post #16 of Old 10-30-2012, 06:40 PM
ratmonkey
R.I.P.
 
ratmonkey's Avatar
1997 ZJ 
 
Join Date: Dec 2006
Posts: 19,793
Quote:
Originally Posted by NC_ZJames View Post
In the Dodge's, the PCM programming was different between between the two different styles, the values the sensor picked up are different and would also use the solenoids to control the pressures different. You could connect the plug on the transmission on an older truck, but would cause it to go into limp mode if it had the newer sensor/solenoid in it.

Searching for the 42re valve body, it comes up with only two different versions. One with the old style electronics and one with the new style, all internal parts are the same.
they have different springs, separator plates, and switch valves. any good shift kit for "all years" includes parts specifically for the different valve bodies. there were at least 3 revisions during the zj years.


'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

ratmonkey is offline  
post #17 of Old 10-30-2012, 08:05 PM Thread Starter
azvinnie
Registered User
1948 CJ2A 
 
Join Date: Oct 2012
Location: Apache Junction
Posts: 11
Thank you all. This is really great info.

So would a new trans case with the old valve body/sensor work? I haven't seen the inside of an electronic trans so I don't know if it's possible... last auto trans I rebuilt was a 727 in the early 80s.

unfortunately the 97 does not have a flashable ECM so it sounds like the other option would be some sort of aftermarket TCM (ie megashift. see http://www.msgpio.com/manuals/mshift/index.html for those that don't know what I'm talking about).

Thanks again. Great info!
azvinnie is offline  
post #18 of Old 10-30-2012, 10:01 PM
JrMechanic
Registered User
1993 ZJ 
 
Join Date: Oct 2008
Location: Lima, Ohio
Posts: 3,370
If the valve body is the only difference in a WJ 42re, use the valve body from your current transmission after you've installed a Superior, Fairbanks, Transgo, or Sonnax shift kit. Problem solved.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
JrMechanic is offline  
post #19 of Old 10-31-2012, 02:52 AM
SpikeDude
Registered User
 
Join Date: Jan 2009
Location: Fredericksburg
Posts: 121
I wonder if this could turn out to be a ultimate fix to the common 42RE's going bad? Would love to see if this works! Is it common for WJ 42REs to go bad like the ZJs? If not I kinda wonder why...

1999 Dodge Neon, SOHC, 5spd. Totaled
1997 Jeep Grand Cherokee Laredo, 4.0L, Selec-Trac, 30" BFGs. Cash for Clunkers :(
1993 VW GTI, SOHC, 5spd. Sold
2005 Dodge SRT-4, aka "POS", build in progress...
SpikeDude is offline  
post #20 of Old 10-31-2012, 05:06 AM
ratmonkey
R.I.P.
 
ratmonkey's Avatar
1997 ZJ 
 
Join Date: Dec 2006
Posts: 19,793
Quote:
Originally Posted by SpikeDude View Post
I wonder if this could turn out to be a ultimate fix to the common 42RE's going bad? Would love to see if this works! Is it common for WJ 42REs to go bad like the ZJs? If not I kinda wonder why...
Yes, all year 42re's break in similar fashion. The later solenoid lasts a Little longer, but as he said, doesn't work with the earlier computers.


This line of thought won't do anything but spend your money on no improvement.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

ratmonkey is offline  
post #21 of Old 10-31-2012, 07:30 AM
SpikeDude
Registered User
 
Join Date: Jan 2009
Location: Fredericksburg
Posts: 121
Well darn...

I did find this awesome site in another thread that searches JY's near you for parts I found rebuilt trannys for $450!!! So... I might just get a spare tranny and keep it around in just in-case

1999 Dodge Neon, SOHC, 5spd. Totaled
1997 Jeep Grand Cherokee Laredo, 4.0L, Selec-Trac, 30" BFGs. Cash for Clunkers :(
1993 VW GTI, SOHC, 5spd. Sold
2005 Dodge SRT-4, aka "POS", build in progress...
SpikeDude is offline  
post #22 of Old 10-31-2012, 08:01 AM
BoostinChick
Registered User
1998 ZJ 
 
Join Date: Mar 2012
Location: West Chester
Posts: 385
There is truth to a few comments in this thread. I have a 97 ZJ and the transmission was cracked. I picked up a 94 42RE and even then there were a few tweaks. The dipstick is on the opposite side, so had to come up with a makeshift bracket to bolt it to the block/housing. My only other concern would be how it bolts to the tcase, if its the same and the input shaft sizing.

Check Craigslist and local junkyards. A few near me have sales every now and again where you could pick up a trans for $100-200 and it comes with a 1-year warranty. I found my trans and NP231 tcase together for $200!

1998 Jeep Grand Cherokee 5.9L
BoostinChick is offline  
post #23 of Old 10-31-2012, 09:00 AM
LordHobbit
Registered User
1993 ZJ 
 
Join Date: Aug 2009
Location: Oregon
Posts: 2,029
Quote:
Originally Posted by SpikeDude View Post
Well darn...

I did find this awesome site in another thread that searches JY's near you for parts I found rebuilt trannys for $450!!! So... I might just get a spare tranny and keep it around in just in-case
Do you mind posting that link here please?

93 red ZJ 190k 4.0. Spent more money than I should have ...

Isn't red the only color a vehicle should be?
If at first you don't succeed, use more speed.
LordHobbit is offline  
post #24 of Old 10-31-2012, 09:46 AM
ratmonkey
R.I.P.
 
ratmonkey's Avatar
1997 ZJ 
 
Join Date: Dec 2006
Posts: 19,793
Car-parts.com
Thought everyone knew that

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

ratmonkey is offline  
Reply

Tags
42re , grand cherokee , stroker , wj , zj


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome