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#76 |
Registered User
![]() Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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Wow, interesting thread.
In addition to the very important 'critical speed' issue is the ability to work around this speed....of which they are indeed ways. For instance, if you went with a (less desireable) solid steel shaft you would very quickly find you couldn't rotate it as fast as you could a larger diameter hollow shaft due to its concentrated (central) mass wanting to initially bend at both rest conditions and at higher speeds.....and definitely quicker to approach this condition than the hollow one. That is why you find most (all?) driveshafts, that are subject to high speeds, made of a hollow (larger diameter) tube material that is inherently stiffer over its length than a solid steel smaller diameter shaft over the same length. Thus a great result of this is the ability for a large diameter tube to successfully deliver torque with a minimal amount of axial twist relative to its length....nice to have. A lot of folks would really be surprised to see just how thin the material on a high hp driveshaft, or any typical driveshaft is....lol. Its actually, physically a fairly light part relative to its length and this is achieved by increasing the diameter which keeps it stiff while allowing excellent torque transmission characteristics. If you want to have some fun....make a driveshaft out of solid 1-1/4"ø steel and wind up the vehicle on a hoist to say....4500 rpm, and watch the driveshaft....(from behind a screen or shield)...lol. Interesting discussion....lets keep it going! All Good Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 Last edited by Coley; 07-13-2016 at 07:26 PM. |
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#77 |
Registered User
![]() Join Date: Jan 2015
Location: Waverly iowa
Posts: 4
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Re: Why a 2 piece driveshaft?
I was told by Sadler Powertrain to install yoke into transmission until it bottoms out, measure from center of yoke holes to center of rear housing yoke holes then subtract 1 1/4" for proper clearance.
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#78 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,284
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Re: Why a 2 piece driveshaft?
This IS the correct way to do it.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#79 | |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,284
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Re: Why a 2 piece driveshaft?
Quote:
Look on the other side of the crossmember. Can you see where the washers/nuts/bolts were on that side? I don't know how these mount up as I have never had one with a 2-pc shaft. I do know that my 70 came with a 250/3OTT from the factory, coil springs, one-piece driveshaft. I put a 402/TH400 in it and had a local driveline shop shorten and balance it, put new u-joints on it, and I have had it up to 100 mph - smooth as silk.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#80 | |
Senior Member
![]() Join Date: Oct 2013
Location: Santa Paula, CA
Posts: 600
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Re: Why a 2 piece driveshaft?
Quote:
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