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Thread: M1031 to M1028A1 Overland Build, Offroad Designs NP203/205, 4L80E Conversion

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    Colonel Glockfan's Avatar
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    Default M1031 to M1028A1 Overland Build, Offroad Designs NP203/205, 4L80E Conversion

    Folks, it has been a good long while since I have interacted with you and I promise that I will post more pics as I get the time... My truck is back on the road after being out of commission for three months. We still have a few bugs (leaks) to address but I figured that I would post some pictures. Since moving from Georgia to Utah, I have embraced the "overland" concept. My son and I are going to hit the White Rim Trail in Canyonlands National Park in about 17 days (June 1-6, 2019). Let me attempt to outline what I have done to the truck since moving to Utah. The truck has been a work in progress and all of the frustrations are starting to pay off!

    When I first moved here, priority number one was getting the steering working right. I installed ORD crossover steering with a 1.5" x .375 DOM tie rod and heavy duty ends. I installed all new PSC parts (pump, reservoir, steering box, hydraulic assist ram) and got rid of the king pin springs and Delrin bushings. I opted for the neoprene "cylinders" and Reid Racing bronze bushings.

    Next, I decided to upgrade the anemic 1.97:1 low range NP205 by adding an ORD doubler. The NP203 range box added to the NP205 gives me closer to 4:1 low range and top speed in "low-low" is about 8 MPH. While doing the doubler, I decided to go ahead and get rid of the TH400 and I opted for the 4L80E. To save you a lot of hassle, there are three things that you need to buy that will make your 4L80E conversion simple. These are: The factory Delco Throttle Position Sensor (TPS) from a 1991 diesel truck. You remove your old vacuum TPS and install the new sensor and you are good to go. You need to buy a Winter's gated 4L80 cable shifter. It simply works. Stephen Watson at Offroad Designs recommended it and he was right. Money well spent. One of the most critical decisions that I made was deciding which transmission controller to use. Another member of this site suggested US Shift (Baumann Electronic Controls) and that is the company that I chose to go with and I am so glad that I did. Kevin at US Shift is simply awesome!

    While the truck was "down", I had my fabricator build me an over the bed rack for my Tepui Rooftop Tent. I have the Autana 3 and it fits perfectly on my custom rack. I added a Tepui 6' awning. In true overland spirit, I bought an ARB Elements refrigerator and permanently mounted it in the bed. The fridge is designed to live 365 days a year in the elements and requires no special treatment to make it weatherproof. It was expensive but I think that it will be worth it for those desert outings. Cold drinks always available will be an overland luxury.

    I have already purchased and plan to install a York engine driven air compressor. I have a brand new ARB RD166 sitting in the box for the front D60. I am not sure if I will have time to get the compressor and air locker installed before the trip but that is my goal.

    Now, on to the pics (thank @sharecropper for convincing me to post)...

    Tepui_Autana3_1.jpgslider.jpgtailgate.jpgTepui_Autana3_2.jpgTepui_Autana3_3.jpgTepui_Awning.jpg

  2. The Following 5 Users Say Thank You to Glockfan For This Useful Post:

    CARMAN (05-14-2019), cruzer747 (05-14-2019), ridenby (05-14-2019), Sharecropper (05-14-2019), Trailboss (05-16-2019)

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    General CARMAN's Avatar
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    Nice build! Dreaming of coming out your way one day. Really tired of the East Coast and crazy people. Just a long drive in this Beast.
    thumbnail (2).jpg
    M923A2
    S-280
    M1101

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    4 Star General Sharecropper's Avatar
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    Outstanding Joe. Probably the best overlander I’ve ever seen.

  5. The Following User Says Thank You to Sharecropper For This Useful Post:

    Glockfan (05-14-2019)

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    Colonel Glockfan's Avatar
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    Quote Originally Posted by Sharecropper View Post
    Outstanding Joe. Probably the best overlander I’ve ever seen.
    Thanks Mike! More pics will be coming very soon!

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    Corporal cruzer747's Avatar
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    Nice truck!! So as I am looking into the horizon on my own build (M1010) changing the transmission is a must. I have read a lot of people doing the 4l80e and getting frustrated that it made me lean towards having a bulletproof 700r4 built. The 700r4 has a little better spread on the gearing but I like knowing that if I were to go the 4l80e route that it is designed for this weight and if it were to fail I could get any 4l80e at this point and swap it in rather than need to have another one custom built. Aside from what you have shared are there any other threads that you would recommend for walkthroughs and parts lists? Thanks! I could do my own research again but would hate to go the wrong direction. The weight of the M1010 alone makes me want to use the heavier tranny.

    -edit- I just found and will read the thread and will go back to doing homework"
    "The mythical CUCV 4L80E swap "

    Last edited by cruzer747; 05-14-2019 at 16:20.

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    Sergeant Matt S's Avatar
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    Great work and thanks for the tips!
    1986 M1031

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    4 Star General Keith_J's Avatar
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    I am doing a 4L80 conversion of sorts. TCI 6x. Planning on same TPS and using Dakota Digital for ESS. Moving engine forward to keep TC fixed . My 1031 has functional and needed PTO generator and air compressor.
    The 6X has a 2.98 first gear and splits 1 and 2 with the OD planetary to add two more speeds. So you have 4 speeds selectable plus two more automatic.
    1986 M1031 SECM.
    1985 MEP 002A
    1974 MEP 026C, eventually converting to electric start.

  10. #8
    Colonel
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    I like it a lot! Thanks for all the specific info on your build!
    1986 M1031 with Pro Fab bale bed
    1986 M1031 Contact Maintenance with gen. & air
    1986 M1031 Contact Maintenance empty box truck
    1986 M1009
    1986 M1009
    1983 M915A1 rebuilt in 2010, NICE

    If all else fails follow directions!

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    Corporal 83k30's Avatar
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    Great looking rig!

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    Moderator Tinstar's Avatar
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    That simply looks like fun!
    Last edited by Tinstar; 05-19-2019 at 00:59.
    1987 M1008A1 (2)
    1986 M1009
    1995 NF2D FloodLight/Kohler-Kubota Generator Set
    1992 M101A2 trailer (2)
    S-280 Shelter

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