What transfre case do i have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CDF302V8 · 06-01-2009, 07:21 PM

Hey Y'all,

I have a 1979 GMC 1/2 ton. What transfer case do i have?

Chevy1TonFun · 06-01-2009, 07:53 PM

probably a NP205, but we need more info or pics.

CDF302V8 · 06-01-2009, 07:59 PM

Quote:

Originally Posted by Ridin' High

probably a NP205, but we need more info or pics.

Okay, i dont have a photo of it now, but i will try to find some info...

CDF302V8 · 06-01-2009, 08:14 PM

That is the shifter it has...

dammitmitchell · 06-01-2009, 08:57 PM

hey dude there should be a tag on the side held on with a single phillips head screw.. if you clean off that tag it will give you all your information
http://www.chuckschevytruckpages.com/drivetrains.html

pulltilbroke · 06-01-2009, 09:18 PM

That shifter knob indcates a NP203, Is it a iron case with a big aluminum tailhousing and a funky linkage setup?

67mater · 06-01-2009, 09:21 PM

i would bet it's not a 205 being a half ton. my bet is a 203, especially if it has the shift pattern shown in the flyer. 203 is a full time case, that's why there's not 2wd. need a pic from the back

67ZL1 · 06-01-2009, 09:59 PM

From what i've read a 203 and 205 look alike. I was told the easiest way to tell is the idler shaft has a 3 bolt cover on the back of the t-case.

1969 GMC · 06-02-2009, 12:10 AM

what tranny in the truck? i am guessing an auto?

since it has the 203 knob, i'm guessing 203.

CDF302V8 · 06-02-2009, 06:42 AM

Quote:

Originally Posted by 1969 GMC

what tranny in the truck? i am guessing an auto?

since it has the 203 knob, i'm guessing 203.

Yeah, it has a Turbo 350

**special-K** · 06-02-2009, 06:53 AM

You have a 203 if that`s the pattern you have and the same shifter.It`s full-time.Do your hubs have lock-outs?If they don`t,it`s still fulltime.If it has lock-out hubs,it has been converted(good idea).They operate off a drive chain rather than all gear.The chain can stretch and need replaced.

Dooley · 06-02-2009, 07:53 AM

In stock form a 1979 with automatic transmission will have a 203 transfer case. Being a 1979 it will have the updated chain/gears which started part way through the 1978 model year. The chain is narrower and the gears have a much steeper pitch to eliminate slippage when showing some wear. GM squarebodies did not use the 205 with the automatic transmission until the 1980 model year,(all models got the 205 in 1980). GM used the 205's in 1 ton K/V models through 1991).

CDF302V8 · 06-02-2009, 03:45 PM

Quote:

Originally Posted by special-K

You have a 203 if that`s the pattern you have and the same shifter.It`s full-time.Do your hubs have lock-outs?If they don`t,it`s still fulltime.If it has lock-out hubs,it has been converted(good idea).They operate off a drive chain rather than all gear.The chain can stretch and need replaced.

Nope, no lock-outs. Thanks for the info!

Blazer1970 · 06-03-2009, 06:13 AM

Quote:

Originally Posted by Dooley

GM squarebodies did not use the 205 with the automatic transmission until the 1980 model year.

Some did. I parted out a '73 K20 that came with a TH350/205. I am not sure if this was even an option by '79 though.

**special-K** · 06-03-2009, 07:22 AM

Full-time 4wd was an option.An automatic truck could have the 205 and lockouts.

Dooley · 06-08-2009, 12:29 AM

Quote:

Originally Posted by special-K

Full-time 4wd was an option.An automatic truck could have the 205 and lockouts.

Full time 4x4 was standard with automatic transmission.

06-01-2009, 07:21 PM	#1
CDF302V8 Registered User Join Date: May 2009 Location: Holland, Michigan Posts: 12	What transfre case do i have? Hey Y'all, I have a 1979 GMC 1/2 ton. What transfer case do i have?

06-01-2009, 07:53 PM	#2
Chevy1TonFun Grease Monkey Join Date: Oct 2007 Location: Fresno CA Posts: 750	Re: What transfre case do i have? probably a NP205, but we need more info or pics. __________________ Tow Rig: 2012 Chevy 2500HD CCSB LTZ Z71 4x4 Duramax Ultimate Offroad Build: 1978 Chevy Silverado K30 Crewcab Build Link http://67-72chevytrucks.com/vboard/s...d.php?t=654053 Mud Truck: 1972 Chevy Cheyenne K30 4x4, 468/400/205, D60/D70HD, 18" Custom Lift, 17x39" IROKs FOR SALE http://67-72chevytrucks.com/vboard/c...ton-4x4&cat=12

06-01-2009, 08:14 PM	#4
CDF302V8 Registered User Join Date: May 2009 Location: Holland, Michigan Posts: 12	Re: What transfre case do i have? That is the shifter it has... Last edited by CDF302V8; 06-01-2009 at 08:15 PM.

06-01-2009, 08:57 PM	#5
dammitmitchell the pollock Join Date: May 2008 Location: abilene, texas Posts: 4,423	Re: What transfre case do i have? hey dude there should be a tag on the side held on with a single phillips head screw.. if you clean off that tag it will give you all your information http://www.chuckschevytruckpages.com/drivetrains.html __________________ Jack of ALL trades, Master of none.. (but one... procrastination) Army vet 02-08 RIP El Jay! Miss you brother! http://67-72chevytrucks.com/vboard/s...d.php?t=343538 http://67-72chevytrucks.com/vboard/s...d.php?t=386042

06-01-2009, 09:18 PM	#6
pulltilbroke Registered User Join Date: Mar 2008 Location: Eagle Ne Posts: 356	Re: What transfre case do i have? That shifter knob indcates a NP203, Is it a iron case with a big aluminum tailhousing and a funky linkage setup? __________________ 60 4x4,235,SM420,Rockwell T221,D44/HO33 sold 4/12 67 C-20,292,SM420,HO72 90 Dodge W250 Cummins,NV4500HD,205,D60/D80 93 Dodge W350 Dually Cummins, Getrag, 205,D60/D70 Last edited by pulltilbroke; 06-01-2009 at 09:19 PM.

06-01-2009, 09:21 PM	#7
67mater Registered User Join Date: Sep 2007 Location: Mundelein, IL Posts: 862	Re: What transfre case do i have? i would bet it's not a 205 being a half ton. my bet is a 203, especially if it has the shift pattern shown in the flyer. 203 is a full time case, that's why there's not 2wd. need a pic from the back __________________ time is inversely proportional to money; that's why it takes me so long 1967 K10 1967 Camaro

06-01-2009, 09:59 PM	#8
67ZL1 Registered User Join Date: Jul 2008 Location: Grande Prairie Alberta Posts: 59	Re: What transfre case do i have? From what i've read a 203 and 205 look alike. I was told the easiest way to tell is the idler shaft has a 3 bolt cover on the back of the t-case.

06-02-2009, 12:10 AM	#9
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Re: What transfre case do i have? what tranny in the truck? i am guessing an auto? since it has the 203 knob, i'm guessing 203. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

06-02-2009, 06:53 AM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: What transfre case do i have? You have a 203 if that`s the pattern you have and the same shifter.It`s full-time.Do your hubs have lock-outs?If they don`t,it`s still fulltime.If it has lock-out hubs,it has been converted(good idea).They operate off a drive chain rather than all gear.The chain can stretch and need replaced. __________________ "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 ~

06-02-2009, 07:53 AM	#12
Dooley Registered User Join Date: Mar 2005 Location: North Coast Posts: 1,012	Re: What transfre case do i have? In stock form a 1979 with automatic transmission will have a 203 transfer case. Being a 1979 it will have the updated chain/gears which started part way through the 1978 model year. The chain is narrower and the gears have a much steeper pitch to eliminate slippage when showing some wear. GM squarebodies did not use the 205 with the automatic transmission until the 1980 model year,(all models got the 205 in 1980). GM used the 205's in 1 ton K/V models through 1991).

06-03-2009, 07:22 AM	#15
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: What transfre case do i have? Full-time 4wd was an option.An automatic truck could have the 205 and lockouts. __________________ "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 ~



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