long bed one-piece drive shaft - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gramps77 · 10-06-2014, 02:09 PM

who has done the swap and is it ok for a daily driver? Just noticed my 2 piece original mount at the joint is worn and allowing it to sag a bit and wondering if I should just change it or go ahead and do a new driveshaft.
this is on a 77 2wd by the way. No big mods just used as a pickup

Keith Seymore · 10-06-2014, 02:47 PM

I always prefer a one piece.

If you have a shaft made your supplier can tell you what diameter and material would be best, based on your criteria.

Drive shaft critical speed - the point at which it bends and starts to swing like a jump rope - is a function of material, length and shaft rpm. Shaft rpm is a function of rear axle ratio, tire diameter and vehicle top speed.

K

79Betty · 10-06-2014, 02:59 PM

I had 1 made when i did my 4spd swap. With my old one turned in for a core it was 100 bucks.

xrcr · 10-06-2014, 04:22 PM

Too bad you don't live closer. I have your set up with a new carrier sitting on the floor. I went from a 4spd to an auto and used the shaft out of the donor. I had to change yolks and get a hybrid rear u joint but no slop or shimmy so far.

10-06-2014, 02:09 PM	#1
gramps77 Registered User Join Date: Oct 2011 Location: Plumas Lake, CA Posts: 386	long bed one-piece drive shaft who has done the swap and is it ok for a daily driver? Just noticed my 2 piece original mount at the joint is worn and allowing it to sag a bit and wondering if I should just change it or go ahead and do a new driveshaft. this is on a 77 2wd by the way. No big mods just used as a pickup

10-06-2014, 02:47 PM	#2
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: long bed one-piece drive shaft I always prefer a one piece. If you have a shaft made your supplier can tell you what diameter and material would be best, based on your criteria. Drive shaft critical speed - the point at which it bends and starts to swing like a jump rope - is a function of material, length and shaft rpm. Shaft rpm is a function of rear axle ratio, tire diameter and vehicle top speed. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

10-06-2014, 02:59 PM	#3
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: long bed one-piece drive shaft I had 1 made when i did my 4spd swap. With my old one turned in for a core it was 100 bucks. __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10

10-06-2014, 04:22 PM	#4
xrcr Registered User Join Date: Dec 2008 Location: Foristell, MO Posts: 418	Re: long bed one-piece drive shaft Too bad you don't live closer. I have your set up with a new carrier sitting on the floor. I went from a 4spd to an auto and used the shaft out of the donor. I had to change yolks and get a hybrid rear u joint but no slop or shimmy so far.



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