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Transmission Swap - AX5 for 30RH

4K views 11 replies 4 participants last post by  dajjnm 
#1 ·
I have probably spent 30 hours researching/reviewing Stu's site (although those swaps did not involved (30RH) and was thinking this would go easier than it has (I know....) doing this for my daughter, she loves jeeps, I bought a 98 TJ 2.5 that needed engine work, and she struggled with the stick so I bought a 30RH to drop in. Thought it'd be easier than the 32RH Jerry did. I know there are a lot of very knowledgeable people who post on these forums, and figured I could eventually find a solution if I search long enough....

Got the transmission with transfer case attached. Also got the wire harnesses, and PCM, and torque converter. Bought it all for $350 from a guy on Craigslist. I figured out it came from a 2000 TJ (based on the PCM code and comparing the wire connectors to the Jeep manuals on morris 4x4).

I had it running well before the swap. Put nice tires (31's) and wheels. Etc. Was going to drive it and let her have my car.....I'd love to have a nice jeep......anyway.

Swapped transmissions, I thought it went smooth. Jerry did not get the harnesses in his swap, so he wired the 32RH by making a harness. I decided to use the harnesses. My only problem was having to do it myself without transmission jack - would love to be able to buy those "toys" someday.....I tried figuring out how to make the park lock cable work but figure out I need a new steering column, adjusted the shift cable, put some new sensors in CPS, TPS, camshaft position sensor.

Right now, it cranks well. Jerry has indicated you have to get a PCM from the year of the vehicle and not transmission. The PCM is from a 2000. Before I buy a PCM (about $150 bucks) I want to make sure it is the PCM. Fuel pump not starting up when I turn the key on, no spark to plugs. Checked relays, ASD, Fuel Pump, by replacing with horn relay. Tried spraying starter fluid, it would try to catch but never did. I did find a thread about checking those two relays, very detailed, that included me looking to see if either relay had any voltage from the PCM (small amount, like.025 volts) and neither relay had any volts from the PCM. That thread suggested the PCM was "asleep."

My gauges aren't working (except for oil pressure that moves a little). Unplugged the CPS and that did not effect the gauges. Plugged OBD11 in and it came back with error unable to connect message.

Any help or suggestions would be appreciated. If I need a PCM from a 98 AT TJ then I'll order it, I just don't want to spend the money unless I have too. At this point, I was going to order one but decided I would ask folks on this thread. Thank you in advance for any thoughts.
 
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#2 ·
You should receive more response in this TJ Tech Forum.
 
#4 ·
wanted to provide some additional information, I am following this thread: http://www.wranglerforum.com/f210/no-start-tj-yes-another-one-1087258.html

Check 12 v to ignition coil - no power to either side, when crank the auto shutdown relay gets .15 volts
Check horn see if works horn - not working
Clean all grounds - done no effect
Unplugged CPS – gauges did not work and no CEL done - no effect
Jumped ASD and Fuel relay - heard fuel pump, no start done
Check is ASD functioning with key on - term 30 gets 12v term 86 no volts (with key on)

See if power to fuse 9, 10, 11 behind glove if not check radio, wipers if work then ignition switch - yes power to all three
If power check ASD 86 and fuel 85, one socket get power with key on - no volts to either terminal
If power go to PCM, black plug, connector A2 power with key on - getting .52 volts (battery is a little low)

any thoughts would be much appreciated.
 
#5 ·
First I assume you got a 2000 pcm for a 2.5 and not a 4.0

Next did the 2000 pcm come from a vehicle with SKIM (chipped gray head key)?

Lastly there are calif vs federal emissions PCM

If I were you I would stick with your 5 SPd 98 PCM and just add a manual switch for the lock up converter but make sure the manual switch only gets power when the brake pedal is not pushed


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#6 ·
Yes, from a 2.5 AT;

Not sure if it came from a vehicle with SKIM, is there anyway to tell? I was thinking if SKIM was activated, you could still start jeep, it will just die after a few seconds (not sure if that is true or not though)

According to the PCM part number, the PCM is from a 2.5 AT federal emissions.

I tried to swap back the 5sp auto PCM, but same issue, just cranks.

Appreciate your help.
 
#9 ·
Thanks St Somewhere, I was thinking it might be the CPS, bought a new one, no change. Put the old one back in, no change. I'll check the wiring though.

Honestly I am tempted to get the new PCM and try it, if nothing, swap back in the old wire harnesses. Digger's thought of adding the switch would be cheaper.
 
#10 ·
Digger, my dad and I had checked, no spark to plugs or distributor. I'd go back to the old PCM if it worked, maybe I start over, put the old harnesses back in and build a new harness for automatic....

Fuel pump not turning on unless I jump the relay, even then, no start. Jumped fuel pump and ASD and tried to start it.
 
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