Transfer case id - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tim m · 07-13-2002, 10:41 AM

Can anyone help me ID my transfer case, it's in a 70 K10 there is a set of numbers on the case they are C99404 then a W underneath?

nu2-72 · 07-13-2002, 03:15 PM

An NP 205 will have a three bolt cover, center rear. The NP 203 was used 71-79. NP 205, 71-91. Np 208, 81 up. NP 241, 88 up. Early GM's used Dana 20. All info from Advance Adapters. What tranny ? Go to www.advanceadapters.com

Beast388 · 07-13-2002, 05:20 PM

I would say that it is a NP205. The number on mine is C-99404 with a A1Q underneath.

Rod · 07-13-2002, 10:35 PM

Pic of a 205 TC

fender · 07-13-2002, 10:42 PM

Quote:

Originally posted by nu2-72
An NP 205 will have a three bolt cover, center rear. The NP 203 was used 71-79. NP 205, 71-91. Np 208, 81 up. NP 241, 88 up. Early GM's used Dana 20. All info from Advance Adapters. What tranny ? Go to www.advanceadapters.com

NP 203 was used from 73-79
NP 205 was used from 70-91 I believe
The rest is correct

too many · 07-14-2002, 12:34 AM

When I was building my '80 1 ton 4x4 daully , I found a "quick" way to ID 203s & 205s. The shift handle on a 205 is round all the way thru floor. A 203 is rectangular . I was looking mainly at 70s and early 80s stuff. Any exceptions anyone knows of?

nu2-72 · 07-14-2002, 12:41 AM

Fender, as quoted, "all info from Advance Adapters." Those folks know more than I ever will.

**JIMs70GMC** · 07-14-2002, 08:43 PM

ford and dodge may have used NP203, but GM did not start until 1973 and the dana20 was only available in K5 w/ 6cyl and manual tranny.

nu2-72 · 07-14-2002, 08:50 PM

Interesting. The info from Adv. Adapters is listed just for GM/GMC trucks and Blazers.
What I should have said was that those people and many on this board know more than I ever will. Still learning.

07-13-2002, 10:41 AM	#1
tim m Registered User Join Date: Mar 2001 Location: Gilbert Az Posts: 286	Transfer case id Can anyone help me ID my transfer case, it's in a 70 K10 there is a set of numbers on the case they are C99404 then a W underneath? __________________ 1970 k10 1971 C10 Gilbert Az

07-13-2002, 03:15 PM	#2
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	An NP 205 will have a three bolt cover, center rear. The NP 203 was used 71-79. NP 205, 71-91. Np 208, 81 up. NP 241, 88 up. Early GM's used Dana 20. All info from Advance Adapters. What tranny ? Go to www.advanceadapters.com __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

07-13-2002, 05:20 PM	#3
Beast388 Suburbans RULE! Join Date: Jan 2000 Location: Clinton, IA 52732 Posts: 689	I would say that it is a NP205. The number on mine is C-99404 with a A1Q underneath. __________________ --Ben 71 GMC Suburban 4X4 The "Beast" 388 CID Stroker, TH350, NP205, 8-lug D44, 14BFF w/ Detroit, 4.10:1 gears, 4-Wheel Disks 4" Lift, 35" MT/R's.

07-13-2002, 10:35 PM	#4
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Pic of a 205 TC Attached Images __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

07-14-2002, 12:34 AM	#6
too many Registered User Join Date: Jul 2001 Location: nw IL Posts: 211	Top-side ID When I was building my '80 1 ton 4x4 daully , I found a "quick" way to ID 203s & 205s. The shift handle on a 205 is round all the way thru floor. A 203 is rectangular . I was looking mainly at 70s and early 80s stuff. Any exceptions anyone knows of?

07-14-2002, 12:41 AM	#7
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Fender, as quoted, "all info from Advance Adapters." Those folks know more than I ever will. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

07-14-2002, 08:43 PM	#8
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	ford and dodge may have used NP203, but GM did not start until 1973 and the dana20 was only available in K5 w/ 6cyl and manual tranny. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-14-2002, 08:50 PM	#9
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Interesting. The info from Adv. Adapters is listed just for GM/GMC trucks and Blazers. What I should have said was that those people and many on this board know more than I ever will. Still learning. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

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