T case adaptor question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Class of 69 · 06-03-2003, 10:00 PM

I have an SM465 married to a T221. I picked up a 71-2 chassis witha 3 speed married to an NP205. Will the adaptor for the 205 bolt to my SM465??

Blazer1970 · 06-04-2003, 08:03 AM

No

**Yukon Jack** · 06-04-2003, 04:24 PM

But luckily it will be easier to find the proper adapter than if you were trying to find one for the Rockwell. Also, I wouldn't bother swapping out the Rockwell unless you are having problems. They are basically equal strenght and same gear ratio. Plus, it's kind of fun to have something different.

Class of 69 · 06-04-2003, 07:10 PM

So I need the adaptor for the SM465 to NP 205 ??

**jerry moss** · 06-04-2003, 09:53 PM

you'll need the adapter for the 465/205,coupling sleeve and crossmember. the crossmember for the rockwell is shorter, you can make spacers to go between the frame and crossmember but if you want it correct you need a 205 crossmember. you'll also need new driveshafts and another hole in the hump for the shifter. i did the swap on a 69 short bed i used to have.

Class of 69 · 06-04-2003, 10:53 PM

Thanks, Jerry. I got the driveshafts with the chassis, and the crossmember, but it's completely rotted out under the mounts. I knew about the shifter being on the opposite side, and forgot to get the hump with the chassis! So I need the adaptor, coupling sleeve,and a good crossmember. I'll have to post a "wanted" on the parts board. Thanks

06-03-2003, 10:00 PM	#1
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	T case adaptor question I have an SM465 married to a T221. I picked up a 71-2 chassis witha 3 speed married to an NP205. Will the adaptor for the 205 bolt to my SM465?? __________________ 69 GMC K10 ..some restoration required....still..

06-04-2003, 08:03 AM	#2
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,507	No __________________ Tim

06-04-2003, 04:24 PM	#3
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,689	But luckily it will be easier to find the proper adapter than if you were trying to find one for the Rockwell. Also, I wouldn't bother swapping out the Rockwell unless you are having problems. They are basically equal strenght and same gear ratio. Plus, it's kind of fun to have something different. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

06-04-2003, 07:10 PM	#4
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	So I need the adaptor for the SM465 to NP 205 ?? __________________ 69 GMC K10 ..some restoration required....still..

06-04-2003, 09:53 PM	#5
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,959	you'll need the adapter for the 465/205,coupling sleeve and crossmember. the crossmember for the rockwell is shorter, you can make spacers to go between the frame and crossmember but if you want it correct you need a 205 crossmember. you'll also need new driveshafts and another hole in the hump for the shifter. i did the swap on a 69 short bed i used to have. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA

06-04-2003, 10:53 PM	#6
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	Thanks, Jerry. I got the driveshafts with the chassis, and the crossmember, but it's completely rotted out under the mounts. I knew about the shifter being on the opposite side, and forgot to get the hump with the chassis! So I need the adaptor, coupling sleeve,and a good crossmember. I'll have to post a "wanted" on the parts board. Thanks __________________ 69 GMC K10 ..some restoration required....still..



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