manual to automatic transmission swap on jeep comanche

[krazycomancheowner0214]

I really need some help doing this swap I've got everything in for my 4x4 conversion but I don't think I can use the transfer case with my manual trans.how can I run the automatic trans without the wiring harness from auto jeep?? Thanks for all the help in advance

[Crash]

The only way to confirm that the case will work is make sure spline count is the same, and bolt the case to the trans and make sure it fits/turns smoothly. 

Otherwise, either a 2nd gear switch, and manually shifting your heep with the auto. Or Install an RADesigns rail shifter setup. 

[ParadiseMJ]

It'll make your life a whoooole lot easier if you go to the junkyard and get the entire engine side wiring harness from an XJ (easier to find) of the same year as your MJ...and the matching TCU.  Believe me, I've done this swap without really understanding how it all worked a few years ago and I futzed with it for way too long before realizing I needed the automatic wiring from the same year (era) as the truck...not the trans. 

 

It took me about 30 minutes to completely remove the harness with all plugs/connectors intact including the TCU.  I did not need to swap computers...I maybe should have but it all works fine as is.  

 

I put a 94 AW4 into an 88 MJ that had a 5 spd. BA/10.  Ha ha.  Since the gearing is 3.07 the AW4 is a bit doggy with larger (32ish) tires.  You might want to investigate that too.  With 235/75/15's on it, it's much better. 

 

I had to get a 91-95 23 spline t-case to swap in with it.

[dunnc1991]

Also getting close to this swap. I pulled the the trans/t-case from my 92 donor XJ, so I'm good to use the tcu from that? Need to get the engine harness as my donor came missing it's engine.

[Crash]

Should work fine.

[ParadiseMJ]

If the recipient is the 91 in your link, it should be fine.  If you're going to an earlier year, aka HO to Renix, you'd keep the Renix harness.  If it's 92 to 91 it should have the same wiring.