Turbo Diesel 2.8 CRD in a TJ/LJ solved.....
- Thread starter Metcalf
- Start date
Metcalf
Expedition Leader
The Liberty CRD has been swapped in the the XJ, but it was a 'simple' swap with a manual transmission, no cruise, limited gauge interface, etc. Still a great swap though.
http://www.prindlemfg.com/project_detail.php?projectID=2
http://www.prindlemfg.com/project_detail.php?projectID=2
brennanriddle1
Adventurer
any more info from burnsville on price/ other swaps?
Metcalf
Expedition Leader
I thought I would bump this to the top again....
I think that swapping the CRD powertrain from the liberty into the TJ/LJ wrangler is going to be the only way to get a 'factory' like conversion in a jeep universal style vehicle.
There may be a way to get the speed signal needed for the Liberty body control module by using a star-scan tool to enable the module to think it was a factory non-abs version. This would then allow a single tone wheel input to generate the speed signal needed for proper operation of stuff like the cruise control and speedometer.
This would be a way to NOT have to install the ABS computer OR the JK axles.
I think the source for the single tone ring could maybe be...
-A stock front TJ ABS unit-bearing. This would not be ideal since the computer could not sense and overspeed condition of the cruise control. It should function ok, but would not be safe in my opinion.
-Retro-fitting the rear diff with a tone ring? I don't know if anyone offers this in a TJ diff? I am sure someone like Dynatrac or Currie might be able to get something like this to work. Having to use a custom axle is a bit of a pain in the butt.
-I think the tone ring off the back of a standard 2003+ TJ transfer case might work. This is what a TJ uses for a speed signal so it might be close in pattern and speed. I think this might be able to be retro-fitted to the CRD np242 t-case also using XJ parts.....
Just a few thoughts....
I think that swapping the CRD powertrain from the liberty into the TJ/LJ wrangler is going to be the only way to get a 'factory' like conversion in a jeep universal style vehicle.
There may be a way to get the speed signal needed for the Liberty body control module by using a star-scan tool to enable the module to think it was a factory non-abs version. This would then allow a single tone wheel input to generate the speed signal needed for proper operation of stuff like the cruise control and speedometer.
This would be a way to NOT have to install the ABS computer OR the JK axles.
I think the source for the single tone ring could maybe be...
-A stock front TJ ABS unit-bearing. This would not be ideal since the computer could not sense and overspeed condition of the cruise control. It should function ok, but would not be safe in my opinion.
-Retro-fitting the rear diff with a tone ring? I don't know if anyone offers this in a TJ diff? I am sure someone like Dynatrac or Currie might be able to get something like this to work. Having to use a custom axle is a bit of a pain in the butt.
-I think the tone ring off the back of a standard 2003+ TJ transfer case might work. This is what a TJ uses for a speed signal so it might be close in pattern and speed. I think this might be able to be retro-fitted to the CRD np242 t-case also using XJ parts.....
Just a few thoughts....
Dan Grec
Expedition Leader
Has anyone made an appeal to AEV to release the info we all need to make this conversion a reality?
Honestly, I understand Dave and the crew don't want to do another because it's a major PITA, and that's cool.
They have no business case, and no interest, so why can't they make the info public so others can benefit from this great (and challenging) idea?
-Dan
Honestly, I understand Dave and the crew don't want to do another because it's a major PITA, and that's cool.
They have no business case, and no interest, so why can't they make the info public so others can benefit from this great (and challenging) idea?
-Dan
bugnout
Adventurer
there were a few D44's shipped in Liberty's to South America with tone rings. I think someone found D44 with tone rings out of a Izusu Rodeo as well. I know of one guy who got his hands on one of those.
TJKJ2002 over on www.lostjeeps.com did a SFA conversion and solved the issue without having to install a tone ring. http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=73&t=29930&hilit=tone+ring
Metcalf
Expedition Leader
AEV used one of there gateway modules to make the swap happen. It also required some custom code for the module (speed signal) The white RHD LJ also used a T1 military gauge cluster which you can't get.
Dave has been pretty forthcoming with info on the AEV board.
And yes, the swap was a major PITA from what I heard.
If I had more space I would probably tackle the swap. I would basically need a shop big enough to strip both vehicles....and leave them in parts for a few months while I built/modified the harness. It's on my bucket list.
Using the liberty gauge cluster and BCM has the potential to solve most of the issues with the swap I think.
Dave has been pretty forthcoming with info on the AEV board.
And yes, the swap was a major PITA from what I heard.
If I had more space I would probably tackle the swap. I would basically need a shop big enough to strip both vehicles....and leave them in parts for a few months while I built/modified the harness. It's on my bucket list.
Using the liberty gauge cluster and BCM has the potential to solve most of the issues with the swap I think.
Metcalf
Expedition Leader
This post deserves an icy cool beverage. I was actually researching the D44 tone rings today. I must have missed this post when I was posting my last one.
The ability to either add a D44 tone ring or use the t-case output driven sensor can solve the speed problem IF the body control module can be set to a 'non-abs' setting with a dealer style computer tool ( starscan? )
The RD116 Air locker is machined for an ABS tone ring per ARB literature.
I found the part number 4384226 for the tone ring on the KJ rear axle. This is suppose to be a 104 tooth unit ( not confirmed yet ).
Who wants a conversion kit :wings:
Weren't there LJ's made for the eqyptian military with the diesel? Shouldn't there be a computer/cluster/....misc parts that were made. Of course I think there were less than 10K made and I'm sure Jeep did not make extras.
I could have sworn I saw on some jeep forum somewhere, or maybe a magazine where someone bought one and did all the swaping.
I could have sworn I saw on some jeep forum somewhere, or maybe a magazine where someone bought one and did all the swaping.
Metcalf
Expedition Leader
Jeep made the T1 with a version of the 2.8 diesel. It longer than the LJ at a 116" wheelbase.
Mopar Skunkworks used one of these jeeps for the 'crate engine' concept a few years back at EJS.....
Article here...
http://www.4wheeloffroad.com/techar...ep_tj_wrangler_diesel_crate_engine/index.html
Sad fact is that we just can't get the diesel 'BUX' parts here in the USA. The T1 was a military issue jeep like the J8. AEV managed to get a gauge cluster for there white LJ swap, but they said you can't get them.
The easiest way to get the diesel is going to be a liberty CRD swap I fear....
Mopar Skunkworks used one of these jeeps for the 'crate engine' concept a few years back at EJS.....
Article here...
http://www.4wheeloffroad.com/techar...ep_tj_wrangler_diesel_crate_engine/index.html
Sad fact is that we just can't get the diesel 'BUX' parts here in the USA. The T1 was a military issue jeep like the J8. AEV managed to get a gauge cluster for there white LJ swap, but they said you can't get them.
The easiest way to get the diesel is going to be a liberty CRD swap I fear....
alosix
Expedition Leader
Are we working on a PCI bus setup or a CANBus setup?
On my short list of stuff to get working is getting the speed signal into a CANBus hemi ECU from the abs unit to get the 545 shifting right. I think I might still have to source an abs unit to figure out the signals though.
Likely working with an Arduino based controller for this in my project. Since I don't have a FC, ABS, or 'interior' computer I've been having to replicate some of their functionality in my M725 project.
I got the 4wd switch working not too long ago. Just need to build a 30 amp h-bridge so I can shift its NP244 HD.
Jason
Metcalf
Expedition Leader
The Liberty uses most of the bus types....
ECU is Can-c
ABS is Can-c
Front control module is the Can-c to PCI interface gateway
TCM uses an SCI interface I think
Body Control Module is PCI I think.
Dash cluster is PCI I think.
The front control module acts as a gateway module allowing most of them to talk back and forth.
ECU is Can-c
ABS is Can-c
Front control module is the Can-c to PCI interface gateway
TCM uses an SCI interface I think
Body Control Module is PCI I think.
Dash cluster is PCI I think.
The front control module acts as a gateway module allowing most of them to talk back and forth.
alosix
Expedition Leader
Ah, ok. EXACTLY what I'm dealing with in the hemi (05 durago, though the body's are can-b).
So.. I'd bet we're looking at getting the same message onto the bus. I really need to break down and get a can-c abs module to test with.