Question on driveshaft slip yoke clearance.. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68gmsee · 01-13-2008, 01:36 PM

I'm going to get a crate motor for my 69 Chevy (350/350) and was wondering how much clearance is needed from the back of the transmission to the end of the slip yoke for in and out movement...

The slip yoke has about 2-1/2 inches or more of exposed metal and it seems to me that it is barely catching the back of the output shaft. I'm thinking of sliding the motor back about an 1-1/2 in. and that would bgive me about 1 inch of in and out movement.

Thanks.

JimKshortstep4x4 · 01-13-2008, 02:27 PM

We set the 4x4 slip joints at 3/4 to 1"
so I think 1" would be good. I don't know how much up and down travel you have on your truck but the shaft does not move in and out that much on trucks with the stock springs.

Jim

68gmsee · 01-13-2008, 03:19 PM

That's what I needed, Jim. Other than the 350/350 conversion, it is a stock truck. Thanks for response.

01-13-2008, 01:36 PM	#1
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Question on driveshaft slip yoke clearance.. I'm going to get a crate motor for my 69 Chevy (350/350) and was wondering how much clearance is needed from the back of the transmission to the end of the slip yoke for in and out movement... The slip yoke has about 2-1/2 inches or more of exposed metal and it seems to me that it is barely catching the back of the output shaft. I'm thinking of sliding the motor back about an 1-1/2 in. and that would bgive me about 1 inch of in and out movement. Thanks.

01-13-2008, 02:27 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Question on driveshaft slip yoke clearance.. We set the 4x4 slip joints at 3/4 to 1" so I think 1" would be good. I don't know how much up and down travel you have on your truck but the shaft does not move in and out that much on trucks with the stock springs. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC Last edited by JimKshortstep4x4; 01-13-2008 at 02:28 PM. Reason: Reword

01-13-2008, 03:19 PM	#3
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Question on driveshaft slip yoke clearance.. That's what I needed, Jim. Other than the 350/350 conversion, it is a stock truck. Thanks for response.



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