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Old 11-11-2019, 11:07 AM
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1998 Manual to Auto Conversion

Hey all,

Looking for some advice before I under go a manual to auto conversion in my 1998 TJ. My Wrangler started life out as an auto and the previous owner had converted it over to a manual. I have been driving it as a manual for the last 5 years that I've owned it. In the time I have owned it I have had to make corrections to almost everything the previous owner had done, to addressing ghetto lift kit issues, track bar issues, control arms, etc. the list goes on and on. So now making the Jeep an auto again shouldn't be a difficult process, however I am scared about what I might encounter as far as how to previous owner went about the swap. Like I said before, he seemed to take the easy way out of everything and didn't really take his time doing any work the right way.

I know the general opinion is going to be to trade for an auto, or to sell my manual and then go buy an auto, but I own the Jeep as of right now, have a 3rd car I can daily while I'm undertaking this project and living in upstate NY finding a rust free is not easy. My Jeep is from TN and spent most of its life in either TN or AL so it is virtually rust free. Not to mention the fact that I have a sentimental bond with it after correcting all of the previous owners hiccups that I incurred after I bought it.

Anyways, to do the swap I am thinking I will just buy a donor totaled TJ and start the swap from there. I have read many of the forum write ups on doing the swap and it seems pretty straight forward. I am wondering if there is anything I should do while I have the tranny and transfer case out. Do automatics need SYE? Will I need to adjust pinion angle after the swap is completed? Essentially I am wondering what changes are going to have to be made to my driveline, after the swap is complete and anything that would be good to do while the trans and xfer case is out. I am set on the 3 speed auto, so not really looking for opinions in that regard, more so just looking to see what I am getting into and what I should do while im doing the project. Thanks for your input.

Colby

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Old 11-11-2019, 12:21 PM   #2
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Doing a 3 speed auto or a aw4 from an xj

What part number is on your PCM

You will need different driveshafts




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Old 11-11-2019, 05:18 PM   #3
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Going to follow along - interested in doing this also
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Old 11-12-2019, 02:22 AM   #4
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I'll write more Tuesday or Wednesday but I did a conversion to the 32RH on my 97 and it was a weekend job. Great conversion, it was the best mod I've done over the past 23 years of TJ ownership.
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Old 11-12-2019, 11:57 AM
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awesome, thanks jerry, i was hoping you would reply to this thread. Ive read everything you've posted about the swap that I can find on all the forums. I look forward to hearing back from you. Thanks again.
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Old 11-12-2019, 05:45 PM   #6
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If you've read everything I've posted I'm not sure what I can add. Perhaps I didn't post that you'll also need a different transmission mounting bracket for the 32RH, should be p/n 52058548.

If you don't want to have to remove the clutch pedal, you can weld it to the brake pedal as I did for more easy left-foot braking while rock crawling and using your right foot for the gas which can make crawling easier. You can see the piece of scrap steel I welded between the pedals below.

Also you'll need the automatic version of your PCM/ECM so it the lockup torque converter can be controlled. Hopefully the previous owner left the wiring in place the the TCC and NSS connectors.

A transmission jack will make the job much easier than a floor jack will since a transmission jack makes minute angle changes while supporting the transmission far easier. I bought one from Harbor Freight and it worked very well.

The shifter is an easy conversion, should be no issues there. Adjusting the TV (kickdown) cable length is just a matter of adjusting the cable position at the throttle body so all the slack is removed from the cable without it actually pulling on the cable when the throttle is at rest.

Oh, you'll need six Mopar J3151407 bolts to hold the torque converter to the flex plate, standard bolts won't clear. No worries, those bolts can be found with Google.
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