Testing CUCV M1008 Posi-Track

Truck was in 2wd the whole time. If I tried this with my duramax the outcome would be much worse.

[@johndeereman2009]

nice to see a 6.2 diesel still roaming around

[@Ratkill9000]

These trucks are essentially a Chevy K30 with the Gm 14 bolt rear and Dana Corp 60 front axle. 700r4 auto transmission with 4.56 gears. Trucks were not really rated to go above 55mph. This was mainly because the deuce and a half trucks and larger could not go much faster than 55 or at least you would not want to take them over that speed. You can still get these M1008 trucks from Government auctions for cheap or even online too. Changing the gears from a 4.56 to a 3.73 would help out mileage and you could get 20mpg or so...but the 700r4 would be hunting gears on a small hill or headwind. The military 6.2L GM diesel runs a 24 volt system with 2 12 volt alternators in series for the starter, but everything else is 12 volt. These are street legal trucks and can be bought. Not many like the old GM 6.2L IDI because it was only built for a little work but mostly fuel economy. Civilian trucks came in 130hp and 143hp. Military apps such as these came with around 165hp and 330lb/ft of torque at 2100 RPM.

[@dieseldefenseoffroad]

Ratkill9000 These D30's came with TH400s.

[@enterBJ40]

Totally agree. No 700R4 here, just the trusty TH400

[@BullpupsRule]

A posi track is a limited slip differential. The vehicle in this video has a Detroit locker not a "Posi Track".

[@BullpupsRule]

I keep hearing how "WEAK" the np208 is. In fact its not weak. Its not as strong or durable as the NP205 but it is NOT a WEAK transfercase. Also with tires up to 35" I doubt you would break it in this vehicle with its current engine. Now throw on some 40" tires and put a big block in then I would say yes this is the "weak" link. In stock form the NP208 performs very well.

[@pfcthomasblackhawk1100]

This vehicle looks Awesome

[@acme663ryo]

I had a 6.2 in a K30 crewcab of the same vintage and that truck would go anywhere. I got my Dodge Cummings Club Cab stuck badly several times trying to go places that old farm truck passed easily. As I moved both the tires and the lift over to the Dodge I always thought the difference was interesting.

[@acersalman8258]

Beautiful trucks ❤❤❤❤❤❤❤❤

[@pfcthomasw.9394]

LUV THIS AWESOME VEHICLE, WISH I COULD OWN IT. SADLY I'm MEDICALLY RETIRED.

[@oerllikon2]

Good ol DD, lol. Looks like a fun vehicle, a CUCV would also be fun too

[@Voodoo_One]

Nice battery holder...^^

[@JasonWaterfalls13]

@DieselPowerTV A 12-valve Cummins (P-pumped version) would be the best option. Easiest swap also.

[@DriverSideImpact1008]

@HUMMVE100 The M1008's used NP208 T-Case. M1031 and some M1028's used NP205's(205's are super tough). All CUCV's had a TH400 trans, Dana 60 front axle, A Corporate 14 bolt with a Detroit locker (a.k.a. Gov-Lok), and 4.56 gears. Additionally, M1028 & M1031's had limited slip in the front axle. Regardless, the drivetrain on the trucks is very tough, and the 6.2 diesel isn't a bad engine either. If you did an engine swap, your best bet would be to get a 5.9L 6BT Cummins attached to a NV4500 trans.

[@rbarger71]

Those are some bad trucks and that 6.2L screams running down the highway @55 mph too. Made for long trips to Fort Sill or Fort Smith for annual training. I never cared much for those 4.56 gears, but they were built more for off-roading(in the military sense of the word) than running at highway speeds. Still, tho, I think 3.73 would have been better cos not once did I ever see any of these CUCV's pulling anything. Wouldn't mind having one them tho as they were built heavy duty.

[@noahgaray7923]

rbarger71 they needed the 4.56s because the 6.2 was a piece of shit with no power. The military picks the lowest bid. Too bad ford hadn’t had a lower bid. Would love to have seen ford CUCVs with a 6.9 c6 F350 with 4.10s

[@rbarger71]

@@noahgaray7923 That would have been an awesome package for sure.

[@tpvalley]

is a positrack a limited slip of locking differential in american?

[@DarkIZero]

The Duramax probably would have done just as well, given the same load in the bed. That probably helped a lot with 2wd.

[@miniatures1]

Back in a time when these trucks were cheap and some what available the good days.

[@JasonWaterfalls13]

@DieselPowerTV A P-pump 12-valve Cummins would be the best option. Easily swap also. Unless your like the 24-valve shitty VP44 and dropping valve seats...

[@Vinnie305]

I have no issues with the strength of my np208 I drag 3000 lb logs through rough terrain with mine m y 6.2 does it in 2wd idling with my nv4500 in first gear

[@brandondannys-menary3678]

A truck like this is my dream truck, it's slow but all u half to do is turbo it

[@BogieWheelz]

Dropped a 6.5 turbo in mine, couldn't be happier! Plus that turbo whistle...

[@H95Shooterv12]

Yes, you can see locking hubs.

[@pfcthomasblackhawk1100]

L U V the Troop Transport.

[@13tucker45]

Most likely this has the np208, which is a weak chain driven tcase, but a quick swap to the gear driven np205, and you'd be solid, I believe.

[@Willybillay01]

@HUMMVE100 these have one of the strongest tcase's made (np205) it will hold up

[@irishmo87]

Are they 4 wheel drive

[@SOUTHERNANDPROUD1861]

@DriverSideImpact1008 My 1985 m-1028 has the NP205.

[@robby844]

@jonp1116 and they lasted forever. theres ones at pendleton with over 400,000 that have had no trouble

[@DriverSideImpact1008]

@WillDaBeast696969 Nope. All M1008's had an NP208 T-Case. M1031's and some M1028's had NP205's.

[@HouseForLife6]

That an army pickup ?

[@BigCool95]

Are these trucks street legal?

[@DieselPowerTV]

@HUMMVE100 You can do a engine swap with a duramax, cummins or powerstroke. If I had a 24v cummins I would put it in this truck.

[@sonnydayz2118]

Certain serial # range is prone to cracked heads w/24 valve Cummins.

[@sonnydayz2118]

Let me know when you are selling it?

[@jamisgood21]

@HouseForLife6 Yup, M1008 is the military name for their 3/4 ton (usually diesel) pickups. We still call em' that today. Now we got Duramax's though.

[@Skyfall-sv8df]

M1008 is a 1 ton, not 3/4

[@jamisgood21]

@@Skyfall-sv8df Fair enough. Maybe so. Can't say for sure. You very well may be right.

[@Skyfall-sv8df]

@@jamisgood21, m1009 is the only one that isn't a 1 ton, it is a upgraded 1/2 ton.

[@nascaramerican770]

M1008 is a 1 1/4 ton.

[@justinstearns9723]

@@nascaramerican770 According to the Military Spec anyways. They say the M1009 Blazers are a 3/4 ton too. Still pretty much just a K30.

[@DieselPowerTV]

@HUMMVE100 I don't know enough about it to give you a good answer.

[@Vinnie305]

what is really wrong with the 6.2 I have one of these trucks mine is non military I swapped my 454 out for a 6.2 and swapped my th400 auto for an nv4500 no turbo yet and I dont think I have desire to put one on I had a 98 dodge with a cummins and personally I favor the 6.2 guess its opinion based on what I do to my truck but i think anyone who put an nv4500 behind a 6.2 and new the ideosyncrocies of the 6.2 and how to overcome them would never consider a cummins swap as an option

[@jonp1116]

@robby844 because they got good mpg

[@BullpupsRule]

No. It has a NP208.

[@Boot_185]

Not much of a test should kept going never broke the wheels yet. I live my G80 code in my glovebox of my bravada (G80= locking diff front and rear also known as posi)

[@BullpupsRule]

Wrong. This unit has a NP208. The NP205 was a very rare Tcase in the CUCV family. The M1031 had them and a few select M1028 had them.

[@iMatt65]

@jamisgood21 This M1008 = 5/4 Ton

[@robby844]

@HUMMVE100 theres nothing wrong with the 6.2 or the 6.5 turbo diesel.... they were two of the best detroits that detroit diesel ever built. if they werent any good would the government specify they wanted them instead of cummins, CAT or any other maker? as for your trans question... you can go with an allison auto as for a manual trans id have to dig further

[@DieselPowerTV]

1985

[@Willybillay01]

@DriverSideImpact1008 shit thats what i meant my badddd

[@flight2k5]

These have detroit lockers, not "posi tracs."

[@rustedpower7994]

Posi in front

[@flight2k5]

@@rustedpower7994 locker in front

[@rustedpower7994]

You are correct just looked into it open front and only some m1028s have posi in the front

[@pabloestebandevidal]

saludos cordiales desde ARGENTINA in my country there is no k20, only the line "d20" (4cil international diesel) from 1990 to 1997, I have a d20 turbo and an avalanche 5.3 .. 14 Chevy Avalanche entered my country .. Duramax diesel ever sold and not sold silverado 4 years with 6 cyl diesel, from 1997 to 2001 .. when policies change buy a duramax .. best regards from ARGENTINA

[@roydied15]

whats so bad about the motor? Yeah, it doesn't make a lot of power, but if you wanna go fast, buy a car. These are meant to be bulletproof, torquey, offroad monsters. Nothing you'd every want to take to the strip anyway.

[@Wanous-hv7zo]

Gutless turd engine