help ID some #'s please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Drobny · 05-12-2006, 12:44 PM

i got a 1970 GMC 1/2ton SWB 4x4 w/ 292,3 on the tree i don't have anyway of posting pics, so i'll describe.

transfercase #
C-98404
A1N
Rearend 12 bolt the #'s are upside down and are on the passenger side.
12846
97880

plaese help i've had the same thing posted in drivtrain but no one could help.

my hayes book donesn't say anything and the aoutparts stores just scratch their heads.
Pat

GM72K10 · 05-29-2006, 07:56 AM

Only ever had one 4x4 with a 3 speed. Is the trans a Muncie or a saginaw? Transfer case could be a New Process or a Rockwell, probably a New Process.
Good Luck.

**special-K** · 05-29-2006, 12:07 PM

Or a Dana Model 20.I don`t know if they were used before`71.But,that`s what goes behind 3spds in lighter applications.This would be the same t-case used in some Jeeps & Scouts.It`s noticeable smaller than the Rockwell & NP205.

Robert1970C20rstbukt · 06-22-2006, 09:58 AM

The transfer case is probably the Dana 20. The GM parts book lists the NP205 as NP98981, and the part # is 3974294.

05-12-2006, 12:44 PM	#1
Drobny Hunting is Life Join Date: Jun 2005 Location: Buffalo,MN Posts: 115	help ID some #'s please i got a 1970 GMC 1/2ton SWB 4x4 w/ 292,3 on the tree i don't have anyway of posting pics, so i'll describe. transfercase # C-98404 A1N Rearend 12 bolt the #'s are upside down and are on the passenger side. 12846 97880 plaese help i've had the same thing posted in drivtrain but no one could help. my hayes book donesn't say anything and the aoutparts stores just scratch their heads. Pat

05-29-2006, 07:56 AM	#2
GM72K10 Next! Join Date: Jan 2003 Location: Eastern Pa. Posts: 2,483	Re: help ID some #'s please Only ever had one 4x4 with a 3 speed. Is the trans a Muncie or a saginaw? Transfer case could be a New Process or a Rockwell, probably a New Process. Good Luck. __________________ 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

05-29-2006, 12:07 PM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: help ID some #'s please Or a Dana Model 20.I don`t know if they were used before`71.But,that`s what goes behind 3spds in lighter applications.This would be the same t-case used in some Jeeps & Scouts.It`s noticeable smaller than the Rockwell & NP205. __________________ "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 ~

06-22-2006, 09:58 AM	#4
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	Re: help ID some #'s please The transfer case is probably the Dana 20. The GM parts book lists the NP205 as NP98981, and the part # is 3974294. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck



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