swapping np205 for a 208 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

The Duke · 12-18-2005, 01:21 PM

Can anybody tell me whats involved with this? The 208 has a 27 spline input but looks to be about 2 in. longer than the 205. Trans is a th350. They both have a rear slide yoke. If the 208 will bolt on, do I just have to shorten the driveshaft? Thanks for any info

Truckstuff · 12-18-2005, 01:29 PM

Both T-Cases are 27 Spline, but the NP208 mates to a different style Turbo 350, with a different adapter.

The Turbo 350 for the NP205 is a short shaft
The Turbo 350 for the NP208 is a long shaft

The Duke · 12-18-2005, 01:33 PM

Forgot to mention the 208 came off a 700r4. sorry

**special-K** · 12-18-2005, 03:55 PM

Not sure why your doing this.Maybe a little more info on the vehicle and components you`re using would help.I`m assuming your vehicle has a TH350,TH400,or a manual 4spd.I see most people wanting to swap a 700r4 into a pre-o/d rig with a NP205 or they have a newer o/d equipped rig and want the tougher NP205 in place of the lighter newer t-cases.Give a little more info.

The Duke · 12-18-2005, 04:13 PM

OK, here's the deal. The truck I'm working on is a 80 1/2 ton with 350cid/turbo350/205tc. There is some nasty grinding noise when in 4high and hubs locked. I think its the transfer case. I have 700r4 and np208 from 84 blazer. Will the 208 fit on the turbo 350 or should I replace both units with the 700r4/208

**special-K** · 12-18-2005, 08:16 PM

That`s what I would do,use the 700r4.It would be easier than adapting and you`d get o/d.Try to isolate that noise first,though.

12-18-2005, 01:21 PM	#1
The Duke Registered User Join Date: Dec 2005 Location: Ohio Posts: 4	swapping np205 for a 208 Can anybody tell me whats involved with this? The 208 has a 27 spline input but looks to be about 2 in. longer than the 205. Trans is a th350. They both have a rear slide yoke. If the 208 will bolt on, do I just have to shorten the driveshaft? Thanks for any info

12-18-2005, 01:29 PM	#2
Truckstuff Registered User Join Date: Dec 2003 Location: Cloverdale, British Columbia Canada Posts: 159	Re: swapping np205 for a 208 Both T-Cases are 27 Spline, but the NP208 mates to a different style Turbo 350, with a different adapter. The Turbo 350 for the NP205 is a short shaft The Turbo 350 for the NP208 is a long shaft __________________ Real Trucks are Built not Bought Building: 1981 GM SB LowRider 1985 GM K3500 3+3 1981 GM K2500 SSB 1980 GM K2500 X-BC Hydro 1979 GM K3500 3+3 1976 GM K5 Blazer 1970 Custom 10 http://bc4x4.com/

12-18-2005, 01:33 PM	#3
The Duke Registered User Join Date: Dec 2005 Location: Ohio Posts: 4	Re: swapping np205 for a 208 Forgot to mention the 208 came off a 700r4. sorry

12-18-2005, 03:55 PM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: swapping np205 for a 208 Not sure why your doing this.Maybe a little more info on the vehicle and components you`re using would help.I`m assuming your vehicle has a TH350,TH400,or a manual 4spd.I see most people wanting to swap a 700r4 into a pre-o/d rig with a NP205 or they have a newer o/d equipped rig and want the tougher NP205 in place of the lighter newer t-cases.Give a little more info. __________________ "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 ~

12-18-2005, 04:13 PM	#5
The Duke Registered User Join Date: Dec 2005 Location: Ohio Posts: 4	Re: swapping np205 for a 208 OK, here's the deal. The truck I'm working on is a 80 1/2 ton with 350cid/turbo350/205tc. There is some nasty grinding noise when in 4high and hubs locked. I think its the transfer case. I have 700r4 and np208 from 84 blazer. Will the 208 fit on the turbo 350 or should I replace both units with the 700r4/208

12-18-2005, 08:16 PM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: swapping np205 for a 208 That`s what I would do,use the 700r4.It would be easier than adapting and you`d get o/d.Try to isolate that noise first,though. __________________ "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 ~



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