Ex military truck gears - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Redneck79 · 04-24-2016, 09:41 AM

I'm thinking to buy an 1985 ex military K30 6.2 liter diesel, but I know that military trucks have a modified transmission with different gears.
This one is an automatic 3 gears, do you think it's a boring drive and I should change the transmission ?

**hatzie** · 04-24-2016, 09:51 AM

The CUCV axle gears are 4.56:1
The CUCV TH400 has the same gearing as the Civilian version.

Will you be running it on the highways or locally?

andrewmp6 · 04-24-2016, 09:55 AM

Its got a diesel turbo 400 and is a 4.56 gear ratio all oem gm parts.

GM72K10 · 04-24-2016, 09:58 AM

Nothing special about the trans in a CUCV, all TH400s

Redneck79 · 04-24-2016, 10:07 AM

I will run it mainly locally, I'm looking for something with a lot of torque for have fun, not for higways

Redneck79 · 04-24-2016, 10:09 AM

Quote:

Originally Posted by hatzie

The CUCV axle gears are 4.56:1
The CUCV TH400 has the same gearing as the Civilian version.

Will you be running it on the highways or locally?

I will run it mainly locally, I'm looking for something with a lot of torque for have fun, not for higways

Alex V. · 04-24-2016, 04:45 PM

A diesel with 4.56's sounds like just the ticket, then.

Redneck79 · 04-24-2016, 05:10 PM

Quote:

Originally Posted by Alex V.

A diesel with 4.56's sounds like just the ticket, then.

"Sound like just the ticket" ?
Sorry but I have not get

I'm from Italy and I don't understand all the slang

Jeramy · 04-24-2016, 05:40 PM

he means it will do exactly what you are looking for

Redneck79 · 04-24-2016, 06:06 PM

Good, thanks for the infos

Alex V. · 04-24-2016, 08:31 PM

Quote:

Originally Posted by Jeramy

he means it will do exactly what you are looking for

Sorry. What he said.

Redneck79 · 04-25-2016, 04:06 AM

Quote:

Originally Posted by Alex V.

Sorry. What he said.

No problem

daddyjeep · 04-25-2016, 12:34 PM

I didn't realize you were from Italy either. With your username and Avatar Would have never guessed. I didn't know there were rednecks in Italy.

slotard · 04-25-2016, 01:11 PM

With a 6.2, TH400, 4.56 you'll be at very high RPM on the highway (unless you have significantly larger tires than stock). It'll work well at low speed though.

Redneck79 · 04-25-2016, 02:33 PM

Quote:

Originally Posted by slotard

With a 6.2, TH400, 4.56 you'll be at very high RPM on the highway (unless you have significantly larger tires than stock). It'll work well at low speed though.

Yes, the tires are larger than stock, 36 BF Goodrich All Terrain, I show you some photos.
I was also wondering to put dually wheels on the truck, (I'm a dually fetishist) what do you think about ?
I could have problems to the rear axle ?

KShortell · 04-25-2016, 03:05 PM

Great looking truck!

As an aside, my dad was project manager for the CUCVs back in the 1980s at the U.S. Army Tank-Automotive Command (TACOM). They had some early teething problems, but worked out the kinks early on. They're solid trucks. After all, they're Chevys!

Redneck79 · 04-25-2016, 03:41 PM

Quote:

Originally Posted by KShortell

Great looking truck!

As an aside, my dad was project manager for the CUCVs back in the 1980s at the U.S. Army Tank-Automotive Command (TACOM). They had some early teething problems, but worked out the kinks early on. They're solid trucks. After all, they're Chevys!

Thanks

I want to add spike lug nuts, do you can suggest me a link where I can buy the right ones for the truck ?

slotard · 04-25-2016, 11:22 PM

I imagine you'd need a flatbed in order to fit dually 36s. The internals of the rear axle are the same for 3/4 ton, 1 ton SRW, 1 ton DRW, and CUCV truck (which I think is just a 1 ton SRW). However, the DRW axle is wider. I'm not sure if you could fit dually rears with the axle you have, seems unlikely with the tire size you have. Additionally, the front setup is wider... I'm not sure whether it's the center section or just the hubs on squares, I know modern trucks it's the center section but someone said it was just the hubs on squares.

**hatzie** · 04-26-2016, 10:37 AM

Some M1028 and M1031 CUCV can be found with dual wheels. It was a motor pool add on kit for the M1028 & M1031 making it an M1028-a2.
http://67-72chevytrucks.com/vboard/s...d.php?t=546148

walkerb · 04-26-2016, 11:09 AM

Quote:

Originally Posted by daddyjeep

I didn't realize you were from Italy either. With your username and Avatar Would have never guessed. I didn't know there were rednecks in Italy.

I was also unaware!

GM72K10 · 04-26-2016, 08:49 PM

Dually CUCVs
M1028a2 NP205 converted M1031 or M1028a1
M1028a3 NP208 converted M1028

Redneck79 · 04-30-2016, 07:04 AM

Quote:

Originally Posted by GM72K10

Dually CUCVs
M1028a2 NP205 converted M1031 or M1028a1
M1028a3 NP208 converted M1028

I found this info about CUCV axles by models, do you think are correct ?

M1009
10 bolt axles front and rear with 3.08 gears and a Gov-Loc in the rear (Not Dana 60 front and 14 bolt rear like some believe)
All other CUCV’s
Dana 60 front
Front Capacity 4.5 Quarts
14 Bolt FF rear with Detroit locker and 4.56 gears (some have a true-track locker in the front as well, but it is rare)
Rear Capacity 5.4 Quarts
M1028 needs GM additive

**hatzie** · 04-30-2016, 08:30 AM

Quote:

Originally Posted by Redneck79

I found this info about CUCV axles by models, do you think are correct ?

M1009
10 bolt axles front and rear with 3.08 gears and a Gov-Loc in the rear (Not Dana 60 front and 14 bolt rear like some believe)
All other CUCV’s
Dana 60 front
Front Capacity 4.5 Quarts
14 Bolt FF rear with Detroit locker and 4.56 gears (some have a true-track locker in the front as well, but it is rare)
Rear Capacity 5.4 Quarts
M1028 needs GM additive

The M1009 is the K series Blazer with 10 bolt axles.
Axle capacity is in PINTS not quarts...

The M1028A2 and A3 should have the transfer case of the vehicle it was converted from. M1028 dually conversions should still have the NP208 transfer case M1031 dually conversions should have the NP205.

The CUCV WIKI on the Steel Soldiers forum. http://www.steelsoldiers.com/showthr...7427-Cucv-Wiki

Redneck79 · 04-30-2016, 09:11 AM

Quote:

Originally Posted by hatzie

The M1009 is the K series Blazer with 10 bolt axles.
Axle capacity is in PINTS not quarts...

The M1028A2 and A3 should have the transfer case of the vehicle it was converted from. M1028 dually conversions should still have the NP208 transfer case M1031 dually conversions should have the NP205.

The CUCV WIKI on the Steel Soldiers forum. http://www.steelsoldiers.com/showthr...7427-Cucv-Wiki

So I have to avoid the M1009 because it have not Detroit Locker in rear axle, Dana in the font and not 4.56

Greenlee · 04-30-2016, 10:37 AM

M1009 is the CUCV version of a k5 Blazer. The truck you are looking at buying in the pictures above appears to be a M1008.

04-24-2016, 09:41 AM	#1
Redneck79 Registered User Join Date: Apr 2016 Location: Milan, Italy Posts: 22	Ex military truck gears I'm thinking to buy an 1985 ex military K30 6.2 liter diesel, but I know that military trucks have a modified transmission with different gears. This one is an automatic 3 gears, do you think it's a boring drive and I should change the transmission ?

04-24-2016, 09:51 AM	#2
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Ex military truck gears The CUCV axle gears are 4.56:1 The CUCV TH400 has the same gearing as the Civilian version. Will you be running it on the highways or locally? __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

04-24-2016, 09:55 AM	#3
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Ex military truck gears Its got a diesel turbo 400 and is a 4.56 gear ratio all oem gm parts.

04-24-2016, 09:58 AM	#4
GM72K10 Next! Join Date: Jan 2003 Location: Eastern Pa. Posts: 2,483	Re: Ex military truck gears Nothing special about the trans in a CUCV, all TH400s __________________ 86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck

04-24-2016, 10:07 AM	#5
Redneck79 Registered User Join Date: Apr 2016 Location: Milan, Italy Posts: 22	Re: Ex military truck gears I will run it mainly locally, I'm looking for something with a lot of torque for have fun, not for higways

04-24-2016, 04:45 PM	#7
Alex V. Registered User Join Date: Mar 2013 Location: Campbellsville, KY Posts: 888	Re: Ex military truck gears A diesel with 4.56's sounds like just the ticket, then. __________________ Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue.

04-24-2016, 05:40 PM	#9
Jeramy Registered User Join Date: Dec 2014 Location: Mulberry, AR Posts: 222	Re: Ex military truck gears he means it will do exactly what you are looking for __________________ 1981 Silverado C10 LS/4l60e My truck may be loud and ugly but I love her like bacon

04-24-2016, 06:06 PM	#10
Redneck79 Registered User Join Date: Apr 2016 Location: Milan, Italy Posts: 22	Re: Ex military truck gears Good, thanks for the infos

04-25-2016, 12:34 PM	#13
daddyjeep Registered User Join Date: Nov 2015 Location: Smethport, PA Posts: 1,213	Re: Ex military truck gears I didn't realize you were from Italy either. With your username and Avatar Would have never guessed. I didn't know there were rednecks in Italy. __________________ 85 K30 crew cab dually - Project http://67-72chevytrucks.com/vboard/s...d.php?t=694939 87 Wrangler Rock Crawler - Reason for the project http://www.wranglerforum.com/f330/da...ld-122601.html 04 1500 crew cab http://67-72chevytrucks.com/vboard/s...d.php?t=786514

04-25-2016, 01:11 PM	#14
slotard Registered User Join Date: Nov 2014 Location: Alameda, CA Posts: 877	Re: Ex military truck gears With a 6.2, TH400, 4.56 you'll be at very high RPM on the highway (unless you have significantly larger tires than stock). It'll work well at low speed though. __________________ 1973 C20, 350/350

04-25-2016, 03:05 PM	#16
KShortell Registered User Join Date: Oct 2003 Location: Chesapeake, VA Posts: 734	Re: Ex military truck gears Great looking truck! As an aside, my dad was project manager for the CUCVs back in the 1980s at the U.S. Army Tank-Automotive Command (TACOM). They had some early teething problems, but worked out the kinks early on. They're solid trucks. After all, they're Chevys! __________________ Semper Paratus

04-25-2016, 11:22 PM	#18
slotard Registered User Join Date: Nov 2014 Location: Alameda, CA Posts: 877	Re: Ex military truck gears I imagine you'd need a flatbed in order to fit dually 36s. The internals of the rear axle are the same for 3/4 ton, 1 ton SRW, 1 ton DRW, and CUCV truck (which I think is just a 1 ton SRW). However, the DRW axle is wider. I'm not sure if you could fit dually rears with the axle you have, seems unlikely with the tire size you have. Additionally, the front setup is wider... I'm not sure whether it's the center section or just the hubs on squares, I know modern trucks it's the center section but someone said it was just the hubs on squares. __________________ 1973 C20, 350/350

04-26-2016, 10:37 AM	#19
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Ex military truck gears Some M1028 and M1031 CUCV can be found with dual wheels. It was a motor pool add on kit for the M1028 & M1031 making it an M1028-a2. http://67-72chevytrucks.com/vboard/s...d.php?t=546148 __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 04-26-2016 at 10:43 AM.

04-26-2016, 08:49 PM	#21
GM72K10 Next! Join Date: Jan 2003 Location: Eastern Pa. Posts: 2,483	Re: Ex military truck gears Dually CUCVs M1028a2 NP205 converted M1031 or M1028a1 M1028a3 NP208 converted M1028 __________________ 86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck

04-30-2016, 10:37 AM	#25
Greenlee Registered User Join Date: Jun 2004 Location: El Lago, TX Posts: 1,668	Re: Ex military truck gears M1009 is the CUCV version of a k5 Blazer. The truck you are looking at buying in the pictures above appears to be a M1008.



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