700R4/np205 setup - The 1947 - Present Chevrolet & GMC Truck Message Board Network

6T8 · 07-10-2007, 10:18 AM

Trying to get all info on putting a np205 behind a 700r4

I have read that you have to either change output shaft on tran or shorten it by 3/4". Use an adapter for th350 then good to go

Anyone have more info? Thanks in advance.........Rick

6T8 · 07-10-2007, 12:43 PM

Got the adapter, obviously the above information was wrong. Anyone have the right scoop on this change? Thanks.........Rick

6T8 · 07-10-2007, 04:44 PM

Looks like I'll have to go with advance adapters unless someone comes up with better idea.........thanks......Rick

snj8198 · 07-10-2007, 05:07 PM

try the search on this site. this topic has been coming up every few weeks here lately. good luck. -steve

Musclerodz · 07-10-2007, 07:46 PM

You can use the stock TH350 adapter, but you have to run a shortened output shaft in the tranny or build a spacer to take up the difference.

Mike

6T8 · 07-10-2007, 08:15 PM

Thanks for info. Advance adapter has shortened out put shaft. I have th350 adapter but the np 205 was out of 4-speed. AA also has coupler to go to 10 spline goes inside th350 adapter. That setup is $276. It's $172.50 just for the output shaft. I don't think I could find input for 205 27 spline for less than that. Plus I would have to swap out. Let you know. By the way my truck is '70 K10 shortbed fleetside.Fac AC PS 6cyl ........Rick

**CUSTOM/10** · 07-11-2007, 09:17 AM

If you go all gm parts you'll need an adapter from a TH350, the input shaft for a np205 that was set-up for a TH350 and the short trany out put shaft from AA. or find a complete NP205 that is from a TH350 set-up. ( 27 spline )

Gary

Musclerodz · 07-11-2007, 11:51 AM

I have a 27 spline input i just pulled from my 205 for a 32 spline if you need it.

Mike

07-10-2007, 10:18 AM	#1
6T8 Active Member Join Date: Dec 2004 Location: Tucson, AZ Posts: 233	700R4/np205 setup Trying to get all info on putting a np205 behind a 700r4 I have read that you have to either change output shaft on tran or shorten it by 3/4". Use an adapter for th350 then good to go Anyone have more info? Thanks in advance.........Rick

07-10-2007, 12:43 PM	#2
6T8 Active Member Join Date: Dec 2004 Location: Tucson, AZ Posts: 233	Re: 700R4/np205 setup Got the adapter, obviously the above information was wrong. Anyone have the right scoop on this change? Thanks.........Rick

07-10-2007, 04:44 PM	#3
6T8 Active Member Join Date: Dec 2004 Location: Tucson, AZ Posts: 233	Re: 700R4/np205 setup Looks like I'll have to go with advance adapters unless someone comes up with better idea.........thanks......Rick

07-10-2007, 05:07 PM	#4
snj8198 Registered User Join Date: Feb 2007 Location: Star Valley, WY Posts: 2,038	Re: 700R4/np205 setup try the search on this site. this topic has been coming up every few weeks here lately. good luck. -steve __________________ Steve 1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's

07-10-2007, 07:46 PM	#5
Musclerodz Senior Member Join Date: Aug 2005 Location: OKC, OK Posts: 2,365	Re: 700R4/np205 setup You can use the stock TH350 adapter, but you have to run a shortened output shaft in the tranny or build a spacer to take up the difference. Mike __________________ Mike Redpath

07-10-2007, 08:15 PM	#6
6T8 Active Member Join Date: Dec 2004 Location: Tucson, AZ Posts: 233	Re: 700R4/np205 setup Thanks for info. Advance adapter has shortened out put shaft. I have th350 adapter but the np 205 was out of 4-speed. AA also has coupler to go to 10 spline goes inside th350 adapter. That setup is $276. It's $172.50 just for the output shaft. I don't think I could find input for 205 27 spline for less than that. Plus I would have to swap out. Let you know. By the way my truck is '70 K10 shortbed fleetside.Fac AC PS 6cyl ........Rick

07-11-2007, 09:17 AM	#7
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,801	Re: 700R4/np205 setup If you go all gm parts you'll need an adapter from a TH350, the input shaft for a np205 that was set-up for a TH350 and the short trany out put shaft from AA. or find a complete NP205 that is from a TH350 set-up. ( 27 spline ) Gary __________________ Gary 72 SWB 4x4 My 72 SWB Build http://67-72chevytrucks.com/vboard/s...d.php?t=259859

07-11-2007, 11:51 AM	#8
Musclerodz Senior Member Join Date: Aug 2005 Location: OKC, OK Posts: 2,365	Re: 700R4/np205 setup I have a 27 spline input i just pulled from my 205 for a 32 spline if you need it. Mike __________________ Mike Redpath



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