International with 5 ton axles and transfer case

Larry Weibert

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Looking for input

Hi guys. I picked up a nice southern 05 int cab and chassis. It has a DT 466 with a Allison 5 spd automatic air brakes. Its like 245 HP stock.
My plan was to use 2.5 or 5 ton transfer case and axles under it only 4 wheels not 6. I have donor M35s and m54s. trucks.

Q I am not sure which is more suited for it power wise.

Q is there a better transfer case reasonable out there that's recommended over the donors i mentioned.

Q someone in another post mentioned mrap axles having lockers not sure if they would be good i hear there pricey.

Q i plan on running 385s or 16-20s i have many of both on rims.

Q if i go with axles that have hydo brakes i would have to put a international hydro system in place of the air thats there now.

Any other input or questions i welcome and once i start it ill keep the pic posts coming. If anyone has items that will work and want to sell please bring them up.


Ive wanted to do this for a long time so i have a nice ride with power steering ,a/c etc. I plan on a m105 trailer on the back maybe make it dump or fine something with drop sides as well. open to ideas on that as well.

Thanks in advance guys
 

pevrs114

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Monroe, NC
I wouldn't give up air brakes at all. If you haven't picked a donor yet, I'd try to find air brake system or one that can easily be adapted to use them. Obviously that'll preclude 2.5T axles and leave you in 5T+ area. The EASIEST would be axles from an M916/17/20.

DT466 is a great motor. '05 will be electronic control, but they're still good engines. Easily in the top 3 midsize (Class 5-6) engines made, in my opinion.

It's also a wet sleeve engine, so rebuilds are a lot cheaper and easier than say a 6BT.
 

simp5782

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M916 from the 1st generation have lockers in the rear.

M39 series transfer case has a sprag so you would have to rig up something for that operation on the T138.

T136 Might hold up fine, but you would have issues using 5 ton or larger axles using those smaller yokes and shafts.
 

Larry Weibert

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Location
Youngstown New York
Thanks for that guys ill start reading about those items.
I am picking up the international in Nashville monday and have it going to Wisconsin to drop the refrigeration unit off the back. Then heading to Buffalo way were i live with the cab and chassis.
Ill abort my donor vehicles use and start looking for those items your speaking of. I remember someone on here had 5 ton axles with lockers and i think they had larger axles shafts as well. Not sure if those were set up for air brakes. I remember seeing alot of axles on iron/gov planet that had air brk and rotor set ups for around 1300 and axle but havent been seeing them anymore. They looked like a 5 ton size at least.
I do see alot of larger transfer cases on iron/gov planet but not sure which ones maybe usable, Ill look into that one you mentioned.

Any other info or item locations welcome. Thankyou Much
 

simp5782

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@74M35A2 had the 5 ton crash truck axles.

Oshkosh 55000 Transfer case is a pretty tough unit. They are on ebay in the $400 range for takeouts, buy 2 and make 1 good one.
 

Larry Weibert

Member
73
40
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Location
Youngstown New York
@74M35A2 had the 5 ton crash truck axles.

Oshkosh 55000 Transfer case is a pretty tough unit. They are on ebay in the $400 range for takeouts, buy 2 and make 1 good one.
Thanks Simp Iam going to call him see if he can get 2 on a pallet. Looks like its hyro or air operated for high low range. It says high is .98 to 1 so i wonder with 588s or the 644 axles were that will put me on the highway with either 385s or 16-20s. not sure but the 5 spd allison i would think would be 1-1 on final.

any thoughts on that.

Hay Wess i just found a thread that you did with that 55000 swap sounds like its a great transfer case. i noticed your thread said it was .98/1 hi and 2.66/1 low range. the guy on ebay says its 2/1 low maybe hes mistaken. anyway your thread answered what the air was for. someone just got back to me on locking diffs so ill ck that out and report back. This is great iam riding shotgun to Nashville to pick up the truck while getting this stuff lined up. SS buddies are the best.
 
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simp5782

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Thanks Simp Iam going to call him see if he can get 2 on a pallet. Looks like its hyro or air operated for high low range. It says high is .98 to 1 so i wonder with 588s or the 644 axles were that will put me on the highway with either 385s or 16-20s. not sure but the 5 spd allison i would think would be 1-1 on final.

any thoughts on that.
Jeepers calculations has an rpm calculator.

It can be air or cable shift. Air solenoids are pricey.

916a1 transfer case shifters with cables are on ebay nos for 150
 
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