which 205 to use? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Phuloi68** · 07-06-2004, 07:47 AM

I am trying to figure which 205 transfer case to use. I have one with a rear slip yoke output and one with a rear fixed yoke output. The frame is a long bed with a 350 sbc and a 350 trans. I will be doing some snowplowing and pulling a trailer sometimes but mainly just everyday driving. It will have a one piece driveshaft. Any advice?
Also, does anyone have the measurements of the driveshafts?

75-K5 · 07-06-2004, 09:42 AM

Use the fixed yoke. I wasn't aware there was even a slip yoke 205, I thought only 208's came in slip yoke varieties. Either way, go with the fixed yoke as long as you have a slip shaft.

**JIMs70GMC** · 07-06-2004, 11:07 AM

I'd say go with the fixed yoke. The slip yoke variety was a one year only in 1980 I believe. With the fixed yoke if you ever had to drive w/ the rear driveshaft removed you will not leak gear oil all over the place. Also I believe the tail shaft of the slip-yoke 205 is aluminum.

1969 GMC · 07-06-2004, 10:52 PM

I would agree with the others...use the fixed yoke version. I also have 2x NP205s and had to choose which one to use (one 1970 model and one 1980 model). 1980 was an interesting year for GM trucks because all 4x4 models used the NP205 regardless of what engine or transmission, BUT all were slip yoke. The slip yoke may have been used later too, but I am not sure. What made the decision simple for me was that the '70 used a front driveshaft yoke, while the '80 uses a flange, and I didn't want any unnecessary driveshaft work since my old Rockwell T221 also had a front yoke. Also, that aluminum tail cone is really big...I would have had to shorten the rear driveshaft alot. Here is a crappy pic of it, but you get the idea:

6869704X4 · 07-17-2004, 03:23 PM

Use the slip yoke.

And sell me the fixed. hehe

07-06-2004, 07:47 AM	#1
Phuloi68 Senior Member Join Date: Dec 2003 Location: Valparaiso, In Posts: 1,114	which 205 to use? I am trying to figure which 205 transfer case to use. I have one with a rear slip yoke output and one with a rear fixed yoke output. The frame is a long bed with a 350 sbc and a 350 trans. I will be doing some snowplowing and pulling a trailer sometimes but mainly just everyday driving. It will have a one piece driveshaft. Any advice? Also, does anyone have the measurements of the driveshafts? __________________ Phuloi68 Indy survivor Norwood survivor Big Sandy survivor for those who fight for it... F R E E D O M has a price the protected will never know. Last edited by Phuloi68; 07-06-2004 at 08:20 AM.

07-06-2004, 09:42 AM	#2
75-K5 Bucket of Bolts Join Date: Dec 2003 Location: Anderson, Indiana Posts: 455	Use the fixed yoke. I wasn't aware there was even a slip yoke 205, I thought only 208's came in slip yoke varieties. Either way, go with the fixed yoke as long as you have a slip shaft. __________________ This is the project that never ends, yes it goes on and on my friend....

07-06-2004, 11:07 AM	#3
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	I'd say go with the fixed yoke. The slip yoke variety was a one year only in 1980 I believe. With the fixed yoke if you ever had to drive w/ the rear driveshaft removed you will not leak gear oil all over the place. Also I believe the tail shaft of the slip-yoke 205 is aluminum. __________________ 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

07-06-2004, 10:52 PM	#4
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	I would agree with the others...use the fixed yoke version. I also have 2x NP205s and had to choose which one to use (one 1970 model and one 1980 model). 1980 was an interesting year for GM trucks because all 4x4 models used the NP205 regardless of what engine or transmission, BUT all were slip yoke. The slip yoke may have been used later too, but I am not sure. What made the decision simple for me was that the '70 used a front driveshaft yoke, while the '80 uses a flange, and I didn't want any unnecessary driveshaft work since my old Rockwell T221 also had a front yoke. Also, that aluminum tail cone is really big...I would have had to shorten the rear driveshaft alot. Here is a crappy pic of it, but you get the idea: __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

07-17-2004, 03:23 PM	#5
6869704X4 Registered User Join Date: Jul 2002 Location: SE NM Posts: 769	Use the slip yoke. And sell me the fixed. hehe __________________ The more I learn about women, the more I love my truck.



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