Stock Humvee rims on a front 10 bolt?

Discussion in 'Differential & Driveline' started by Pender1, Aug 9, 2018.

  1. Pender1

    Pender1 Full Access Member

    Posts:
    281
    Likes Received:
    9
    Joined:
    Nov 12, 2014
    Location:
    SC
    First Name:
    Brian
    Truck Year:
    1986|2014
    Truck Model:
    K5|1500
    Engine Size:
    350|5.3L
    Trying to work out my 8 lug rear/6 lug front issue. If I put 2" thick 6 lug -> 8 lug adapters on my front 10 bolt can I run stock Humvee take offs? I'm pretty sure I can run them as-is on my rear 14 bolt, but the front is the big question. I'm not afraid of trimming sheet metal as needed, but I don't know how much clearance I have on steering components and such. Anyone have experience to share?
     
  2. colonel mustard

    colonel mustard Full Access Member

    Posts:
    87
    Likes Received:
    40
    Joined:
    Apr 4, 2018
    Location:
    louisville ky
    First Name:
    steven
    Truck Year:
    1981
    Truck Model:
    k5 blazer
    Engine Size:
    350
    find a 10 bolt 8 lug front. swap everything from the hub out. much cheaper than the route your trying to do. plus from my understanding the hummer rims need to be machined to fit. someone else will chime in on that I'm sure
     
  3. Pender1

    Pender1 Full Access Member

    Posts:
    281
    Likes Received:
    9
    Joined:
    Nov 12, 2014
    Location:
    SC
    First Name:
    Brian
    Truck Year:
    1986|2014
    Truck Model:
    K5|1500
    Engine Size:
    350|5.3L
    Not cheaper from what I'm finding. Can't find a 8 lug front for <$350 anywhere and the adapters cost roughly half that. And if I need to replace all the bearings in the new axle parts, I've spent even more.

    You're talking about recentering, the hole pattern in them is already right, it's the backspacing that causes the issue, it's something like 7".
     
  4. colonel mustard

    colonel mustard Full Access Member

    Posts:
    87
    Likes Received:
    40
    Joined:
    Apr 4, 2018
    Location:
    louisville ky
    First Name:
    steven
    Truck Year:
    1981
    Truck Model:
    k5 blazer
    Engine Size:
    350

    gotchya. I got my whole 8 lug front axle for 150$

    7" backspacing ?! wow...
     
  5. bucket

    bucket Super Moderator Staff Member

    Age:
    36
    Posts:
    16,142
    Likes Received:
    1,909
    Joined:
    Aug 3, 2010
    Location:
    Usually not in Ohio
    First Name:
    Andy
    Truck Year:
    '77, '78, '79, '84, '88
    Truck Model:
    K5 thru K30
    Engine Size:
    350-454
    You will need spacers for the rear too, so the track width isn't rediculously narrow. A 2 inch spacer should work fine on the front, but a tall tire may rub the drag link on a hard right turn.
     
  6. rpcraft

    rpcraft Full Access Member

    Posts:
    658
    Likes Received:
    200
    Joined:
    May 31, 2016
    Location:
    Texas
    First Name:
    Robert
    Truck Year:
    1985
    Truck Model:
    Jimmy
    Engine Size:
    0.0
    Considering the hummer take offs are close to 37 inches you are going to have to go upwards and trim. If all you are trying to do is match 8 lug setups then converting the front axle to 8 lug is actually the cheaper option provided you can find the parts to do it because all it really takes is the rotors, hubs, brake calipers, and backing plates, but the problem is with military take offs is you will still need to look at lifting the truck to clear the tires. Also you are going to need to swap to 5.11's to have any appreciable take off, or use of third and 4th gears (if you have an OD trans)....
     
  7. Pender1

    Pender1 Full Access Member

    Posts:
    281
    Likes Received:
    9
    Joined:
    Nov 12, 2014
    Location:
    SC
    First Name:
    Brian
    Truck Year:
    1986|2014
    Truck Model:
    K5|1500
    Engine Size:
    350|5.3L
    Why such a low gear? According to the calculator online, 4.10 and 37s are very drivable. I've got a SM465, high gear is 1:1.
     
  8. dvdswan

    dvdswan Full Access Member

    Posts:
    304
    Likes Received:
    101
    Joined:
    Mar 11, 2014
    Location:
    Port Orchard, WA
    First Name:
    Dave
    Truck Year:
    1978
    Truck Model:
    K10
    Engine Size:
    350
    Drivable, yes. Off-road, not so much. The 4.10 rear end works great on a 31" tire, on a 37" tire the 4.10 turns into a 3.30 gear (this is just a swag). Great highway mpg, not so great torque and fun factor.
     
  9. Craig 85

    Craig 85 Supporting Member Supporting Member

    Posts:
    1,046
    Likes Received:
    511
    Joined:
    Jan 25, 2017
    Location:
    Grass Valley, CA
    First Name:
    Craig
    Truck Year:
    1985
    Truck Model:
    K30 SRW
    Engine Size:
    454/TH-400/NP205
    The elephant in the room is what tires are you going to run? 16.5" tires are hard to find. Like stated above unless your going to get some cheap used 37" military tires, you're looking at about $300+ for new tires.
     
  10. Pender1

    Pender1 Full Access Member

    Posts:
    281
    Likes Received:
    9
    Joined:
    Nov 12, 2014
    Location:
    SC
    First Name:
    Brian
    Truck Year:
    1986|2014
    Truck Model:
    K5|1500
    Engine Size:
    350|5.3L
    Well I was planning on military take offs, but I may have found a different path with a set of 17s now, I'm going to explore that.
     
  11. Pender1

    Pender1 Full Access Member

    Posts:
    281
    Likes Received:
    9
    Joined:
    Nov 12, 2014
    Location:
    SC
    First Name:
    Brian
    Truck Year:
    1986|2014
    Truck Model:
    K5|1500
    Engine Size:
    350|5.3L
    Well this thing will probably spent 75-80% of its life on pavement, so drivable is important. I'll probably wind up on 35s long term. I'm on 33s with 3.73 right now and it does pretty good for what I use it for.
     
  12. rpcraft

    rpcraft Full Access Member

    Posts:
    658
    Likes Received:
    200
    Joined:
    May 31, 2016
    Location:
    Texas
    First Name:
    Robert
    Truck Year:
    1985
    Truck Model:
    Jimmy
    Engine Size:
    0.0
    I think you will be better off with the 17's. Tires are readily available. I have them on my Frontier, stock and can run anything from 260/70-17 up to 33's on a 17, and there are plenty of bigger tires if I wanted to force them to fit.

    I am doing the 14 bolt conversion on my K5 my own self and have the backing plates for the 3/4 ton brakes/gear for my front 10 bolt but the thing you want to remember is once you go over a certain size (and offset) you are going to be putting a lot of sprung weight on the axle. The 14 bolt can take it fine but the front 10 bolt won't like tires bigger than a 33 inch tire for very long. It is definitely going to wear out the ball joints faster. You will start to wear stuff out more rapidly than a smaller tire. I honestly wouldn't go much bigger than a 33, and with your 4 speed on a 3.73 that is kind of the sweet spot because of your 1.1. If you had an OD trans I say 4.10 is the better option but it seems like you are doing it right. 2 inches more of tire isn't going to really clear that much more of an obstacle, considering it is less than an inch in total height, and then your gearing is going to be a wreck and I am pretty sure you will not be happy with that.

    Just my .02$ though.
     

Share This Page