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Sounds like you and I think a LOT alike. My wheelbase will be longer and I'll have more overhang with a "Porch" on the back to house the BBQ grill and parking for a 4 wheeler, but otherwise, quite a bit alike. PM inbound....

Well... I did some research and some math (And now my head hurts...) The Caterpillar/D7155/Semi-Automatic trans in the M920 has 16 forward speeds, #15 is 1:1 and #16 is 0.83 (Overdrive) According to TM 9-2320-273-10 the "Sweet spot" for this truck is between 1,800 and 1,900 rpm. "When driving...

I was watching one of those Saturday afternoon TV shows about "cars/trucks/4x4/whatever with a motor" shows and they had a tech segment about stuff to do to make your ride better. It went something very much like this: (Host to camera): Have you installed new, brighter, higher power headlights...

Outstanding info Soni, THANKS (Yet again!) 5 - 5.5mpg is not really impressive but then again, it is about the same a gas 460 or 454 1 ton towing a large 5th wheel camping trailer would get and the 920 can tow/haul slightly more weight so I guess it is livable. Assuming they are available...

pm sent!

Those are "Probably" take outs from the M920 and would therefore have the same gears I'm trying to replace. The FMTV axles would be way cool if they are the ones I am thinking of ( Oshkosh Products TAK-4 Independent Suspension ) (See picture below) Looks like you can just slide the entire unit...

Thats great info, Thanks !! What size tires (How tall) are you running on the 920 at that time? (I assume your running stock gears?) And what RPM's were you pushing at 56mph? Are lockouts an option? (Do they make them - Where to get them?)

Project update: I have: Read literally hundreds of posts in almost as many threads both here on SS and on some other boards. Personally sat in, rode in and or drove several different MV's and commercial trucks. Spoken at length to my primary chassis fabricator in several different sessions...

Try: SUV & Truck Tire Chains Or Truck Tire Chains for Trucks and SUVs

If I did my math right, that is 41 FEET per gallon -OR- 133 gallons per mile! :shock: :cookoo: :shock: :cookoo: :shock: Gee, that is not very good mileage - I don't think I want one of those. :-D :driver: And now, back to the real reason for this thread... where to get the gears??

$1200 for an open diff or for a locker? I am GUESSING but the fact you were looking at them does mean 4.11/4.56 gears are available? (Therefore the quest to find carriers that would work with them). I insist on keeping the lockers. $1200x3=$3600. That is a lot of $ to be sure but with the cost...

So what exactly does it do in "Emergency mode"?

I am trying to find a souse to purchase ring and pinion gears for the front and rear axles on the M920. I believe the front is: Rockwell/Hypoid FDS-1807 with 6.17 gears currently. I believe the rear is: Rockwel/SUHD also with 6.17 gears and Detroit locker. An additional questions is what...

How long is the bed on those trucks? Do you usually use that same length? Is a drop side bed an option?

Crazy? No, actually that is probably the most sensible thing ever posted on this or any other internet board. Good on you![thumbzup] Only 25 days to go till headlights! :-o

Warn Industries - Hydraulic Winches: Series 18 The Warn 18k hydraulic uses 15gpm. I am not positive but I would be willing to bet that is way more than your power steering pump can put out. It also has a MSRP of almost $2500. Just guessing but the "street price" will likely be around $2,000...

LOL... yeah, that 10ga will be "extra good".... :) (Especially since it is already in stock/paid for!) Slightly overkill but hey, isn't the whole MV thing?? :) That is actually a pretty good idea. Somewhat of a pain to paint it all on unless you just made a big "blob" that covers everything on...

If I recall correctly the siren will be fused with a 20 amp ATO type fuse meaning it will probably draw about 12-15 amps. My suggestion is that if this is a permanent install I would install a dedicated 12v system with it's own alternator and at least 1 battery. If it is temporary for a...

Soni, I am bidding on a 920 as I type this. Your insights and information will be invaluable if I win the auction and if not this one, I'll try again next week... Just that tip on the lighter lighter plug probably saved my iPhone from going up in a puff of smoke so yeah, even before I have...

Dug, Lots of good ideas, but nobody has answered your questions yet. I'll forget alternatives to your plan and just answer your questions for you. See below.. :) Although not a question I do have a comment; This sounds like a good plan to me. Very easy to convert back to stock should you (Or...