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Thread: hemtt shafts problem

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    Default hemtt shafts problem

    Hi Guys ,today on the freeway I broke shaft ujoint on rear axle. I spent couple hours trying to remove good one on the side of the road , I needed to use a torch to cut ,and remove whole shaft.
    I was thinking that I can drive just on 3 axle , but no , I needed to attach 8x8 , WHY ?
    Dose anybody now part nr for yoke , because is completely smashed up.
    thank you

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    Which yoke did you break? On which axle? Or attach some pics.

    And which model HEMTT? Or is it an MK48 style truck? The regular m977s should be able to drive with it if you busted a rear rear shaft then you have to use the axle interlock lock so you engage the forward rear tandem power divider or you could engage the front axle to pull.

    The oshkosh 55000 transfer case in a m977 985 series variants is nothing special and will let power go any direction. The MK48s I assume are that way as well since they can operate on just 2 axle with the power unit itself
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    Thank you for response
    My is M983, I was thinking that that power is always on 2 rear axles, even if I disconnected last one [4] I still can drive using just 3 one without turning on 8x8

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    Quote Originally Posted by toudi View Post
    Thank you for response
    My is M983, I was thinking that that power is always on 2 rear axles, even if I disconnected last one [4] I still can drive using just 3 one without turning on 8x8
    No. Only the rear rear axle is powered without the interlock engaged.
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    83' M923A1
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

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    The drive configuration is a bit odd on HEMTTs. Standard is only the #4 axle powered. With Interlock you should power both #3 and #4 but it also interlocks the #1 and #2 axles even though the transfer case is not supplying power. In 8X8 you are actually only 4X4 as interlocks are not engaged so only axle #1 and #4 are powered. In Low range you will also only power #1 and #4 unless you also select Interlock which then will give you true 8X8 powering all 4 axles. I have plans to put another selector in so I can engage the transfer case in High and also select interlock so I can get true 8X8 in High range not just low. Hope this helps you.
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    thank you
    one problem explained,
    I been trying to find parts , shaft and axle yoke but no luck , what I funded it's whole rear axle , any idea for parts nr ?
    shaft probably I can order to build in shafts shops , but axle output ?

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    Which yoke did you break? For which axle? The driveshaft and yoke are common parts. I just need to know which shaft on which axle you broke to tell you what parts numbers and what parts you need They are different among each axle for yoke lengths and shaft splines.. Can you take some pictures of everything. The u joints are all 5-280Xs on the truck other things can have differences though. Pictures are worth alot more than words thanks
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    83' M923A1
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

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    how to post pictures from cellphone ?
    can I drive around 10 mils to my place with central locked ?

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    I broke last ujoint on rear last axle [4], I need shaft between two rear axles [3-4], and rear axle [4] yoke , Im thinking that is English name for this part, I'm from Poland
    thank you

  10. #10
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    Yes you can drive with it locked.
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    83' M923A1
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

    https://www.youtube.com/channel/UCTd...D4dOJidPFnmYGA

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