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

chicogixr · 04-22-2004, 11:14 PM

i have a 79 K10 and i want to know how to tell what transfer case i have. i dont want anyone to tell me what i should have or what i might have. tell me how to prove it. what do i need to look for? does anyone have pictures so i can see? thanks.

Destructo · 04-22-2004, 11:29 PM

Should be a NP203, but the way to find out is to look at the metal plate which is riveted on the back side of the case, its a round metal tag with a rivet in the middle and it has little red border around it, the model will be stamped in into that plate, should say New Process and then 3 numbers, I suspect the 3 numbers will be 203.

1969 GMC · 04-23-2004, 12:29 AM

that tag may not be there, but an easy way to check is to look at your transfer case shift knob (if that is there, lol). if it says something like "Hi, Hi Lock, Lo, Lo Lock" then its a NP203 (fulltime 4x4). if it says "2 Hi 4 Hi N 4 Lo" then you have the NP205 part-time case. of the 2, the NP205 is better, but the NP203 is more commong and it isn't that bad.

ryanroo · 04-23-2004, 08:46 AM

if its all factory, then with a 4 speed its a 205 with an auto should be 203. look between the rear output and the bottom aluminum coverplate(round with 6 bolts holding it on) if there is a little circle of metal about 2.5 inches in diam. held on by three bolts, its a 205, if not a 203
Ryan

04-22-2004, 11:14 PM	#1
chicogixr Registered User Join Date: Jan 2004 Location: chico,ca Posts: 52	what transfer case do i have? i have a 79 K10 and i want to know how to tell what transfer case i have. i dont want anyone to tell me what i should have or what i might have. tell me how to prove it. what do i need to look for? does anyone have pictures so i can see? thanks. __________________ Semper Fi seafoam green 79 K10 stepside with a 6" lift, 33" baja claws, billet interior, autometer gauges, 350/t350

04-22-2004, 11:29 PM	#2
Destructo Registered User Join Date: Sep 2003 Location: Lewisville, NC Posts: 1,836	Should be a NP203, but the way to find out is to look at the metal plate which is riveted on the back side of the case, its a round metal tag with a rivet in the middle and it has little red border around it, the model will be stamped in into that plate, should say New Process and then 3 numbers, I suspect the 3 numbers will be 203. __________________ 1985 Scottsdale Shortbed 4x4 Stout 350 with some "upgrades"-700r4-33x12.5" Mud Tires, Warn 8274-50 winch. 2005 Chevrolet Colorado Regular Cab 2wd 4-banger, 5 speed, Street Pack with 3.73 axle.

04-23-2004, 12:29 AM	#3
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	that tag may not be there, but an easy way to check is to look at your transfer case shift knob (if that is there, lol). if it says something like "Hi, Hi Lock, Lo, Lo Lock" then its a NP203 (fulltime 4x4). if it says "2 Hi 4 Hi N 4 Lo" then you have the NP205 part-time case. of the 2, the NP205 is better, but the NP203 is more commong and it isn't that bad. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

04-23-2004, 08:46 AM	#4
ryanroo Senior Member Join Date: Apr 2004 Location: sw colorado Posts: 2,720	if its all factory, then with a 4 speed its a 205 with an auto should be 203. look between the rear output and the bottom aluminum coverplate(round with 6 bolts holding it on) if there is a little circle of metal about 2.5 inches in diam. held on by three bolts, its a 205, if not a 203 Ryan __________________ 72 K20 12v build 72 K20 "parts truck" A place for your diesel swap questions



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