NP 241 to SM 465????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jkade · 03-12-2007, 08:46 PM

The suburban has a 241 and a 700r4. Can I make the 241 work with my 4 speed???

rcbildr · 03-13-2007, 04:07 AM

The 700R4 has a 27spline output and the SM-465's have either a 10 spline, or a 32 spline output. Assuming you have the 32 spline SM-465, you would have to replace the input gear on the NP-241. I've done the swap on an NP-208 and it's pretty easy to do, not sure about the NP-241 tho. Hope this helps.

Jonboy · 03-13-2007, 10:01 AM

What are the main differences between a 208 and 241? I know that the 241 has the provisions for the electric VSS, but what else is different? They look the same.

rcbildr · 03-13-2007, 12:02 PM

Somebody correct me if I'm wrong, but I think the NP-241 has a lower gear ratio, is a little stronger, and there is a slip-yoke eliminator kit available where there isn't one available for the 208. IIRC you can adapt part of the NP-241 to the 208 to use the slip-yoke eliminator kit, but I'm not 100% sure on that.

Russell · 03-13-2007, 01:14 PM

Yep, get a 32 spline SM465, with a 208 adapter and bolt the NP241 straight up. The 241 is lighter, and quite a bit stronger than a 208 is

jkade · 03-13-2007, 08:09 PM

Quote:

Originally Posted by Russell

Yep, get a 32 spline SM465, with a 208 adapter and bolt the NP241 straight up. The 241 is lighter, and quite a bit stronger than a 208 is

I have a 208 on the 465 right now, should the 241 bolt up then? I am going to keep the 241 for a spare.
Thanks

Russell · 03-13-2007, 08:44 PM

Yep, SM465 / NP208 combos are all 32 spline, so assuming you have a 32 spline NP241, it will literally bolt directly to the NP208 adapter.

03-12-2007, 08:46 PM	#1
jkade Senior Member Join Date: Nov 2005 Location: AL Posts: 2,517	NP 241 to SM 465????? The suburban has a 241 and a 700r4. Can I make the 241 work with my 4 speed???

03-13-2007, 04:07 AM	#2
rcbildr Registered User Join Date: Sep 2000 Location: Gold Bar, WA Posts: 1,216	Re: NP 241 to SM 465????? The 700R4 has a 27spline output and the SM-465's have either a 10 spline, or a 32 spline output. Assuming you have the 32 spline SM-465, you would have to replace the input gear on the NP-241. I've done the swap on an NP-208 and it's pretty easy to do, not sure about the NP-241 tho. Hope this helps. __________________ My Projects: 1960 GMC 1/2ton with 305 V6 (daily driver) 1963 Chevy 1/2ton 2wd...converting to 4x4 1967 Suburban 1/2ton 2wd My Girlfriends Projects 1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver) 1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam 1978 Camaro Z28 Last edited by rcbildr; 03-13-2007 at 04:07 AM.

03-13-2007, 10:01 AM	#3
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: NP 241 to SM 465????? What are the main differences between a 208 and 241? I know that the 241 has the provisions for the electric VSS, but what else is different? They look the same.

03-13-2007, 12:02 PM	#4
rcbildr Registered User Join Date: Sep 2000 Location: Gold Bar, WA Posts: 1,216	Re: NP 241 to SM 465????? Somebody correct me if I'm wrong, but I think the NP-241 has a lower gear ratio, is a little stronger, and there is a slip-yoke eliminator kit available where there isn't one available for the 208. IIRC you can adapt part of the NP-241 to the 208 to use the slip-yoke eliminator kit, but I'm not 100% sure on that. __________________ My Projects: 1960 GMC 1/2ton with 305 V6 (daily driver) 1963 Chevy 1/2ton 2wd...converting to 4x4 1967 Suburban 1/2ton 2wd My Girlfriends Projects 1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver) 1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam 1978 Camaro Z28

03-13-2007, 01:14 PM	#5
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Re: NP 241 to SM 465????? Yep, get a 32 spline SM465, with a 208 adapter and bolt the NP241 straight up. The 241 is lighter, and quite a bit stronger than a 208 is __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

03-13-2007, 08:44 PM	#7
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Re: NP 241 to SM 465????? Yep, SM465 / NP208 combos are all 32 spline, so assuming you have a 32 spline NP241, it will literally bolt directly to the NP208 adapter. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

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