3 speed auto to 5 Speed Stick Trans Swap - JeepForum.com
 
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post #1 of 11 Old 09-22-2010, 12:41 PM Thread Starter
GPERSCREEPERS99
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3 speed auto to 5 Speed Stick Trans Swap

I am thinking about doing this...Has anyone done it? Any write ups? I tried to search but I am not having luck looking for what I want.

I did this in My Mustang a year ago and it was no big deal but I would like to know what I am getting myself into before I start trans shopping.


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post #2 of 11 Old 09-22-2010, 12:44 PM
turtlerace
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Drive it down here and we will swap parts for parts in my garage!
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post #3 of 11 Old 09-22-2010, 12:50 PM
Jerry Bransford
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Why? Most offroaders want to go the other direction, from the 5-speed to the 3-speed automatic. That is what I converted my 5-speed to and the offroad results were worth the time and effort.

When you have a choice, buy American made.
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post #4 of 11 Old 09-22-2010, 12:55 PM
snowrydr01
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your ECU will work but your going to get CEL when the computer tries to activate the TC lockup. No way around this besides reflashing what you have or getting a new ECU and reflashing your vin into it. Im running into the same thing planning for a 32rh to aw4 conversion
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post #5 of 11 Old 09-22-2010, 01:05 PM
Jerry Bransford
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No need to reflash the VIN into the ECM. I swapped the ECM to an automatic style when I did my transmission conversion and all I made sure was that it came out of a '97 with the 4.0L and automatic and it worked fine.

When you have a choice, buy American made.
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post #6 of 11 Old 09-22-2010, 01:06 PM
MisfitSeven
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i did this swap in June. it was pretty straight forward.

Mail crawling.
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post #7 of 11 Old 09-22-2010, 02:10 PM
snowrydr01
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Quote:
Originally Posted by Jerry Bransford View Post
No need to reflash the VIN into the ECM. I swapped the ECM to an automatic style when I did my transmission conversion and all I made sure was that it came out of a '97 with the 4.0L and automatic and it worked fine.
How does inspection work in your state? Ours (PA) does OBDII and any "inconsistency" is an automatic fail. I was under the impression that the vin would show up when they plug in.
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post #8 of 11 Old 09-22-2010, 02:43 PM
Jerry Bransford
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Quote:
Originally Posted by snowrydr01 View Post
How does inspection work in your state? Ours (PA) does OBDII and any "inconsistency" is an automatic fail. I was under the impression that the vin would show up when they plug in.
My TJ passed California's smog test without a problem after installing the new ECM. From what I can tell, Calif's smog test is the strictest in the U.S.

When you have a choice, buy American made.
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post #9 of 11 Old 09-23-2010, 06:58 AM
snowrydr01
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Quote:
Originally Posted by Jerry Bransford View Post
My TJ passed California's smog test without a problem after installing the new ECM. From what I can tell, Calif's smog test is the strictest in the U.S.
Thats how NJ was (coppied the Cali one) but in Pa they take an easier route of just plugging in the OBDII slot and failing you if anythings amis. I use to get 02 sensor codes and cleared it before i went. Luckilly the guy was cool enough to tell me to come back the next week because the clear was too recent and would be a fail.
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post #10 of 11 Old 09-08-2011, 12:29 PM
kevlarmenace
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I know this is a little out of date, but I am planning this as well (the third A/T is on it's last legs, and I don't want to put another one in) and I wanted to know about how much time it took you, or what parts cost. I hate the three speed.
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post #11 of 11 Old 09-08-2011, 03:01 PM
lukepeterson21
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Yeah I am also interested in doing this! Would love to know about your process and all the required parts for all of this?
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