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Old 05-11-2009, 11:54 AM   #1
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Manual to Automatic Transmission Conversion

Hey Folks, this is my first post here. I'm not a mechanic or anything resembling one so forgive any ignorance.

I have a 2000 4.0L Wrangler, 5 speed manual transmission. My wife was diagnosed with MS close to 3 years ago and we've gotten to the point with her handicap where I'm either going to have to trade it in on something automatic, or get it converted to automatic so she can drive it.

From you pros out there, should I even be considering a transmission conversion here? Can it be done without a huge cost associated? Its got 92k miles on it and it runs great, have had to do very little maintenance on it over the years and I love not having a car payment.

-John

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Old 05-11-2009, 12:24 PM   #2
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First John, a big welcome to WF! Second, and more importantly, I'm sorry to read of your wife's MS diagnosis. I have a friend who was diagnosed about the same time and I realize it's a tough thing to have to live with for both of you.

So far as your conversion goes, I did converted my '97 from the same 5-speed you have to the 32RH 3-speed automatic transmission. That's the same transmission Jeep used as its OE automatic transmission through 2002 and it's a very rugged and dependable transmission so long as you don't flood it with water by crossing water that is too deep. It's pretty much a bolt-in job once you get all the parts, though you do also need to swap the TJ's engine computer for one out of the same model year TJ and same engine but one that had the automatic. This is because the automatic needs the torque-converter lockup signal that is only provided by a computer (ECM) programmed for an automatic.

I did my conversion in a weekend and it wasn't technically difficult. You'd need the automatic style engine computer (ECM), 32RH transmission, new transmission mount, shifter, shifter cable, flexplate, and the hard coolant lines that connect the transmission to the radiator which already contains ports for the transmission. Also make sure the 32RH includes the torque converter and the little unique bolts that secure the flex plate (similar to a flywheel) to the torque converter.

I paid $800 for my used 32RH which included everything including a radiator I did not need, though it did not include the ECM.

I'd hit up some junkyards and have them pull all those parts and make sure they give you all the hardware they removed to if they pull it out of a TJ for you.

Incidentally, going to the automatic really transformed my TJ so far as its offroading goes, it helps a lot on the tough stuff. One more thought... since you won't have overdrive with the 32RH like you do with your present 5-speed, your engine rpms will be higher which can be fixed with either larger tires or gearing your axles to a slightly higher ratio.

Good luck with everything.

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Old 07-09-2009, 09:26 PM   #3
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Sorry to bump an old thread but I'm considering doing the same thing with my 5 speed Wrangler, the only difference is that mine is a 2001. I don't do any off roading and am just using this for a summer cruiser/vehicle to pull my single jetski or single atv with, so no heavy duty pulling. Is the swap for the 2001 4.0L the same as for the 2000? I know that I have the nv3550 tranny now and will be swapping to the 32rh. It definitely seems from the reading that I have done so far that the conversion is around $1000 for all the parts and such...

I've had my eye out for an automatic 4.0 but I haven't seen anything that compares to mine. My Wrangler is a 2001 with only 61,000 miles on it, all the automatic's around have 120,xxx + and are listed in the 6k + range.
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Old 07-09-2009, 11:09 PM   #4
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That all depends on where you are located... as i have an automatic in my jeep and am looking to swap to a stick... (2005, 4.0, under 60k for miles)
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Old 07-10-2009, 12:39 AM   #5
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Sorry bmanrkg2 but the automatic in your 2004 is a 42RLE transmission which is computer controlled and would be a nightmare to install into his 2001. Consider a swap between a 2002 and older and 2003 and newer to be pretty much a non-happener.

CDodge04, you need to stick with a '97 to 2002 automatic transmission known as a 32RH) to make the swap a reasonable thing to get working. And yes the swap for any TJ from 1997 to 2002 is about the same in terms of parts needed. You only need an engine computer for your model year and engine type that is set up for an automatic to make it work. Even all the wiring needed to make it work is already there and ready to be plugged into.
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Old 07-10-2009, 06:24 AM   #6
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Thanks for confirming for me guys!

I'm going to make some calls today to find out what the 32rh is going for around here...just for the record I'm from Maine.

I'm looking forward to swapping over, I know my wifey will be a lot happier with the automatic! When the wifey is happy, everybody is happy haha.
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Old 07-12-2009, 11:06 AM   #7
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Sorry to hear of your wife's MS, I also have MS, was diagnosed 6 yrs ago and the best thing that happened to me was my daughter started to drive and would not drive a stick so I bought a '02 with auto and I now love it, had a '97 stick. The only regret I have is that it is not a 4 spd auto. revs a little high and a little doggy.
Happy wife, happy life
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Old 07-12-2009, 01:34 PM   #8
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i have an 02 i wanna make a stick.
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Old 08-06-2010, 10:57 AM   #9
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Manual to Automatic Transmission Conversion

(Sorry bmanrkg2 but the automatic in your 2004 is a 42RLE transmission which is computer controlled and would be a nightmare to install into his 2001. Consider a swap between a 2002 and older and 2003 and newer to be pretty much a non-happener.)

Is this true? Mine is a 2003 and i would like to swap it over, is there any other way to get it done?
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Old 08-06-2010, 11:04 AM   #10
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(Sorry bmanrkg2 but the automatic in your 2004 is a 42RLE transmission which is computer controlled and would be a nightmare to install into his 2001. Consider a swap between a 2002 and older and 2003 and newer to be pretty much a non-happener.)

Is this true? Mine is a 2003 and i would like to swap it over, is there any other way to get it done?
Thread revival....anywho. Its really not worthwhile, you'll have better luck finding a different jeep.
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Old 08-06-2010, 01:07 PM   #11
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Can the donor vehicle be a XJ by any chance? If so I would be able to use a lot of stuff like the transmission, computer, and the high pinion D30.
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Old 08-22-2010, 03:57 PM   #12
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I have a manual tranny and think my computer went bad... do any of you that made the switch to an auto transmission still have the computer you took out of your Jeep when it was set up as a manual? If so please let me know. I am interested in buying the computer. I have a 2001 4.0 Wrangler. My cell is 407-770-8281. Robert.
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Old 10-26-2010, 11:04 PM   #13
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04 wrangler auto to 05 manual 6 speed

I'm helping a buddy who converted an automatic 04 wrangler to a 6 speed from a 05. he has several codes p0706 shifter signal, p0750 lr solenoid circuit, p0846 2-4 pressure switch ,p0871od pressure switch, p1899 park/nuetral switch. any idea on how to get rid of them? maybe replace the ecm, or fake the sensors?
thanks for any help
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Old 10-26-2010, 11:20 PM   #14
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The only way you're gonna get rid of those codes is to replace the present PCM (aka ECM on older vehicles) programmed for an automatic for another PCM programmed for a manual transmission. As it is now, the PCM is looking for sensor input signals and codes from the auto tranny's computer and it's not gonna get them from the new 6-speed manual transmission. You can find replacement (rebuilt) PCMs on eBay.
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Old 01-14-2011, 07:21 AM   #15
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I just bought a 2000 Wrangler TJ that was converted from manual to automatic. It runs good but I have one little concern: Often I see the little arrow light, (the one that tells you it is time to shift on manual transmissions) on the dashboard come on, and the jeep starts jumping a little like looking for that next gear. Is this normal or could it be that whoever made the change forgot to change the computer or installed the wrong one.

Thank you for your input in advanced,

Julio
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Old 10-31-2011, 10:08 AM   #16
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Hi, i was wondering if it would be possible to convert my 09 wrangler from manual to automatic. what would i need to purchase inorder to actually accomplish this?
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Old 03-20-2013, 12:48 PM   #17
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Hey there

Quote:
Originally Posted by CDodge04 View Post
Sorry to bump an old thread but I'm considering doing the same thing with my 5 speed Wrangler, the only difference is that mine is a 2001. I don't do any off roading and am just using this for a summer cruiser/vehicle to pull my single jetski or single atv with, so no heavy duty pulling. Is the swap for the 2001 4.0L the same as for the 2000? I know that I have the nv3550 tranny now and will be swapping to the 32rh. It definitely seems from the reading that I have done so far that the conversion is around $1000 for all the parts and such...

I've had my eye out for an automatic 4.0 but I haven't seen anything that compares to mine. My Wrangler is a 2001 with only 61,000 miles on it, all the automatic's around have 120,xxx + and are listed in the 6k + range.

Any chance you still looking for a 2005 Stick shift tranny with 83,000 miles to swap with an automatic ?? Thanks
Scott
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Old 08-15-2013, 09:02 PM   #18
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Manual to an automatic.

I have a 2003 5 speed Wrangler Rubicon that i badly want to turn into an automatic or im going to have to get rid of it. is this possible?
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Old 08-15-2013, 09:05 PM   #19
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Yep it's possible, you'll just need a new PCM, Transmission Computer, PCM to Transmission Computer cable, and the mechanical parts.... transmission mount, shifter & cable, flex-plate to replace the flywheel, etc.

It's a major undertaking but I did it to my '97 & it worked out well. But with a newer TJ like yours which is a bit more complex than my '97 was, I'd seriously consider selling it & buying one with an automatic already installed.
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Old 08-15-2013, 10:22 PM   #20
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I have a 2003 5 speed Wrangler Rubicon that i badly want to turn into an automatic or im going to have to get rid of it. is this possible?
I have a Auto Trans from a 04 Rubicon coming to me next week, I will have everything from the block back, no linkage, no computer...but I can get in touch with the shop that has the jeep to see if they still have those parts
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Old 08-16-2013, 12:29 AM   #21
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I have a 2003 5 speed Wrangler Rubicon that i badly want to turn into an automatic or im going to have to get rid of it. is this possible?
I did my 99 2.5 but I went from auto to manual. This is what I had to switch. Floor shifter. Floor tunnel cover(what the shifter bolts too) Had to remove the trans cooler lines in your case add them. Interlock cable from the shifter to the ignition not required unless you don't want to shift into gear with the key off. The shifter itself shifter cable. Transmission transfer case. I used a different drive line because my setup came out of a yj should be the same for you. Trans mount plate for me but yours should bolt to straight to the trans. Flywheel different length bolts that hold the transmission to the engine and a computer out of an auto. And a petal set unless you want to confuse anybody driving it also kick down cable. This should be every thing you need. It took me Two days to do the swap but about two months to source the parts. But I did it all for about 800. But I practically lived on craigslist to get the good deals first. I used most of the hard parts from a yj the petal set and "wearable" parts had to come out of a tj. That for a 4 banger though hope this helps you.
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Old 02-25-2014, 12:17 AM   #22
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1988 converson from manual to automatic trans question

Sorry for asking the same question but I have a 1988 Jeep Wrangler with a 4.2L and a manual transmission. I would like to convert to an automatic for my 16yo daughter. Any issues I my run into? Also, what transmission do I need?
Thank You
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Old 02-25-2014, 09:22 AM   #23
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The easiest would be a 32RH automatic, which I did a conversion to in my TJ years ago, that was used back then but you'd have to get more advice about your earlier YJ. Your '88 didn't come with a computer that could control the lockup torque converter that is in later model 32RH autos. That may mean, I don't know for sure, that you may have to get an early 32RH without the lockup torque converter. I'm really only totally up on that conversion process with '97 or newer TJs.

I'm a huge fan of automatics but as I did with my then 16 year old daughter (now over 30), I would just teach her how to drive that stick shift. It took her a couple hours to learn with me sitting next to her but that's a lot easier than converting to an automatic.
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Old 02-25-2014, 12:59 PM   #24
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I'm not positive, but I think the 88 came with the TF904, or the TF999. No computer controls that I know of, but no lockup either.
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Old 03-01-2014, 07:55 AM   #25
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I have a 96' auto transmission out of a Cherokee with complete wiring harness from lights to dash , and computer complete. It had a I6 Motor . If you can use it JohnnyMac I'M. Me..
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Old 03-01-2014, 10:55 AM   #26
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I have a 96' auto transmission out of a Cherokee with complete wiring harness from lights to dash , and computer complete. It had a I6 Motor . If you can use it JohnnyMac I'M. Me..
That's an AW4 which is a great transmission and many have been retrofitted into Wranglers but it's not an easy bolt-in conversion.
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Old 03-15-2014, 01:06 PM   #27
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That's an AW4 which is a great transmission and many have been retrofitted into Wranglers but it's not an easy bolt-in conversion.
Oh- I didn't know if there was a difference .. You're welcome to it if you can use it as a trade , or conversion , or whatever you can use it for ?? I'm in S.C.
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Old 03-15-2014, 01:27 PM   #28
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Sorry for asking the same question but I have a 1988 Jeep Wrangler with a 4.2L and a manual transmission. I would like to convert to an automatic for my 16yo daughter. Any issues I my run into? Also, what transmission do I need? Thank You
That sounds like a ton of work and money . With CPUs and sensors + equipment. Your better off just teaching her how to drive it. And have peace of mind she can drive anything on wheels and let her get some cool points for being a girl who knows how to drive stick
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Old 04-29-2014, 11:05 AM   #29
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1998 Jeep Wrangler Automatic to Manual Transmission

HEY LIVERMORE MIKE

It is my first time here and apologize bumping in.
I have a 1998 Jeep Wrangler 4.0 L sport with Automatic Transmission.
I am considering maybe swapping my Jeep with your 1998 Jeep with Manual Transmission.
Let me know if you consider it.

Abuknight
(530)400-3219 or toyomxxx@yahoo.com
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Old 05-23-2014, 07:49 AM   #30
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With this Change in a earlier TJ (97-02) going to the 34RH out of a TJ, Will the Transfercase, And stock Drive shafts still work with the New Auto Tranny?

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