1 or 2 piece driveshaft and U Joint size ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RShaips · 05-31-2003, 08:14 AM

I am building a 67 shortbed with a powerglide automatic,I found a one piece driveshaft from another truck that will fit .My problem is the U Joints are bigger on the one piece than my two piece driveshaft.I have the yoke which fits into the tranny so all I need is the coupling on the rear end to be switched to one that will take the larger U Joint size. Any problems I may encounter with this swap ? And does anyone have the larger size coupling for the rear end that I can buy ? Thanks

RShaips · 05-31-2003, 03:27 PM

Looking thru my LMC catalog they only list a small U Joint 1 1/16 for the back on all trucks. They do list this size for the front of truck equipped with heavy duty transmission.I looked at a 4 x 4 and it also has the smaller U Joints. This driveshaft has 1 3/16 size holes for the U Joints, does anybody know what this may have come off ? I only need to switch the rear end connectipon to 1 3/16 to make this driveshaft work,anybody know where i can find one ? Thanks

sakohntr · 05-31-2003, 11:16 PM

They do make u-joints to fit multiple dimensions couplings. Like 2 different size caps. Just take both pieces to napa and they or a good driveline shop can match em up.

RShaips · 05-31-2003, 11:26 PM

Hey ,that was going to be my next question ! Thats an easy fix, hopefully I can find the right U Joint. Thanks

05-31-2003, 08:14 AM	#1
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	1 or 2 piece driveshaft and U Joint size ? I am building a 67 shortbed with a powerglide automatic,I found a one piece driveshaft from another truck that will fit .My problem is the U Joints are bigger on the one piece than my two piece driveshaft.I have the yoke which fits into the tranny so all I need is the coupling on the rear end to be switched to one that will take the larger U Joint size. Any problems I may encounter with this swap ? And does anyone have the larger size coupling for the rear end that I can buy ? Thanks

05-31-2003, 11:16 PM	#3
sakohntr Registered User Join Date: Mar 2002 Location: Floodwood Minnesota Posts: 1,057	u-joints They do make u-joints to fit multiple dimensions couplings. Like 2 different size caps. Just take both pieces to napa and they or a good driveline shop can match em up. __________________ 1967 K30 Napco 292/SM420 original paint 30k miles 1968 K60 Napco 396/5spd. dbl frame 52" michelins 1969 K10 SWB GMC 454/4spd 6" 35's posi,hooks 1972 C30 longhorn,BB/AT,A/C,Tilt,Toolbox,lokr 1987 K20 Chevrolet Suburban. 6" lift. 5.7L/TH400 1979 K60 GMC Coleman 4x4, 427/Allison.

05-31-2003, 03:27 PM	#2
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	Looking thru my LMC catalog they only list a small U Joint 1 1/16 for the back on all trucks. They do list this size for the front of truck equipped with heavy duty transmission.I looked at a 4 x 4 and it also has the smaller U Joints. This driveshaft has 1 3/16 size holes for the U Joints, does anybody know what this may have come off ? I only need to switch the rear end connectipon to 1 3/16 to make this driveshaft work,anybody know where i can find one ? Thanks

05-31-2003, 11:26 PM	#4
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	Hey ,that was going to be my next question ! Thats an easy fix, hopefully I can find the right U Joint. Thanks



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