Tj 4.0 swap question

mossyoaktj · 09-16-2015, 09:23 PM

I have the chance to get a 2001 tj that was initially a 2.5l. It has been swapped to a 4.0l using entire drive line harness and what not. However the gauges nor the heat works. I have read that it's because the pcm will not interact with the cluster or something along those lines. Is there an easy fix to this , like swapping in a 97-00 cluster.Any info will be helpful

blazerbrad · 09-17-2015, 07:06 AM

What year are the donor parts from?

mossyoaktj · 09-17-2015, 10:36 AM

98

mossyoaktj · 09-18-2015, 07:03 AM

Been trying to research the issue a bit. And from what I have found is the dash harness/body harness needs swapped over to a 97-00 harness along with The cluster. Can anybody confirm this.

blazerbrad · 09-23-2015, 08:17 AM

I don't have access to all of the technical manuals anymore (I did vehicle testing for Chrysler back in the late-90s to early-2000's) but that is around the time period they switch the ECM's over to CAN interface. It would make sense that the dash of an 2001 model year would not communicate with the older style ECM. Not sure how easy the swap will be as I don't know if the dash modules are simply plug and play between them or if the harness is completely different also.

To be honest I would be hesitant to buy a vehicle where the person who did the swap didn't bother to make the dash or heat work........makes you wonder what else may not be right.

T-bird · 10-02-2015, 09:21 AM

I think I know the Jeep you are looking at. I went back and forth with him for a while and decided for the price he was asking it was defiantly not worth it.

09-16-2015, 09:23 PM	#1
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	Tj 4.0 swap question I have the chance to get a 2001 tj that was initially a 2.5l. It has been swapped to a 4.0l using entire drive line harness and what not. However the gauges nor the heat works. I have read that it's because the pcm will not interact with the cluster or something along those lines. Is there an easy fix to this , like swapping in a 97-00 cluster.Any info will be helpful __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

09-17-2015, 10:36 AM	#3
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	98 __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

09-18-2015, 07:03 AM	#4
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	Been trying to research the issue a bit. And from what I have found is the dash harness/body harness needs swapped over to a 97-00 harness along with The cluster. Can anybody confirm this. __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

09-17-2015, 07:06 AM	#2
blazerbrad - CORE Member - Join Date: Feb 2007 Posts: 831 Images: 6	What year are the donor parts from?

09-23-2015, 08:17 AM	#5
blazerbrad - CORE Member - Join Date: Feb 2007 Posts: 831 Images: 6	I don't have access to all of the technical manuals anymore (I did vehicle testing for Chrysler back in the late-90s to early-2000's) but that is around the time period they switch the ECM's over to CAN interface. It would make sense that the dash of an 2001 model year would not communicate with the older style ECM. Not sure how easy the swap will be as I don't know if the dash modules are simply plug and play between them or if the harness is completely different also. To be honest I would be hesitant to buy a vehicle where the person who did the swap didn't bother to make the dash or heat work........makes you wonder what else may not be right.

10-02-2015, 09:21 AM	#6
T-bird Join Date: Sep 2010 Location: Centerville Posts: 123	I think I know the Jeep you are looking at. I went back and forth with him for a while and decided for the price he was asking it was defiantly not worth it.