identifying transfer case - The 1947 - Present Chevrolet & GMC Truck Message Board Network

blazerdog · 01-08-2006, 10:24 PM

How do I tell what kind of transfer case I have in my 72 blazer.PO said it was a newer model.

**kwmech** · 01-08-2006, 11:51 PM

Factory case in a 72 was a 205. Got a pic? or can you give a description.

**special-K** · 01-09-2006, 01:52 AM

If it`s a 3spd manual,the original t-case would be a Dana20.On the back of the case there should be an aluminum I.D.tag.Might have to do some cleaning.

RANDY COX · 01-09-2006, 07:59 PM

HHm makes me wonder if mine has been changed,it's currently 3spd with 205,my Dad's 71 gmc had the dana 20 and my ex 72 blazer had a dana 20 with 3spd setup.Gonna have to change the tranny soon somehow I messed up a sincronizer when replaceing the spacer between the tranny and transfercase

**special-K** · 01-09-2006, 10:41 PM

I don`t think all 3spds were backed by model 20s.Some came with 205s.I was thinking I could have worded that better this morning.

mrein3 · 01-13-2006, 09:16 AM

Quote:

Originally Posted by special-K

I don`t think all 3spds were backed by model 20s.Some came with 205s.I was thinking I could have worded that better this morning.

I know for a fact that not all 3-speed manuals were backed by the dana 20. I swapped out a 3-speed manual/NP205 for a th350/NP205 a couple of years ago.

My truck was a mutt when I got it but the chassis appeared to be all from the same truck. That truck was a 1971 3-speed manual with 4wd.

Blazer1970 · 01-13-2006, 06:47 PM

Quote:

Originally Posted by mrein3

I know for a fact that not all 3-speed manuals were backed by the dana 20. I swapped out a 3-speed manual/NP205 for a th350/NP205 a couple of years ago.

My truck was a mutt when I got it but the chassis appeared to be all from the same truck. That truck was a 1971 3-speed manual with 4wd.

See my post one up.

Blazer1970 · 01-10-2006, 08:11 AM

Dana 20s were only used in Blazers/Jimmys, not in pickups or Suburbans.

01-08-2006, 10:24 PM	#1
blazerdog Registered User Join Date: Dec 2005 Location: lindale, texas Posts: 98	identifying transfer case How do I tell what kind of transfer case I have in my 72 blazer.PO said it was a newer model.

01-08-2006, 11:51 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,466	Re: identifying transfer case Factory case in a 72 was a 205. Got a pic? or can you give a description.

01-09-2006, 01:52 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: identifying transfer case If it`s a 3spd manual,the original t-case would be a Dana20.On the back of the case there should be an aluminum I.D.tag.Might have to do some cleaning. __________________ "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 ~

01-09-2006, 07:59 PM	#4
RANDY COX Registered User Join Date: Mar 2001 Location: RADFORD, VA Posts: 2,651	Re: identifying transfer case HHm makes me wonder if mine has been changed,it's currently 3spd with 205,my Dad's 71 gmc had the dana 20 and my ex 72 blazer had a dana 20 with 3spd setup.Gonna have to change the tranny soon somehow I messed up a sincronizer when replaceing the spacer between the tranny and transfercase __________________ 1964 BBC 402 4x4

01-09-2006, 10:41 PM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: identifying transfer case I don`t think all 3spds were backed by model 20s.Some came with 205s.I was thinking I could have worded that better this morning. __________________ "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 ~

01-10-2006, 08:11 AM	#8
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: identifying transfer case Dana 20s were only used in Blazers/Jimmys, not in pickups or Suburbans. __________________ Tim



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