Spline number - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rsorrowjr · 03-07-2007, 07:59 PM

Is there a way to tell what spline my transfer case is without unbolting it? I have a 71 GMC 4x4 w/350 3spd on the column.

1969k10stepside · 03-07-2007, 08:18 PM

I think it should be 27 if its the orignal np205

CrashEd · 03-07-2007, 08:31 PM

I thought all manual tranns had 10 spline with a 205.The sm465 is a 10 spline with a 205 I know the newer stuff has changed from that.

1969k10stepside · 03-07-2007, 08:35 PM

Ed,the sm465 4spd is 10 spline,as rsorrowjr said,his with the auto would be 27.Here is something to look over:
205 Input Trans
10 spline male SM465 4 speed
27 spline male TH350 Auto
32 spline female, (short) TH400
32 spline female, (long) Later model 4 speed? (Not sure if these are still the SM465 and the "long" female input may have also been behind some TH400 transmissions? Not to familiar with the "long" input.

rsorrowjr · 03-07-2007, 08:48 PM

So it should be 27 for a 3spd manual?

mrein3 · 03-07-2007, 08:52 PM

Quote:

Originally Posted by rsorrowjr

So it should be 27 for a 3spd manual?

Nope. A 3-speed manual is a 10 spline too. I personally took one apart and it had 10 splines. It was a 1971 3-speed in front of a NP205.

rsorrowjr · 03-07-2007, 09:02 PM

Cool. Thanks for your help guys

03-07-2007, 07:59 PM	#1
rsorrowjr Junior Member Join Date: Oct 2006 Location: georgia Posts: 73	Spline number Is there a way to tell what spline my transfer case is without unbolting it? I have a 71 GMC 4x4 w/350 3spd on the column. __________________ 1971 GMC 4x4 SWB 1970 GMC LWB 2002 Mustang GT 2004 Honda VTX 1800c

03-07-2007, 08:18 PM	#2
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: Spline number I think it should be 27 if its the orignal np205 Last edited by 1969k10stepside; 03-07-2007 at 08:22 PM.

03-07-2007, 08:31 PM	#3
CrashEd 72 chevy Join Date: Jan 2007 Location: Central Il Posts: 725	Re: Spline number I thought all manual tranns had 10 spline with a 205.The sm465 is a 10 spline with a 205 I know the newer stuff has changed from that.

03-07-2007, 08:35 PM	#4
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: Spline number Ed,the sm465 4spd is 10 spline,as rsorrowjr said,his with the auto would be 27.Here is something to look over: 205 Input Trans 10 spline male SM465 4 speed 27 spline male TH350 Auto 32 spline female, (short) TH400 32 spline female, (long) Later model 4 speed? (Not sure if these are still the SM465 and the "long" female input may have also been behind some TH400 transmissions? Not to familiar with the "long" input. Last edited by 1969k10stepside; 03-07-2007 at 08:35 PM.

03-07-2007, 08:48 PM	#5
rsorrowjr Junior Member Join Date: Oct 2006 Location: georgia Posts: 73	Re: Spline number So it should be 27 for a 3spd manual? __________________ 1971 GMC 4x4 SWB 1970 GMC LWB 2002 Mustang GT 2004 Honda VTX 1800c

03-07-2007, 09:02 PM	#7
rsorrowjr Junior Member Join Date: Oct 2006 Location: georgia Posts: 73	Re: Spline number Cool. Thanks for your help guys __________________ 1971 GMC 4x4 SWB 1970 GMC LWB 2002 Mustang GT 2004 Honda VTX 1800c



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