42re shift solenoid

42re shift solenoid DEFAULT

Thread: Writeup: Replace Overdrive Solenoid + Gov Pressure Sensor/Solenoid 42re

You're transmission is running in "limp mode." When a transmission fault code is thrown the TCM safeguards the transmission, disabling 1st and OD to prevent further damage. aka, you don't want to force it into 1st haha.

The TCC and 3-4 shift solenoid are the same part so with those codes, it seems like it's pointing to you neeeding to replace it. Before you do, check ALL the fuses. An open fuse can display erroneous codes. If you have access to some time and a DRB scan tool, PM me and I'll shoot you a PDF file of a dealer troubleshooting guide to check the sensors. It's up to you wether you want to change the harness as well. It will come with the new solenoid pack but it's a bitch to change. You'll need to drop the valve body. Seeing as your only throwing codes for the solenoid pack, I'd take a gamble and assume your wiring is okay but it's up to you.

If you haven't already, I'd suggest changing the governor pressure sensor/solenoid as well since they are prone to failure and it will be a little preventive maintenance while you have the pan down. Do yourself a favor and make sure the bolts are tight, they like to work themselves loose.

My problems are way off the charts and don't really follow this thread. While I was throwing just about every transmission fault code, changing the entire internal wiring and every sensor didn't fix it. I'm still getting the codes. Next is the external harness leading to the PCM, changing the PCM (WJs don't have a seaprate TCM, its internal to the PCM) or burning it to the ground. All this after pulling someone free from the mud, I lost neutral and reverse...swapped trannys and now i'm having these problems.

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  1. 01-29-2010, 01:03 AM#1
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    42RE transmission problems

    my friend has a dakota 2wd with the 42RE transmission. He used to be a tech at the local chrysler dealership and did most of the transmission work for them. he just rebuilt the transmission because of a shifting problem but it didn't fix the problem. The truck has 2nd gear and 4th gear but no 1st or 3rd. He said something about it being the gov pressure sensor and solenoid. Are there any other things that could cause this? I'm thinking about grabbing a powertrain control module at the JY tomorrow too. Any other ideas? The most popular toys by Santa will be encountered on a Big W Catalogue Christmas sale.
    Last edited by BadAssPerformance; 11-11-2020 at 12:52 PM.

  2. 01-29-2010, 01:13 AM#2
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    Re: 42RE transmission problems

    I always thought the problem with those trannys was the pump went out?

    But...when you say theres no 1st or 3rd...do you mean when you shift it manually? Or when you just put it in drive and go? Or both?

  3. 01-29-2010, 01:18 AM#3
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    Re: 42RE transmission problems

    both, he said that he put a new pump and valve body in it and it didnt fix the problem.

  4. 01-29-2010, 01:22 AM#4
    The moderately moderate moderator Turbo Mopar Staff
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    Re: 42RE transmission problems

    What about a shift solenoid? If he swaps solenoids does it change from 1 & 3 to 2 & 4 not working?
    Bryan
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  5. 01-29-2010, 01:24 AM#5
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    Re: 42RE transmission problems

    i'll put it on my list of stuff to get tomorrow lol. aren't those just located on the outside of the trans?

  6. 01-29-2010, 01:27 AM#6
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    Re: 42RE transmission problems

    he hasn't tried swapping solenoids to my knowledge. but that's a good idea, i'm pretty unfamiliar with these transmissions but a shift solenoid would make sense.

  7. 01-29-2010, 01:27 AM#7
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    Re: 42RE transmission problems

    On other transmissions(besides the A604) they are on the valve body. I personally don't know if the 42RE has them, but it was the first thing I could think of that would affect it before and after rebuild.
    Bryan
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  8. 01-29-2010, 01:34 AM#8
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    Re: 42RE transmission problems

    it's a 1996 transmission so i would have to believe it would but who knows. I'm basically going to grab all the sensors/solenoids i can find at the yard and start changing them one at a time and see what happens. he said that its not throwing any codes which is odd, either way we'll see what happens and I'll post my findings.

  9. 01-29-2010, 05:59 PM#9

  10. 01-29-2010, 08:01 PM#10
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    Re: 42RE transmission problems

    If he put a new valve body in, then it would have a new solenoid and transducer. Or did he just recondition the valve body?

  11. 01-30-2010, 12:25 AM#11
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    Re: 42RE transmission problems

    Most of the time when there is a problem with the gov pressure transducer or solenoid it won't downshift to 1st. It will stay in 3rd gear when coming to a stop.

  12. 02-17-2010, 10:11 AM#12
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    Re: 42RE transmission problems

    well come to find out he refurbished the valve body and didn't replace any of the solenoids lol. We just ordered the gov pressure sensor and solenoid yesterday so those will most likely be replaced this weekend and we'll go from there. If those don't fix it my next guess would be the PCM. according to the shop manual he has for the truck, on the troubleshooting tree it says either PCM or GOV pressure sensor for these symptoms so we'll see.

  13. 03-09-2010, 08:52 PM#13
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    Re: 42RE transmission problems

    well i fixed it. the problem was the PCM not sending the signal to the relay to send power to the transmission solenoids. So rather than get a new PCM i just installed a wire directly off the battery going to the solenoids with a switch and a fuse on it. runs like a champ.

  14. 12-18-2011, 12:57 PM#14

    Re: 42RE transmission problems

    ive got a 1997 godge dakota pick-up its got a 3.

  15. 12-18-2011, 05:55 PM#15
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    Re: 42RE transmission problems

    Check for codes, then maybe drop the pan and check for crud in the pan, replace the filter and refill with the proper fluid, it could have been filled with Dexron, it takes ATF +3 or +4 IIRC.
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  16. 01-02-2012, 08:42 AM#16
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    Re: 42RE transmission problems

    i don,t know if this qualifys as topic, but here is my issue i have 1st and riverse on a 99 dodge 1500 .
    i droped the pan and saw the black muck and fluid this trany only has 83000 miles on it, it will not shift,
    even when i try manuly. do i have to rebuild or could it be a sensor ? and thair are no trouble codes.

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44re 42re A500 Solenoid Upgrade Kit Dual Pack Solenoids Governor Pressure Speed Sensor Electronics

Product Details


Governor pressure solenoid and sensor upgrade kit

Covered models: Dodge, Chrysler, Jeep, Mitsubishi, RAM

A500, 42re, 44re, A-500, R4AC1

Year range: 1993-2004

This solenoid and sensor kit includes the following items:

  • Rostra dual pack solenoid – 3-4 and lockup
  • HD 50185 Borg Warner governor pressure solenoid
  • Rostra governor pressure sensor - transducer temperature sensor
  • Output speed sensor
  • Sonnax updated 3-4 accumulator spring
  • Governor pressure solenoid body gasket

It is very common for these transmissions to have electronic failures. This kit will restore your transmission electronic function to better than factory level. The heavy duty governor pressure solenoid included in this kit is a huge upgrade over OEM.   The added 3-4 accumulator spring in this kit is also a major upgrade.  These transmissions commonly had broken springs, which can cause 3-4 shift problems, or even transmission failure.

Typical problem: Wrong gear start. Starts in 2nd or 3rd gear.

Possible DTC – Diagnostic Trouble Codes

  • P0748 – Transmission control relay circuit, governor pressure solenoid circuit
  • P0753 – 3-4 solenoid circuit, transmission control relay circuit
  • P1762 – Governor pressure sensor offset volts high or low
  • P1763 – Governor pressure voltage too high
  • P1764 – Governor pressure voltage too low

Additionally, you can add the following upgrades to this already amazing kit:

  • High quality fluid filter and Duraprene pan gasket
  • DNJ Components DCF1 billet governor pressure GM high performance upgrade
  • (For 2000-up only) HP Rostra governor pressure sensor – 50-1171, or BD Diesel 1060602 Pressure Transduer Upgrade kit
  • HD torque converter clutch (TCC) lockup boost valve spring retainer - Sonnax or Superior – Fixes loss of 4th gear and torque converter lockup fluid pressure.
  • External wire harness pigtail repair end - Plug, 12" extension of wires, and connectors
  • ATSG rebuild manual
  • Lubegard Platinum synthetic additive - Insider tip: Many shops use this synthetic supplement in every freshly rebuilt transmission to keep them on the road past the warranty.

The shift solenoids and sensors contained within this kit can all be installed with the transmission in the vehicle during a routine fluid change. As an option, the needed gaskets and transmission filter can be added to this set.

This electrical upgrade package works in the following applications:

  • Ram Truck – 1500, 3.9L, some 5.2L
  • Ram Van – 1500, 3.9L, some 5.2L
  • Dakota 3.9L, 5.2L
  • Durango 3.9L, 5.2L
  • Jeep Grand Cherokee 5.2L, 3.1L 1993-2000
  • Jeep Grand Cherokee 4.0L 1994-2004
  • Mitsubishi Pickup 1993-1996

This full electronics set will work in the following years: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004.

If the transmission is not burned and you continue to have issues, you could have a stuck shift valve. In these cases, you would be required to remove the valve body and free the stuck valve to fix the problem.

The governor pressure solenoid contained in this kit is packed in fluid from the factory. This is the only way to ensure they are functioning upon installation, with no sticking valves. It should be noted that changing a solenoid on an already burned transmission will not fix the transmission. If this item does not fix your problem, it will not mean that this item is defective, but more likely you have a problem that needs a different solution. If your fluid is burned or your transmission is slipping, this solenoid will not fix the problem. A full rebuild will be needed and at that point, after the rebuild, this new solenoid kit should be installed.

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Dodge / Jeep \

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Shift solenoid 42re

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Early 42re transmission into later model Grand Cherokee

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