Advance Adapters and Cummins 2.8L Diesel Engine Conversion for Jeep®

At the 2016 SEMA Show, Steve Roberts from Advance Adapters and Stephen “Steve” Sanders of Cummins Repower program share in-depth details on the Cummins 2.8L diesel crate engine conversion. Tailored for Jeep®, Land Cruisers, Land Rovers, light trucks and other swaps, the high-tech R2.8L CRD is a potent, fuel efficient, self-contained “crate” solution for maximum torque output and reliability.

Entering the market in 50-State legal, E.O. certified form, the engine is a swap-ready package with Advance Adapters targeting a variety of chassis and transmission applications at initial launch.

aa-cummins-sema-1 aa-cummins-sema-3

Cummins is a globally respected builder of industrial, commercial (medium-duty and heavy-duty trucks) plus light-duty diesel engines.  The Cummins Repower program now enables Jeep® owners and other 4×4 enthusiasts to join the Cummins family! The venerable ‘ISB’ engines, like the 5.9L 24-valve CRD in the magazine’s ’05 Ram 3500 4×4, are a testimony to the rugged reliability and efficiency of Cummins engines. The newer generation 5.0L V-8 and R2.8L four have take Nissan trucks to the next level. Cummins R2.8L power, found in the Nissan Frontier, will now be available to Jeep®, Land Cruiser, Land Rover and other 4×4 enthusiasts!

aa-cummins-sema-6 aa-cummins-sema-4

The R2.8L four-cylinder inline common rail diesel (electronic injector CRD) is now offered as a “crate engine” for ease of installation.   The package includes important details like the ECM, a wiring harness and other “turn-key” features. Run-ready Repower engines are a Cummins specialty, the company sells complete, “crate” powerplants across the globe.

aa-cummins-sema-8 aa-cummins-sema-5

Turbocharging is integral to the engine. The package comes complete with the starter assembly, alternator and provision for engine driven accessories.  Advance Adapters precision transmission adapters and motor mount kits complement the known Cummins reliability and contemporary”clean” technology.   

aa-cummins-sema-14 aa-cummins-sema-13

Chassis, brakes and A/C often require vacuum, whether a brake booster, A/C controls or a Jeep YJ Wrangler front axle disconnect.  Unlike gasoline engines, a diesel engine does not produce manifold vacuum.  At right, the Cummins R2.8L engine’s vacuum pump is camshaft driven, providing the necessary vacuum for chassis/body devices.

aa-cummins-sema-15 aa-cummins-sema-16

The engine comes with a finned cooler and fittings for remotely mounting the oil filter.  4x4s with a driver’s side drop front driveline could place a risk on an engine-mounted oil filter. (Older Jeep® inline sixes have a history of puncturing oil filter canisters along rugged trails.)  Cummins provides fittings for the remote oil filter.

aa-cummins-sema-11 aa-cummins-sema-12

Though “busy”, everything fits neatly in the Jeep® TJ Wrangler installation at left.  On this installation, the remote oil filter mounts near the brake master cylinder/booster assembly.  At right, the front of the crate engine provides easier adaptation of engine driven accessories.  Cummins crates this R2.8L Repower engine with a new alternator, common 8-rib belt pulleys, the belt tensioner and a universal bracket for the A/C compressor.  A new power steering pump (not shown here) is also included in the package.

aa-cummins-sema-2 aa-cummins-sema-7

Fully operational and featuring the vehicle’s original functionality, the R2.8L nestles neatly in this Jeep® TJ Wrangler engine bay. The stock 4.0L radiator is able to handle the rated 161 horsepower and 267 ft-lbs of torque, claiming an operating temperature of 177-180 degrees F. The precision machining on the Advance Adapters engine-to-transmission adapter assures a proper fit. Currently, the transmission adapter lineup fits the Ax15/NV3550 and G.M. automatics. Discussion is underway around fitting the Aisin AW4/A340 transmissions common to both Jeep® XJ Cherokee and Toyota truck applications.

aa-cummins-sema-9 aa-cummins-sema-10

The initial launch from Advance Adapters will include several Jeep® engine mount kits and transmission adapters that include the Jeep® AX15/NV3550 and G.M. automatics.  The pilot sales will be 50-State legal, California (C.A.R.B.) E.O. certified crate engines for models through 1999, including the Jeep® CJ, YJ and TJ Wrangler plus the XJ Cherokee.  

The certification for first quarter 2017 launch of the R2.8L Cummins diesel will qualify this run-ready crate engine at the Tier 1 emissions standard. (By design, this engine is fully capable of meeting later, higher tier requirements.)  The magazine’s 1999 Jeep® XJ Cherokee will serve as a prototype ‘how-to’ installation of the Cummins R2.8L diesel. The step-by-step process will be covered in HD video for the magazine’s viewers.  Stay tuned!

More model applications for the Cummins R2.8L crate engine are under consideration, including the Jeep® JK Wrangler.  The JK Wrangler is a prime candidate for the Cummins Repower R2.8L crate engine.  Stay informed on the latest developments from Advance Adapters and Cummins.  Visit the websites at: and

See the Early 2017 Update from Steve Sanders at Cummins Repower:  Click here!



  1. Kevin Bindshedler says:

    How much is this engine for the jeep JK?

    Will my six speed Jeep manual gearbox mount up to your diesel?

    If you cannot tell me the price of the engine for the JK then what is your projected price for the TJ?

    When is the JK model coming out?

    What is the number I can reach you at?

    • Moses Ludel says:

      Kevin…As of the video interview at 2016 SEMA Show, neither Cummins Repower nor Advance Adapters had hard figures on the cost for the complete crate engine or the adapters. The intent is to make this crate engine package 50-State emissions legal. After that point (early 2017), the complete package will be sold through Advance Adapters. Advance Adapters is your source for pricing and other details. Contact: Advance Adapters website.

      Also contact Advance Adapters for details on the models covered by this swap. Initially, the adapters will be for the 5-speed AX15 and NV3550: Jeep YJ and TJ Wrangler applications and rare XJ Cherokees equipped with these manual transmissions. AA and Cummins will be working on an adapter to the AW4, the automatic transmission in our 1999 XJ Cherokee.

      Initially, the Tier 1 emissions certification would only reach to 1999/2000 model year vehicles. Undoubtedly, the long term goal is to certify this crate engine to higher Tier levels, which would reach into the Jeep JK Wrangler models (at least the 2007-2011 models, perhaps even later JKs). This is all dependent upon California E.O. emissions certification and the ability to package and sell this crate engine for later applications than Tier 1.

      You and others can reach me for further questions on this engine and my R2.8L Cummins diesel swap into the XJ Cherokee at the magazine’s forums: 4WD Mechanix ‘Tech and Travel’ Forums. Please join the forums (free) and post at the Jeep section, I’ll watch for your topic questions and gladly reply there.


      Moses Ludel

  2. Tim Clark says:

    Will the 2.8 fit in a 1988 or 89 bronco ll 4×4

    • Moses Ludel says:

      Tim, the quick answer would be, “Yes.” However, there are several details and adaptation needs involved. I would very much like to expand on your question at the magazine’s forums: 4WD Mechanix ‘Tech and Travel’ Forums. If you would like to post your question/topic at the Ford Bronco section, I’ll watch for the topic and elaborate there. Thanks…

  3. andy loechler says:

    3rd gen Toyota 4 runners?

    people are spending $22K-$28K right now doing this type of swap with KZ and KD motors.

    I would not think the market is huge but I would be first in line.

    • Moses Ludel says:

      Agreed, Andy…I’d like to continue the discussion at the Toyota forum (, as there are many reasons for making the 4-Runner a Cummins swap. Not the least, Advance Adapters is very familiar with the Toyota 4x4s. There’s now a precedent with Nissan’s Titan and a Japanese “import” truck turning to Cummins for power. A natural with these high-tech diesels!

  4. Marc 52 says:

    I would love to put this motor in my 2002 Isuzu Trooper. Is there or will there be info on what vehicles this motor will be compatible with? Been searching for more info on this dream motor all over the web with little luck. Thanks for all the info you provide!

  5. Moses Ludel says:

    Hi, Marc…Great idea there…The engine would fit your Isuzu Trooper chassis well, you’d need to make frame adapters. An issue would be transmission type and that adapter.

    Currently, the R2.8L Cummins adapter from Advance Adapters is for the popular AX15 transmission (similar to Toyota A150). This could provide a route for the early round of transplants if the AX15 transmission would mate to your transfer case, that’s worth exploring…I’m working with Advance Adapters around the Aisin AW4 automatic transmission application, which would include the popular 4.0L XJ Cherokee and other Jeep applications.

    Let’s keep this dialogue going, join us at the forums: I’ll add an Isuzu section for your use there, you have a great vehicle for the Cummins diesel engine!—Moses

  6. Harry says:

    Retro into a Land Rover defender ?

    • Moses Ludel says:

      Harry…Why not? There have been Land Rover models with European diesel engines. This Cummins engine is high tech and has been used in a F-350 at Brazil. Would seem a natural. Stay in touch with Advance Adapters about transmission options, currently you would need an AX15 Aisin and the AA adapter package. Adapting the AX15 to your transfer case could be discussed with AA, there’s also the rugged Atlas transfer case from Advance Adapters if the drop side is correct. If demand exists, perhaps there would be a Land Rover specific kit at some point. Join us at the forums, we can explore this further: I set up a Land Rover/Defender section some time ago. Your involvement would be welcome—and jump-start the topics!

  7. G13Man says:

    I would love 4 cylinder diesel 0n my
    86 , Dully , 1 ton Toyota
    costs ? total ? [ about ? ]
    i read some where it came with an 8ight speed automatic ?

    • Moses Ludel says:

      The current Advance Adapters kit targets the Jeep AX15 transmission. This is Aisin and similar to the Toyota A150. You may have a way to go with an A150 adaptation to your ’86 Toyota. No 8-speed automatic adapter at present, watch the Advance Adapters site ( for updates on applications, availability and pricing. 4WD Mechanix Magazine will be involved with an XJ Cherokee swap later this year, the AW4 automatic in the XJ has been used by a variety of Japanese vehicles and Jeep/Dodge Dakota. This would be a possible route for your ’86 Toyota application as well. Toyota has used the Aisin-Warner AW4 in a number of applications.

  8. Tyler says:

    Will it fit in a 1993 Isuzu Amigo 2wd manual, possibly mated to the NV3550 trans? Thanks

    • Moses Ludel says:

      Current adapter from Advance Adapters is to the AX15 Aisin 5-speed, a similar bolt-up to the Jeep NV3550. With an Amigo, it would seem wisest to explore the AX15 fit, and Advance Adapters is a direct distributor for Aisin AX15 brand new units. We will be covering developments on the R2.8L Cummins crate engine swap at the magazine and forums ( Join us at the forums, we’ll be able to share your interest with AA and Cummins Repower.

  9. Trevor says:

    Would this engine fit inside my 1994 dodge dakota? Will it also work with the original automatic transmission?

    • Moses Ludel says:

      There is a way to do this with a Dakota: Many Dodge Dakotas use the AX15 manual transmission. The current adapter is actually for an AX15 (Jeep version, would also work with the Dakota AX15). If anyone has a Dakota with the AX15, this could work. As for the automatic transmission, I’m in line for the adapter to the AW4 Aisin unit used in the XJ Cherokee. Beyond that, it’s unclear whether other automatic transmission adapters will be available from Advance Adapters in the near future…You would still need to mate the R2.8L Cummins engine to the chassis, adapter motor mounts and such would need to be fabricated. Jeep mounts might be modified, or Advance Adapters also has universal mounts in the works. Will it fit? There’s plenty of room under the Dakota hood for this engine. Weight would be similar to the Dakota V-6, less than the V-8 pushrod engines.


  10. Philip says:

    I’ve craved a diesel powered D21 Nissan for years. Being Tier 1 certified would be plenty enough for my dream, just finding and mating the transmissions supplied in this truck are the question. Any idea if there will be adaptors for the Nissan trannys?

    • Moses Ludel says:

      At present, the Jeep YJ/TJ Wrangler version of the Aisin AX15 transmission is the target for the first launch of the R2.8L diesel package. You could use the R2.8L with a Jeep bellhousing and AX15. If the Jeep type AX15 won’t mate to the Nissan transfer case, you could consider a Jeep or Toyota (A150 transmission models) transfer case as long as the “drop” is to the correct side of the vehicle for the front driveline and differential. An Atlas transfer case would be another option, set up with the correct drop side. Parts will be available through Advance Adapters once the 50-State (California) emissions certification is in place for the R2.8L Cummins diesel. The motor mounts, cooling system, exhaust and all electrical interface components would be additional considerations. Anything is possible, the only limitation is cost!

  11. Matt Bourque says:

    I am so amped up for this conversion. I am hoping to be the first Scrambler with this kit to be installed in the country. I already have an AX-15 in the Jeep so drive-line wise I should be ready to go. I just saw the updated email last week and they do not have pricing yet but the anticipation is killing me. I hope all said and done it will be under $10,000.

  12. Steve Earnshaw says:

    Hi, I have a 2008 Dodge Dakota with a 3.7 ltr V6…It stinks on the gas mileage.

    It is an automatic (STOCK) 3 to 4 speed 4X4.

    Can you install the 2.8 Cummins in this truck and have everything else work and what would be the cost..


    • Moses Ludel says:

      Steve, the current adapters are for the AX15 in Jeep and related vehicles. The earlier Dakota V-6 models did use the AX15 manual transmission, but you have an automatic. Your swap is something to discuss with the tech staff at Advance Adapters, they may have your transmission on the radar screen and certainly would be interested in your potential swap. The R2.8L diesel engine would certainly fit well although you would need adapters. In the first round of emissions approval, however, Cummins will apply for Tier 1, which is essentially through model years 1999/2000. I’m sure 2008 models will be considered shortly, as the Jeep JK Wrangler is a prime candidate for this engine, especially 2007-2011 model years. You can keep informed of developments at the magazine or our forums, where we have an active Dodge Dakota following at the Dodge truck section. Join us at:…Moses Ludel

  13. Brad says:

    Great write-up and information. This engine is definitely on my radar as a swap into my GMC Sonoma if you end up sorting compatibility with the GM 4L60E auto transmission. Thanks for all the responses and the information!

    • Moses Ludel says:

      Brad, in my discussions with Advance Adapters, the 700R4 and 4L60E have been strong considerations. This would be a natural for the Sonoma when an adapter package becomes available. Advance Adapters would like your input, I’m sure!

  14. ken christesen says:

    I would love to replace my 258 six with this product, will it be available for a 1981 cj5 ?

    • Moses Ludel says:

      A natural…Currently, an adapter is available to mate the AX15 for Wrangler and XJ Cherokees. A mate-up to earlier CJ transmissions would be likely. Advance Adapters sees this as a good fit for the CJs, and the emissions certification target date is this summer. Let’s watch for that California CARB approval and a crate engine that is 50-State emissions legal. Follow us at the magazine’s forums and share your interest in the Cummins R2.8L diesel conversion!

  15. Andy Lotz says:

    I’ve have a 72 bronco with 3 dead holes just crying for this 2.8. Where is it already? I could see this engine being very popular with the early bronco crowd. There isn’t a lot of engine options for us. Not many are willing to swap in a gm ls. Coyote is really expensive and difficult to swap. 302 and 351w’s are getting long in the tooth. Who’s going to build the small block ford adaptor?

    • Moses Ludel says:

      Andy, in initial discussions with Advance Adapters and Cummins, the early Bronco was a definite target. This is a crate engine conversion, so mounts and other details are often shifted to the installer. Advance Adapters does sell the AX15 for early Bronco retrofit already. A/A’s universal motor mounts can be helpful, too…This five-speed transmission could make your swap even more practical with its overdrive. Contact Advance Adapters and share your interest. Keep us posted on your progress at the Bronco section of the magazine’s forums ( We’d like feedback on this swap if you pursue it!…Moses

  16. Tray says:

    Would love to see an adaptor for the Land Rover Disco 2, seeing as having the worst engine on the planet, and very few swap options out there. I was excited to see this coming to market, I’m in the need of an engine refresh, but may wait until this is available.

    • Moses Ludel says:

      There is one Land Rover Discovery installation already racking up miles, Tray. This would be a good engine for your replacement! Let’s see what the emissions tests yield. The list of prospective vehicles is growing, and if 50-State legal emissions status develops, watch the R2.8L Cummins diesel’s popularity soar…Moses

  17. Tyler says:

    Moses.. Would there be any problem with a 1994 FJ 80 LC?

    • Moses Ludel says:

      Adapter to the transmission and the motor mounts would need to be worked out, plenty of room in your engine bay! Advance Adapters could comment on the mate-up. The four-cylinder R2.8L engine has been used in an F350 Ford pickup at Brazil, so apparently heavier GVW vehicles are candidates. The FJ80 is heavy, however. Frankly, I would prefer a Cummins BT6 or ISB engine for a heavier vehicle, this is the engine used in Ram trucks. (Lots of engine weight, though your FJ80 has a stout beam front axle for supporting a six-cylinder diesel; the spring rate would need to change.) You might be satisfied with the R2.8L, though in my view this is a light-duty vehicle engine (not a reflection on the engine’s integrity, simply the fact that there’s no substitute for horsepower and torque, which is dictated by engine displacement). There are AEV JK Wranglers with 2.8L VM conversions, presumably the owners wanted that level of power; the Cummins R2.8L is superior to the VM in my view. Again, I’m not a fan of 2.8L engines (including turbo-diesels) in vehicles with unloaded curb weights over 5,000 pounds.

Leave a Comment


— required *

— required *