[Kevin1990]

Wow, didn´t know that those TCM´s are that sensitive!

So i´ll just drive it every day. Hope the 1st - 2nd / 2nd - 1st troubles are going away....

Thanks for the professional help genlemen, i really appreciate it!

 

[Kevin1990]

A little feedback after 250 KM....

Didn´t changed it´s characteristics yet, but a problem appeared.....downshift to 1st is rumbling now. Like a pretty hard TC shudder (no, not the brakes).....didn´t had this before....now it´s getting truely strange...

 

[Kevin1990]

Edit:

What i forgot to ask.....will i also need the newer version of the solenoid block for the TCM?
Or are those 2 guys fine with each other?

 

[Oklahoma Wolf]

No, you don't need a newer solenoid pack for the new TCM.

Very strange about the rumbling.

 

[Kevin1990]

OK thanks!

I´ll clean out the in / output speed sensors tomorrow, just to see if and how dirty they are...

 

[bamman]

I'm going to revive this topic. I don't know if anyone realized the OP has a European A body. They got slightly different TCMs. Here are the factory part numbers:

4672217 (Up To 10-2-91) EUROPE
4672319 (Aft. 10-2-91) EUROPE

Both of these part numbers superseded to part number 4796136. According to the Chrysler Flash Availability (http://www.aa1car.com/library/2004/chrysler_pcm_flash_availability.pdf), the newest TCM for you is 4796136.

Even if you wanted to try a North American calibration, which should work I guess, you'll be looking for 4796123 or R4761848AA. The pictured of the TCM you got (R4761846AA) is for 89-91 cars.

Furthermore, if you did find the correct updated TCM, you need to remove pin 49 from the TCM connector as per FSM 18-24-95, to prevent random 3 to 4 upshifts or 4 to 3 downshifts when pressing the brake.

 

[valiant67]

Furthermore, if you did find the correct updated TCM, you need to remove pin 49 from the TCM connector as per FSM 18-24-95, to prevent random 3 to 4 upshifts or 4 to 3 downshifts when pressing the brake.

I have yet to find a car where pin 49 is populated. I suspect it may be a minivan only thing but I've never checked minivans to see if that pin is there for them.

 

[Kevin1990]

I'm going to revive this topic. I don't know if anyone realized the OP has a European A body. They got slightly different TCMs. Here are the factory part numbers:

4672217 (Up To 10-2-91) EUROPE
4672319 (Aft. 10-2-91) EUROPE

Both of these part numbers superseded to part number 4796136. According to the Chrysler Flash Availability (http://www.aa1car.co...vailability.pdf), the newest TCM for you is 4796136.

Even if you wanted to try a North American calibration, which should work I guess, you'll be looking for 4796123 or R4761848AA. The pictured of the TCM you got (R4761846AA) is for 89-91 cars.

Furthermore, if you did find the correct updated TCM, you need to remove pin 49 from the TCM connector as per FSM 18-24-95, to prevent random 3 to 4 upshifts or 4 to 3 downshifts when pressing the brake.

Wow thanks for info!

I drove arround 700 KM, nothing changed....

I´ll remove it right now, cause the shudder at a 2 - 1 downshift isn´t funny....

 

[bamman]

I've written a page on the various computers for both North American and Export vehicles at the following page:

https://sites.google.com/site/bammerichko/home/a604-software-update

I've also hosted the Chrysler TSB 18-24-95 on that page as well. Its a good read for anyone looking to upgrade their TCM.

 

[Kevin1990]

Thank you very much!

Interesting page, definatly!!

 

[Kevin1990]

Just found this:

http://www.ebay.com/itm/321000572783?item=321000572783&viewitem=&vxp=mtr

Should work or not?

If yes, any pre updating / programming necessary?
Cause it´s a NOS part...

 

[bamman]

That module should work in your application. However, I will note, that I have no idea what makes the European module different.

With that said, it should work in the since that it is the second best alternative to finding a 4796136 module.

As far as programming... that should be plug and play. No quick learn to deal with, and no setting pinion factor.

Just make sure there is no wire in pin 49 of your TCM connector if you use that particular module.

 

[Kevin1990]

Well thank you!

I´ll keep an eye on this one, maybe i find one 4796136 module as soon as possible.

So i just have to remove pin / wire 49 oin the connector?

Shoud be numbered in my "bible" of the A 604 (580 page version; 1989 - 1996) or how can i figure out which pin it is?

 

[valiant67]

It is unlikely there will be a pin in position 49, but if there is, remove it.
The book should have a pinout diagram in it.

 

[Oklahoma Wolf]

The connector should have a few strategic pins numbered - you can figure it out from those.

 

[Kevin1990]

OK thank you!

 

[Kevin1990]

Back again here...

The 2nd try is on it´s way, after a few weeks of searching it was relisted.

Part nr. R4761848AA / 4796123, NOS, never installed.

4672319 is the old (original) one.

I´m curious like a little child on christmas

 

[Kevin1990]

...New TCU built in, road testet, definatly works correct, 1-2, 2-3 shifts are same like before, bump is noticable, 3-4 / OD is perfect.

Downshift problems are gone now, nice, maybe i can correct the bumps, but i guess those are just worn out clutches...

 

[valiant67]

Give it some time, the computer may "learn" it's not hooked to a new unit and adapt top the lower fluid pressures and reduce the bump.

 

[Kevin1990]

Oh yes of course!
I just drove arround for maybe 50 KM, the bump into OD is completely gone, liek i said, also the downshift shudder, works fine !