2wd to 4wd dually - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Matt Man · 11-11-2009, 08:17 PM

i want to know all the steps its gonna take.

truck is a 86 c30 crew cab 454/400.

shilo · 11-11-2009, 08:24 PM

alot. not to be a smart ass but there is a ton of info if you google it or this site. For starters a transfer case and proper adapter and output shaft for your transmission. a dually front axle so you only have one spare tire. a set of leafs or some badass 4-link front suspension. a few holes to be drilled on you frame and a driveshaft. Not too much but definately work.

why do you want to make a 4x4 when your sig says future lowering plans and 18" wheels?

b454rat · 11-11-2009, 11:20 PM

I'm doing this to my truck now, you can search for my s/n and that will give you an idea. There are also couple other builds out there.

ghettoluxury · 11-11-2009, 11:30 PM

you can mate a NP205 with the adapter for the 400 directly to your 2wd tranny

*2tons of fun* · 11-11-2009, 11:31 PM

buy drw d60.
buy b52 kit from diy4x.
find whatever trany tcase combo you want.

install.

**special-K** · 11-12-2009, 07:55 AM

Add crossmembers,driveshafts,linkage/shifter,exhaust work...
if you find "any" 4wd model in 73-87 era for a donor you`ll be miles ahead.That`s Blazer to 3+3.The 1t axle will bolt up to the rest and all that is the same 10-30 series.

**Dieselwrencher** · 11-12-2009, 10:25 PM

Quote:

Originally Posted by ghettoluxury

you can mate a NP205 with the adapter for the 400 directly to your 2wd tranny

What? Only if it had the proper out put shaft, and there are 3 different TH400 output shafts. He might get lucky, but at worst case he'll have to change his output shaft and find the correct adaptor for 205, 208, or 203 case.

**Dieselwrencher** · 11-12-2009, 10:26 PM

It is a lot of work, but not all that hard. It can be done. Like already mentioned a donor truck would make it easier on you as well. If you want to retain bud wheels you need a DRW D60 front, or buy billet spacers to bolt on your new 4wd front axle.

*2tons of fun* · 11-13-2009, 12:55 AM

and the 2wd th400 that is in his truck is the proper output shaft for the th400 -205 adapter.

ghettoluxury · 11-13-2009, 07:03 AM

Quote:

Originally Posted by Dieselwrencher

What? Only if it had the proper out put shaft, and there are 3 different TH400 output shafts. He might get lucky, but at worst case he'll have to change his output shaft and find the correct adaptor for 205, 208, or 203 case.

I have done this about 15 times and never had to change the output shaft.

**Dieselwrencher** · 11-13-2009, 04:10 PM

Ok good deal. Most of the time the 1 ton dually big block 2wd's have the bolt on output yoke. Everyone I have torn apart has I didn't think a 205 would slide on over threads of that out put shaft.

*2tons of fun* · 11-14-2009, 12:24 AM

except fo rthe fact that the threads are femal and have no bearing on the spline or ingaugement......

**Dieselwrencher** · 11-14-2009, 12:40 AM

Ok, sorry,good info to know. I didn't realize this shaft would work with the 205 coupler.

11-11-2009, 08:17 PM	#1
Matt Man Registered User Join Date: Oct 2009 Location: Buhl, Idaho Posts: 1,438	2wd to 4wd dually i want to know all the steps its gonna take. truck is a 86 c30 crew cab 454/400. __________________ 86 c30 crew cab dually 454/400 4/6 drop SOLD 1-8-11 1981 chevy K10 short Bed Scottsdale SOLD 10-26-2020 67 GMC Stepside Straight six/3 on the tree "The Peach" 2020 Silverado Double Cab LT Z71 5.3 8 speed Daily Driver K10 build http://67-72chevytrucks.com/vboard/s...d.php?t=671934 The Peach build http://67-72chevytrucks.com/vboard/s...d.php?t=733903

11-11-2009, 08:24 PM	#2
shilo Registered User Join Date: Jun 2005 Location: Grand Junction , CO Posts: 602	Re: 2wd to 4wd dually alot. not to be a smart ass but there is a ton of info if you google it or this site. For starters a transfer case and proper adapter and output shaft for your transmission. a dually front axle so you only have one spare tire. a set of leafs or some badass 4-link front suspension. a few holes to be drilled on you frame and a driveshaft. Not too much but definately work. why do you want to make a 4x4 when your sig says future lowering plans and 18" wheels? __________________ 71 swb 4x4, 37" Iroks, t400/205 496 77 CJ-7, Narrowed Dana 60 Lockrite, 14 Bolt Spool, 4.56 gears, 39.5" boggers. 360 t-18/d20

11-11-2009, 11:20 PM	#3
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,469	Re: 2wd to 4wd dually I'm doing this to my truck now, you can search for my s/n and that will give you an idea. There are also couple other builds out there. __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS

11-11-2009, 11:30 PM	#4
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: 2wd to 4wd dually you can mate a NP205 with the adapter for the 400 directly to your 2wd tranny __________________ 1949 Five Window, 1973 Step Side, 2000 Z71

11-11-2009, 11:31 PM	#5
2tons of fun Account Suspended Join Date: Jan 2009 Location: galt ca, Posts: 749	Re: 2wd to 4wd dually buy drw d60. buy b52 kit from diy4x. find whatever trany tcase combo you want. install.

11-12-2009, 07:55 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 2wd to 4wd dually Add crossmembers,driveshafts,linkage/shifter,exhaust work... if you find "any" 4wd model in 73-87 era for a donor you`ll be miles ahead.That`s Blazer to 3+3.The 1t axle will bolt up to the rest and all that is the same 10-30 series. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-12-2009, 10:26 PM	#8
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: 2wd to 4wd dually It is a lot of work, but not all that hard. It can be done. Like already mentioned a donor truck would make it easier on you as well. If you want to retain bud wheels you need a DRW D60 front, or buy billet spacers to bolt on your new 4wd front axle. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

11-13-2009, 12:55 AM	#9
2tons of fun Account Suspended Join Date: Jan 2009 Location: galt ca, Posts: 749	Re: 2wd to 4wd dually and the 2wd th400 that is in his truck is the proper output shaft for the th400 -205 adapter.

11-13-2009, 04:10 PM	#11
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: 2wd to 4wd dually Ok good deal. Most of the time the 1 ton dually big block 2wd's have the bolt on output yoke. Everyone I have torn apart has I didn't think a 205 would slide on over threads of that out put shaft. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

11-14-2009, 12:24 AM	#12
2tons of fun Account Suspended Join Date: Jan 2009 Location: galt ca, Posts: 749	Re: 2wd to 4wd dually except fo rthe fact that the threads are femal and have no bearing on the spline or ingaugement......

11-14-2009, 12:40 AM	#13
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,143	Re: 2wd to 4wd dually Ok, sorry,good info to know. I didn't realize this shaft would work with the 205 coupler. __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.* Last edited by Dieselwrencher; 11-14-2009 at 12:49 AM.



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