Allison M916 + Mk48 Cab = 6x6 "FEMTT"

The truck in my avitar is set up with 4.88 gears, a two speed transfer case, an Allison MT 643 and low profile 22.5" tires. It cruises at 58 mph at 2500 rpm.

I would like to drop the rpm's at 58 mph and that is the reason for my interest in the transmission.

Pneumatic System

Here are a few update pics on the FEMTT. I just about got the FEMTT's air system figured out and hooked up. I must admit that it kicked my butt for the last few days! Trying to mate the Mk48 cab's unusual air system, to what is left of the M916's air system, was certainly challenging to say the least! (The front two axles of the truck can be driven seperat from the rear and are plumbed like a vehicle of it's own, when detached!)

Somehow I still found time to make the bracket for the pneumatic throttle actuator. I'm waiting for the propper Heim Joint to arrive so I can connect the linkage to the IP.

Soni, I still can't picture where my tool boxes fit in to the FEMTT project??

I hope you dont have any air leaks! That is a TON of fittings to check!

FireFighterHill said:

I hope you dont have any air leaks! That is a TON of fittings to check!

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Lots of teflon pipe sealant paste....and double checking it with Windex.....

More Pumbing & Wireing....

So today I was getting all the Deutch-connectors wired. This consisted of figuring out all the pin-numbers and match them to their Oshkosh wire number. For some reason the new harness in the cab is all 4-digit numbers where the TM diagram and my older Mk48 cab are 3-digit numbers. It is not to bad though because the seem to have just added a 0 or a 1 in front of the numbers. So by disregarding the first digit it is all back to "normal".

I will post a sheet with all the pin numbers on the Deutch-connectors under the cab an show them paired with their corresponding Oshkosh wire numbers. I will wait until I have a chance to actually try it all out so I don't give out wrong information.

Here are some pics of the Deutch plugs and the special tool needed to crimp the terminals. I do not have the larger tool needed for the really big pins so I just soldered them on.

The two pics with the airlines show the location of the air fittings and their Oshkosh numbers.

great work! looking cool.

I was going to ask you this when it was all done but by that time you will be headed out on your job so here it is. This build has been way beyond the scope of most of the people on here and I can say I have built some strange stuff. WAAAAY beyond anything I would have tackled! Did at any point in this process you think to yourself, "what have I gotten myself into? And should I just quit now"? Not knowing you personally but having followed some of your builds over the last probably 20 years I think I know the answer. Just wonder about your thoughts n this one.

Rick

When you get the pinout confirmed, I'll be downloading it!

Can you also do that with the air line fittings?

patracy said:

When you get the pinout confirmed, I'll be downloading it!

Can you also do that with the air line fittings?

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And while you are at it can you come over and fix all this stuff I thought I could do?

(Sorry Drew, Just couldn't pass on that opportunity)

patracy said:

When you get the pinout confirmed, I'll be downloading it!

Can you also do that with the air line fittings?

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Yes I will post it for both, the airline fittings and the electrical plugs, as soon as I got the info confirmed. I will also post the part numbers for the mating Deutch connectors, that fit the ones on the cab.


Soni

rickf said:

I was going to ask you this when it was all done but by that time you will be headed out on your job so here it is. This build has been way beyond the scope of most of the people on here and I can say I have built some strange stuff. WAAAAY beyond anything I would have tackled! Did at any point in this process you think to yourself, "what have I gotten myself into? And should I just quit now"? Not knowing you personally but having followed some of your builds over the last probably 20 years I think I know the answer. Just wonder about your thoughts n this one.

Rick

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Of course there are times when I wonder what the heck I was thinking when I thought that this was a GOOD IDEA, but most of the time I enjoy the challange of seeing the project through and just endulge in solving all the little daily problems.

What makes some of these projects less enjoyable for me though, is the fact that I always seem to have a DEADLINE looming, that does not leave quite enough time to do it all the way I want to!

Anyway, here are a few more pics from today. I'm working on the engine enclosure / ROPS.
I hope I can get the fenders on tomorrow......

Beautiful work here. The way you have integrated the ROPS to the frame (presumably mounts from old cab) is really really nice. The doghouse looks great-all of it is so well done. Looks like you will have some fun options for fenders and exhaust.
On a side note-master fab-creator jessie James could learn a thing or two from you and your work.
Pete

That is awesome!
Makes my 64 international CO I converted to 4x4 look like a Tonka toy.

Soni, great work! It is a real pleasure watching this thing come together.

What do you plan on doing with the area where your fenders would have been (the area on each side of the engine)? You could do a really cool tool chest/cabinet on each side. In fact, you could hinge them at the top and they could fold up, gull wing style, out of the way for engine access. I tried to quickly sketch this out in the attached pictures.

Rambling Wreck said:

Soni, great work! It is a real pleasure watching this thing come together.

What do you plan on doing with the area where your fenders would have been (the area on each side of the engine)? You could do a really cool tool chest/cabinet on each side. In fact, you could hinge them at the top and they could fold up, gull wing style, out of the way for engine access. I tried to quickly sketch this out in the attached pictures.

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Good place for some spare tires too.

Soni.......if you want to load the FEMTT up on the M920 and bring it to the GA Rally in Oct. I'd cover your chow for the duration. Your custom rigs would be the hit of the show.

wreckerman893 said:

Soni.......if you want to load the FEMTT up on the M920 and bring it to the GA Rally in Oct. I'd cover your chow for the duration. Your custom rigs would be the hit of the show.

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Cover his fuel and you might have a better chance.

I would like to make a comment here. First I would like to say that your work is amazing! I looked at the profile picture above and i think i would have kept the engine cover lower than the cab. I think the coolness of the Hemtt is the cab out there on it's own. If the engine cover was lower (like the cutout in the back of the cab), the cab would be accented better. If you make the engine cover profile the same height as the cab, the cab uniqueness gets lost. Then the truck just looks like an up-armored truck. I guess it depends what look you are trying too achieve.

I am not criticizing your work. I think it is a work of art. I wish I had that kind of talent! I am just making an observation that might be helpful.

DUG said:

Cover his fuel and you might have a better chance.

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I might be able to swing some of that.