4-speed differences - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jeremy_5 · 01-13-2005, 02:46 AM

Is there any differences between a sm-465 out of a 2 wheel drive truck opposed to one out of a 4x4?

ryanroo · 01-13-2005, 04:39 AM

yes, the output on a 4x4 model will have a short 10 spline(older models) output, or a longer 32? spline (newer models) and an 8 i think bolt pattern adapter mounting pattern for the TC adapter. the 4x2 models will have an output with a yoke on it for mounting to the driveshaft.
Ryan

Super Duck · 01-13-2005, 04:49 AM

the big difrance is the output shaft.

Jeremy_5 · 01-13-2005, 05:39 AM

Thanks guys.

When did it change from the short 10 spline to the longer 32?

1969 GMC · 01-13-2005, 05:50 AM

it changed to the long 32 spline the year the NP208 transfer case was introduced. '80 or '81, iirc. However this was only in the K10 and K20. The K30 kept the 10 spline til '85, when it got the long 32 spline, and a 32 spline NP205.

01-13-2005, 02:46 AM	#1
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	4-speed differences Is there any differences between a sm-465 out of a 2 wheel drive truck opposed to one out of a 4x4? __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20

01-13-2005, 04:39 AM	#2
ryanroo Senior Member Join Date: Apr 2004 Location: sw colorado Posts: 2,720	yes, the output on a 4x4 model will have a short 10 spline(older models) output, or a longer 32? spline (newer models) and an 8 i think bolt pattern adapter mounting pattern for the TC adapter. the 4x2 models will have an output with a yoke on it for mounting to the driveshaft. Ryan __________________ 72 K20 12v build 72 K20 "parts truck" A place for your diesel swap questions

01-13-2005, 04:49 AM	#3
Super Duck Chevy Nuttttt Join Date: Sep 2004 Location: Santa Maria Ca. Posts: 568	the big difrance is the output shaft. __________________ 67' Chev swb step side 69' SS elky 03' Chev ext cab 4X4 hey who lernt me to spell is there anything else?

01-13-2005, 05:39 AM	#4
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	Thanks guys. When did it change from the short 10 spline to the longer 32? __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20

01-13-2005, 05:50 AM	#5
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	it changed to the long 32 spline the year the NP208 transfer case was introduced. '80 or '81, iirc. However this was only in the K10 and K20. The K30 kept the 10 spline til '85, when it got the long 32 spline, and a 32 spline NP205. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650



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