Chrysler 45RE

[Oysteinbno]

Is there anyone that have tried to hook this to a Chrysler 45RE, or 46RE

[UnaClocker]

Is it anything like the 41te? Got any tech documents on it? Check out the "Control Methodology" part of my wiki, and compare it to yours. In theory, the 45re would be the same trans, just level 5 torque handling instead of level 1, and RWD rather than traverse (FWD).. Just like the 727 is directly related to the 31th/A413.. My wiki is here

[UnaClocker]

Also, if it's nothing like the 41te, check out the 47re thread.

[johnboy426]

There is no 45RE. There is a 45RFE and it operates much like the 41TE. It has seven solenoids, a temperature sensor, a five wire PRNDL code plate, two external VR speed sensors, and an external pressure line pressure sensor to control transmission operation.

LR/CC, UD, OD, 2C, 4C, and MS (multi-select) are the solenoids for controlling clutch operation. The other solenoid is for line pressure control.

There is a 68RFE transmission used in diesel applications which uses the same valve body as the 45RFE, but it has different hardware requiring a different order of application by the solenoids.

The RE series of transmissions includes the 42,44,46,47, and 48RE transmissions. These transmissions use three solenoids, a temperature sensor, a pressure transducer, and one external VR speed sensor. Two solenoids are simple on/off operation for 4th gear and TCC. The third solenoid is used for governor pressure and is monitored by the pressure transducer. Early year models used a VSS mounted in the tailshaft. The VSS was phased out of production through year models 1996-97. Later year models used an external MUX PRNDL to indicate shift position to the instrument cluster. The PRNDL was phased in during the 2001-02 production.

I drive a 45RFE equipped vehicle daily and would offer it as a test vehicle after the 41TE code is written and tested. I will be driving the 41TE equipped vehicle daily while testing the 45RFE vehicle.

[UnaClocker]

Seven solenoids? Wow. The 41te only has 4.. One of them serves double duty as TCC control (once into 2nd gear, a shuttle valve moves over and allows it to be used for TCC operation). So much for these things all being exactly the same.
Do you have a chart of which solenoids are energized for each gear? Maybe it's just a case of having more clutches, so it has more solenoids, but if they're driven in groups, it may work the same as the 4 solenoids of the 41te..

[Oysteinbno]

Thanks for this informatin. Very usefull.

[johnboy426]

Seven solenoids? Wow. The 41te only has 4.. One of them serves double duty as TCC control (once into 2nd gear, a shuttle valve moves over and allows it to be used for TCC operation). So much for these things all being exactly the same.
Do you have a chart of which solenoids are energized for each gear? Maybe it's just a case of having more clutches, so it has more solenoids, but if they're driven in groups, it may work the same as the 4 solenoids of the 41te..

Same, same. The LR solenoid also serves as the CC solenoid along with the solenoid switch valve. The transmission is an outgrowth of the 41TE. The input clutch assembly looks like one from a 41TE on steroids. The big differences are: one solenoid for line pressure control just like the late model 41TE (phased in 2007-08), line pressure sensor, the 2/4 is split into seperate solenoids 2C and 4C, the multi-select solenoid or MS.

I will email you a bunch of information for the wiki or wherever.

[UnaClocker]

one solenoid for line pressure control just like the late model 41TE (phased in 2007-08), line pressure sensor

REALLY? That has definitely peaked my curiosity.. Looks like I may be on the lookout for an '08+ PT Cruiser transmission then.. Seems like having control of the line pressure would be very helpful.
As for the 45RFE.. I know the GPIO has 8 high current PWM drivers along the heatsink, but actually driving 7 solenoids, I dunno, probably possible..

[Oysteinbno]

Hi. Have anybody tried to GPIO on a 45 RFE yet?

[kaputnik]

Hi,

I am in the process to get the 45RFE running on MShift.

There are 7 solenoids in the trans, 6 for shifting/TCC and 1 for pressure control. Also we have a temp sensor, input and output speed sensor, pressure sensor and 5 pressure switches.
The switches are use to monitor the clutches and for clutch volume calculation according to the manual.

These are the things to work on:

* I have to measure the temp and pressure sensor curves , and count the teeth on the output shaft
* Software support for solenoid patterns depending on lever position and the shared LR/TCC Solenoid

The lever has PRND21 positions

This are Solenoid Patterns:

Lever in R
R - all off

Lever in R above 8MPH
Reverse block - MS on

Lever in P or N under 8MPH
P&N LR & MS on

Lever in N over 8MPH
N MS on

Lever in D
1[form N] MS & LR on
1[from rest or down shift] MS on
2 MS & 2C on
2P MS & 4C on
3 all off
4 UD & 4C on
5 MS,UD,OD,2C on
Lever in 1 or 2
1 MS & LR on
2 all off

From 2 to 5 gear the LR solenoid controls the TC Lockup
The reverse blocking isn't that important to me but the nice to have

I have the hydraulic schematics form the Dodge Ram Servicemanual if someone wants to take a look at.