Grand Wagoneer Cummins 4BT swap

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  • olllllo
    258 I6
    • Jul 29, 2003
    • 347

    Grand Wagoneer Cummins 4BT swap

    I thought some of you might be interested in my project. After getting a quarter million miles out of my AMC 360 (at 10-11 MPG!) I decided it was time to finally begin converting it to my dream rig with a Cummins diesel. After a sordid history of Jeep projects over the past 20 years, and a number of them that I was in WAY over my head, I opted to find the right guy for the job this time and pay someone to do it the way that it should be done, so I don't look back with regret at all the little things I wish I would have done differently.

    I tracked down an incredible guy named Aaron Reeves (www.aaronreevesgarage.com), who has a diesel swap business down in Mabank, and after a few conversations back and forth it became abundantly clear that he was the right guy for the job. I am not sure that I have ever spoken to someone how is more enthusiastic and passionate about their job. Since he has had my rig, he has treated it like it's his own, has been really amazing to deal with, and I really can't say enough about him.

    As he and I worked out the initial details of the swap beforehand, we ultimately decided to try to keep some of the stock equipment in tact, keeping the stock NP229 transfer case right where it is and building forward. The Grand Wagoneer comes with a TF727 3 speed auto. Unfortunately, getting that to bolt to the 4BT was going to be an effort that wouldn't be worth the cost. After doing a little research, I found that some Dodge trucks came with a Dodge version of the TF727 as well, and specifically a diesel version with proper shift points in some of the old D300 trucks. If we take the front half of it, it will bolt up just right to the 4BT with a Dodge adapter, and by swapping out the tailshaft with the AMC TF727 I can still bolt directly to the 229. Cool huh?

    So, I found a guy in California parting out a military D300 that had 24K on it.

    I found a donor transmission from a military rig that had 24K on it. As luck would have it, he was selling other parts to a guy that was about to drive to OKC. For a hundred bucks, the guy took it up there and I drove the 3 hours up to pick it up. On top of 250 for the transmission, I think I came out pretty good on it.

    The next step was acquiring the engine itself. I met a guy on the 4btswaps.com forum that had a few engines and I put a down payment on a complete engine, from radiator to transmission, with all accessories. This coming Monday (1/31), Aaron Reeves and I are going to drive up there to pick it up from him.

    I dropped the Jeep off at Aaron's shop last Sunday (1/23). He started by sending it directly to the car wash on Monday morning.



    Making things that looked like this:


    look like this:


    Once it was a little less miserable to work on, he created this video: YouTube - Jeep Diesels - 1986 Jeep Wagoneer Jeep Diesel Conversions. He is documenting the whole swap with pics and video, so I will have lots of goodies to share along the way.

    Next, he began the task of labeling and taking notes on all of the wiring. And then, he began disassembly:




    He sent me these pics late last night. Very exciting to see the progress!






    On Monday, Aaron and I are driving up to Tulsa to pick up my new engine, so look for pics of that soon. That's all I have for now. I believe he is pulling the engine today, so perhaps I will have more to share later.
    Last edited by olllllo; 03-17-2011, 07:14 AM.
    ~Dave Shuck

    '86 Grand Wagoneer - 4BT Cummins, Dodge NV4500, Ford NP205, Front HD HP 44, rear D60, 37" military Goodyear MTs
    >> Build Thread <<
  • TPICherokee
    Administrator
    • Jul 02, 2001
    • 3361

    #2
    AWESOME!
    www.bjsoffroad.com - BJ's Off-Road - Your Full-Size Jeeps Parts Specialist

    1987 Grand Wagoneer - 5.3 Vortec, 4L60E, NP242
    1979 Cherokee Chief - 6-inch BJ's Off-Road Lift Kit, TPI Chev 350, 700R4 with NP208 and 4.56 gears, 35x12.50R17, Rhino Front End, J-Truck Rear Axle, GoMango Orange.
    1979 Cherokee Chief​ - 5.3 Vortec, 4L60E, Quadratrac, Alpaca Brown Paint, new stock interior
    1976 J10 Longbox - 258, T18, Dana 20 - Sniper Fuel Injection
    1967 M715 - 454 Chevy, TH400, 1100R16 Michelin XZL Tires, Stock otherwise (sold)

    Comment

    • Diesel YJ
      258 I6
      • Jan 05, 2010
      • 284

      #3
      Great build and I too had the thought of using the dodge version of the 727 to keep things about the same in the jeep. Cant wait to see the progress and final product. Keep us in the loop on the build.
      2000 WJ Grocery Getter and RC approved, 4'' Lift.
      1983 Wagoneer Limted - Future tow rig
      1988 Grand Wagoneer - All stock but super sexy and clean.
      1989 6.2L Turbo diesel YJ, 6.5'' lift, 35's D44 F&R, SM465, NP205, Woody's shafts, Christmas tree air freshener.

      Comment

      • mdill
        Gone. Not Forgotten.
        • Nov 22, 2000
        • 7076

        #4
        Very cool, (I would think hard on getting a OD tranny swapped in at the same time)

        Mike D.
        -----------------------------------------
        Home of ADHD project list

        1977 J-10 Honcho 360-T15-D20
        1977 Cherokee WT 360-Th400-NP241 true-trac(s)
        1979 Cherokee 4 Door 258-T-18-D20
        1981 Cherokee Chief WT 360-727-NP208
        1972 K20 Suburban 350 SM465 205
        And the other stuff that gets driven
        ----------------------------------------

        Comment

        • olllllo
          258 I6
          • Jul 29, 2003
          • 347

          #5
          Originally posted by mdill
          Very cool, (I would think hard on getting a OD tranny swapped in at the same time)

          Mike D.
          I actually have thought about it, but as I weighed the cost/benefit, I eventually ended up where I am at as a first swag anyway. With my gearing and tires, I am going to running a little higher RPM than I would probably like, but on the other hand, not terribly unreasonable. I am going to give it a shot for a while and see where I stand. I may actually see about getting a little higher gears if it ends up being a big concern.

          Time will tell!
          ~Dave Shuck

          '86 Grand Wagoneer - 4BT Cummins, Dodge NV4500, Ford NP205, Front HD HP 44, rear D60, 37" military Goodyear MTs
          >> Build Thread <<

          Comment

          • Brizio
            AMC 4 OH! 1
            • Apr 11, 2008
            • 4850

            #6
            That's great! Also nice that he send you pics of the work!
            brizios.com
            Small Scale Jeeps
            Brizios

            Comment

            • Mikel
              • Aug 09, 2000
              • 6330

              #7
              Originally posted by olllllo
              I actually have thought about it, but as I weighed the cost/benefit, I eventually ended up where I am at as a first swag anyway. With my gearing and tires, I am going to running a little higher RPM than I would probably like, but on the other hand, not terribly unreasonable. I am going to give it a shot for a while and see where I stand. I may actually see about getting a little higher gears if it ends up being a big concern.

              Time will tell!
              What gearing/tires do you have?

              With a slow revving diesel, the more gears the merrier... I have a NV4500 and I wish I had less spacing between gears.
              1969 M715 6x6
              1963 J300 Swivel frame

              Comment

              • olllllo
                258 I6
                • Jul 29, 2003
                • 347

                #8
                I have 3.31s and 33"s, which puts me at 2314 at 65mph. If I swap in some 2.73s, that number drops to 1909! I am also considering an axle swap and a little bigger tires about a year from now, so who knows. If I decided to go SOA, running 3.31s and 37"s (which is kind of what I am thinking), my 65mpg would be about 2064. Of course that brings in the issue of strength of the 229, and God knows what else, so I'll have plenty of options to consider then. Until then I am going to run it, see what it needs and adjust from there.
                ~Dave Shuck

                '86 Grand Wagoneer - 4BT Cummins, Dodge NV4500, Ford NP205, Front HD HP 44, rear D60, 37" military Goodyear MTs
                >> Build Thread <<

                Comment

                • olllllo
                  258 I6
                  • Jul 29, 2003
                  • 347

                  #9
                  Originally posted by Brizio
                  That's great! Also nice that he send you pics of the work!
                  Very cool! It is great having a guy work on it that is as excited about it as I am. It is plainly obvious that he LOVES what he does. I told him I was going to post pics and he said that he actually has about 200 or so already! He has kept me very updated with txt messages and pics, so even though it's 1:40 away from me, I don't feel completely disconnected from the process.
                  ~Dave Shuck

                  '86 Grand Wagoneer - 4BT Cummins, Dodge NV4500, Ford NP205, Front HD HP 44, rear D60, 37" military Goodyear MTs
                  >> Build Thread <<

                  Comment

                  • GaJeep94YJ
                    232 I6
                    • May 18, 2003
                    • 88

                    #10
                    would you mind telling about how much you have in part and in labor?

                    Comment

                    • thinder
                      232 I6
                      • Sep 18, 2009
                      • 129

                      #11
                      im watchin!!!
                      86 Grand Wagoneer
                      Cummins Ve pumped 4bta
                      47RH
                      np241
                      D44 front and rear

                      Comment

                      • olllllo
                        258 I6
                        • Jul 29, 2003
                        • 347

                        #12
                        Originally posted by GaJeep94YJ
                        would you mind telling about how much you have in part and in labor?
                        I better talk to Aaron before publicizing his labor rates, but I will tell you that my gross cost is coming in just a hair under $7K as things stand right now.

                        Originally posted by thinder
                        im watchin!!!
                        ~Dave Shuck

                        '86 Grand Wagoneer - 4BT Cummins, Dodge NV4500, Ford NP205, Front HD HP 44, rear D60, 37" military Goodyear MTs
                        >> Build Thread <<

                        Comment

                        • Mavawreck
                          360 AMC
                          • Jan 02, 2003
                          • 3428

                          #13
                          This is great, would love to do this to mine as well.
                          1988 Jeep Grand Wagoneer
                          http://www.ifsja.org/forums/vb/showthread.php?t=153928

                          1996 T100 SR5

                          Comment

                          • GaJeep94YJ
                            232 I6
                            • May 18, 2003
                            • 88

                            #14
                            Originally posted by olllllo
                            I better talk to Aaron before publicizing his labor rates, but I will tell you that my gross cost is coming in just a hair under $7K as things stand right now.


                            good enough, that was what I was curious about.

                            Comment

                            • olllllo
                              258 I6
                              • Jul 29, 2003
                              • 347

                              #15
                              Aaron, his wife Emily, and I drove up to Oklahoma today to pick up the engine from a guy in Tulsa that sells a lot of 4BTs. Aaron took it home tonight, is going to take it apart to replace bearings, replace seals, pretty it up and get it ready for its new home.




                              ~Dave Shuck

                              '86 Grand Wagoneer - 4BT Cummins, Dodge NV4500, Ford NP205, Front HD HP 44, rear D60, 37" military Goodyear MTs
                              >> Build Thread <<

                              Comment

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