np205 to TH350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

csb#356 · 11-10-2009, 02:21 AM

I have 74 chevy pickup and it had a np205 in it factory and it now has a 203 that doesn't work worth S**t. Anyways I want to put a 205 back in it and need to know what I would have to do. Obviously I need the transfer case, but can I use my old adaptor? Do I need different crossmembers? Any info would be appreciated.

OLDCHEV4X4 · 11-10-2009, 08:29 AM

Ya gotta have the adapter for the th350/NP205 combo. Dont know about the crossmember. If it used to have a 205, hopefully they used the old crossmember and made it fit the 203.

ghettoluxury · 11-10-2009, 01:08 PM

Cross member is the same. Along with the adapter for the 350 you will need the case with 27 splines not the 32 spline that is mated to the th400

csb#356 · 11-10-2009, 06:57 PM

I know to look for the 27 spline but the 205 that I took out had a double crossmember type a deal with one on the top frame rail and one on the bottom frame rail. If I remember right there's also a coupler sleever that you need to right?

donut · 11-10-2009, 10:32 PM

The coupler "should" be in the adapter.

Is this what you mean about a double crossmember type deal?

csb#356 · 11-11-2009, 01:33 AM

Thats exactly what I was talking about. Will my single crossmember work?

ghettoluxury · 11-11-2009, 11:32 PM

Quote:

Originally Posted by csb#356

Thats exactly what I was talking about. Will my single crossmember work?

yes

11-10-2009, 02:21 AM	#1
csb#356 Registered User Join Date: May 2009 Location: Pinehurst, Idaho Posts: 311	np205 to TH350 I have 74 chevy pickup and it had a np205 in it factory and it now has a 203 that doesn't work worth S**t. Anyways I want to put a 205 back in it and need to know what I would have to do. Obviously I need the transfer case, but can I use my old adaptor? Do I need different crossmembers? Any info would be appreciated.

11-10-2009, 08:29 AM	#2
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	Re: np205 to TH350 Ya gotta have the adapter for the th350/NP205 combo. Dont know about the crossmember. If it used to have a 205, hopefully they used the old crossmember and made it fit the 203. __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

11-10-2009, 06:57 PM	#4
csb#356 Registered User Join Date: May 2009 Location: Pinehurst, Idaho Posts: 311	Re: np205 to TH350 I know to look for the 27 spline but the 205 that I took out had a double crossmember type a deal with one on the top frame rail and one on the bottom frame rail. If I remember right there's also a coupler sleever that you need to right?

11-10-2009, 10:32 PM	#5
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: np205 to TH350 The coupler "should" be in the adapter. Is this what you mean about a double crossmember type deal? Attached Images __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

11-11-2009, 01:33 AM	#6
csb#356 Registered User Join Date: May 2009 Location: Pinehurst, Idaho Posts: 311	Re: np205 to TH350 Thats exactly what I was talking about. Will my single crossmember work?

11-10-2009, 01:08 PM	#3
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: np205 to TH350 Cross member is the same. Along with the adapter for the 350 you will need the case with 27 splines not the 32 spline that is mated to the th400 __________________ 1949 Five Window, 1973 Step Side, 2000 Z71



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