my first fully electronic trans I?ve messed with.
I can for sure get you a log if you are still interested.
Just gonna be a day or two.


Thanks for taking your time and explaining.
Manly didn?t wanna waste your time!
Im starting out with tuning and have mainly been learning as I go with trial and error.
This is the first dodge I?ve done.
It?s so far very different.
Have done some gm and some ford.