In the beginning stages of planning an engine swap on a 2004 Disco II. Still educating myself and trying to go into this with a battle plan that is well though out and somewhat coherent. The things as of right now that are non negotiable are the cummins r2.8. My father is retiring from cummins next year and not only is the slight discount worth it but more or less an ode to him and his career so LS swap suggestions that seem to flood every thread of an engine swap are out of the picture. Saw another post someone had done something similar but after reaching out was radio silence. As the build starts and gets going I am going to try and document everything to the best of my ability with pictures and maybe some videos on things that give me a hard time to hopefully ease the path for anyone looking to do the same. That being said would like to keep the Auto transmission, well scratch that, My wife would like me to keep the auto transmission. This is a fun car, not a daily driver so there is no timeline or rush. Now to the holdup after reading through the Disco repair manual trying to get an idea of BCU interface and how that will be affected post swap. The R2.8 Comes with its own ECM and there are multiple interface crossovers from old Disco ECM to BCU. To anyone whos done a swap what was lost as a result of this? As of right now considering keeping the ZF 4HP auto seems to be the easiest path forward however another post used the GM 4L80 which zero gravity seems to have a lot of support for. Mechanically all of this stuff is straight forward electrically i am very out of comfort zone. Anyhow any info is great and when i start I will be sure to make a new thread and try to post problem solution items that i've found.

 

I believe the TCU uses MAF airflow for shift points and firmness, you will probably do better with a TD5 TCU as it likely uses different inputs for shift points. You could consider third party stand along TCU but I have no experience with those. Good luck and let us know what you figure out.

 

There is a guy on youtube @Tinker1837 that did a very detailed video series on his 4BT swap and he went with a manual transmission and custom gauge cluster.

 

if memory serves correctly he put a 4bt which is a totally different animal into a d2

 

Read through the LS swap thread, lots of good info there on what the rover needs to keep the transmission happy. At a bare minimum, you need to feed the rover ecu the original crank position sensor signal, throttle position signal, and VSS. MAF is less important, lot of LS guys aren’t running it. When you pull the rover engine, keep the reluctor wheel and figure out some way to mount it (or a version of it) to your crankshaft. Position/timing of it doesn’t matter, you just need it to generate the correct frequency to keep everything happy. As far as the other two signals, you’re gonna have to figure out some way to decode them and feed them into the ecu. Not sure how the shift points will relate to the Cummins power band, not sure if you will have to rev the nuts off it to get it to shift. If you go with a different transmission, you will have more luck programming it and running it standalone. Would still plan on feeding the other signals to the ecu to keep the dashboard and gauges happy.

 

I don't think there have been many successful re-engines to the cummings engine. It is discussed at lot but I have never seen a discussion run to completion. The TD5 runs an auto box the older HP22 I believe for most of them.
I wish you luck but with modern vehicles engine swaps are not simple too much electronics.

 

Delta,
I'm not sure if you have reached out to this guy, but he has already done this swap. https://landroverforums.com/forum/en...-diesel-99249/
As far as necessary items to complete the swap, a lot of that simply depends. Someone else suggested an older version of the 4hp22 that is hydraulically controlled instead of electronically controlled. That would alleviate a lot of headaches if you are set on retention on the LR trans. If you want to keep the version you have, you could use a compushift for control of the trans. BCU, you really shouldn't need much. Even if you just got rid of the LR engine, you lose tach, and coolant temp on the dash. The vehicle would still drive. I do believe traction control would not work. I'm not 100% certain, but I believe traction control requires throttle position and possibly engine speed. You can simulate throttle position. My suggestion is to retain the LR ECU and use this as a signal pass through. You will want to remove the check engine light signal from the LR ECU and tie it into the Cummins side. Beyond that, I don't think there is much else that would be necessary. Tach signal to the Rover ECU is 58x. If the Cummins is 58 tooth great, if not, you will need to convert it. The Rover coolant temp sensor can be plumbed into the cooling system somewhere to retain gauge function. This will be an awesome swap! I look forward to seeing it. Let me know if you have questions.