Dana 20 X-fer case - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Davy · 03-21-2005, 04:41 PM

Hey, I don't see much talk about the Dana 20. I have one in my 70 Blazer. What's wrong with it?

Thanks,
Davy

**JIMs70GMC** · 03-21-2005, 09:03 PM

Nothing really, you must have an I6. I had a dana20 in an old scout II I had. It's gear driven, just not as strong as the NP205.

Americanrider · 03-21-2005, 09:53 PM

Check this out:

http://www.pirate4x4.com/tech/billav...-20/index.html

Davy · 03-22-2005, 10:19 AM

Cool Link.

Actually, I have a 350ci. Originally equiped. Strange, eh?

I was always planning to convert to a TH350 and NP205 since they were also options in 70 Blazers.....but now I might just leave the 4 speed and D20.

Davy

**JIMs70GMC** · 03-22-2005, 10:25 AM

Hmm... I thought the dana20s only came behind I6 w/ 3spd manual. Which 4spd do you have?

Davy · 03-22-2005, 10:31 AM

Jim, I thought the same thing when I bought the Blazer, but the glove box says 350ci and 4 speed.

Very strange.

**Yukon Jack** · 03-22-2005, 11:18 AM

My 70 K5 also had a 350 in it with a 4 speed and supposedly a Dana 20. It was gone when I got the K5 but the transfer case crossmember confirms it was a Dana 20 in there.

Davy · 03-22-2005, 11:54 AM

Yukon,

Can you tell me how you knew from the crossmember? Are they different?

Thanks,
Davy

**Yukon Jack** · 03-23-2005, 11:15 AM

I swapped in an NP205 and found out the Dana 20 crossmember has to be dropped down about 1" to allow the NP205 to fit.

The NP205 crossmember puts the tc about 1" lower than the Dana 20 crossmember.

Davy · 03-23-2005, 11:20 AM

That's good to know, since I'm considering the same swap. I already have the NP205 and it's crossmember too.

Thanks again.

Jimmy Canuck · 03-26-2005, 04:30 AM

I have a Dana 20 in my 1970 Jimmy. It also has a 350 and a 4 speed.
Thinking about swapping in a 205, thanks for the heads up.

03-21-2005, 04:41 PM	#1
Davy Registered User Join Date: Apr 2003 Location: Rice, Minnesota Posts: 370	Dana 20 X-fer case Hey, I don't see much talk about the Dana 20. I have one in my 70 Blazer. What's wrong with it? Thanks, Davy __________________ 1970 Blazer CST Looking for NOS items for my CST restoration.

03-21-2005, 09:03 PM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Nothing really, you must have an I6. I had a dana20 in an old scout II I had. It's gear driven, just not as strong as the NP205. __________________ 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

03-21-2005, 09:53 PM	#3
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Dana 20 upgrades Check this out: http://www.pirate4x4.com/tech/billav...-20/index.html

03-22-2005, 10:19 AM	#4
Davy Registered User Join Date: Apr 2003 Location: Rice, Minnesota Posts: 370	Cool Link. Actually, I have a 350ci. Originally equiped. Strange, eh? I was always planning to convert to a TH350 and NP205 since they were also options in 70 Blazers.....but now I might just leave the 4 speed and D20. Davy __________________ 1970 Blazer CST Looking for NOS items for my CST restoration.

03-22-2005, 10:25 AM	#5
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Hmm... I thought the dana20s only came behind I6 w/ 3spd manual. Which 4spd do you have? __________________ 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

03-22-2005, 10:31 AM	#6
Davy Registered User Join Date: Apr 2003 Location: Rice, Minnesota Posts: 370	Jim, I thought the same thing when I bought the Blazer, but the glove box says 350ci and 4 speed. Very strange. Attached Images __________________ 1970 Blazer CST Looking for NOS items for my CST restoration.

03-22-2005, 11:18 AM	#7
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	My 70 K5 also had a 350 in it with a 4 speed and supposedly a Dana 20. It was gone when I got the K5 but the transfer case crossmember confirms it was a Dana 20 in there. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

03-22-2005, 11:54 AM	#8
Davy Registered User Join Date: Apr 2003 Location: Rice, Minnesota Posts: 370	Yukon, Can you tell me how you knew from the crossmember? Are they different? Thanks, Davy __________________ 1970 Blazer CST Looking for NOS items for my CST restoration.

03-23-2005, 11:15 AM	#9
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	I swapped in an NP205 and found out the Dana 20 crossmember has to be dropped down about 1" to allow the NP205 to fit. The NP205 crossmember puts the tc about 1" lower than the Dana 20 crossmember. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

03-23-2005, 11:20 AM	#10
Davy Registered User Join Date: Apr 2003 Location: Rice, Minnesota Posts: 370	That's good to know, since I'm considering the same swap. I already have the NP205 and it's crossmember too. Thanks again. __________________ 1970 Blazer CST Looking for NOS items for my CST restoration.

03-26-2005, 04:30 AM	#11
Jimmy Canuck Registered User Join Date: Jan 2005 Location: British Columbia, Canada Posts: 19	I have a Dana 20 in my 1970 Jimmy. It also has a 350 and a 4 speed. Thinking about swapping in a 205, thanks for the heads up.



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