Why driveline angles are so important - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Marv D · 09-11-2014, 06:37 PM

Not news to many,, but this is a very COOL demonstration of what happens when the trans output shaft and differential input shaft are not perfectly parallel. Only makes sense that this HAS to cause serious traction problems.

Drive shaft velocity - YouTube

**PGSigns** · 09-11-2014, 08:04 PM

That is a good demo. Couple places in there it surely needed a CV joint.
Jimmy

Super73 · 09-12-2014, 01:21 AM

Definately a cool demo. Now the question.. how much pinion angle will get you in phase?

**PGSigns** · 09-12-2014, 07:16 AM

With a four link we ran them at zero in relation to the trans. We also set the drive line up to be as much of a straight line as we could. This in a drag car application presents the lowest amount of wasted energy in the drive line. In the old days with we would put a couple of degress down on the pinion so when the spring wrapped up and the traction bar pulled up tight the angle was as straight as we could get it.
Jimmy

hotrod 80 · 09-13-2014, 09:21 AM

[QUOTE=PGSigns;6839955]With a four link we ran them at zero in relation to the trans. We also set the drive line up to be as much of a straight line as we could. This in a drag car application presents the lowest amount of wasted energy in the drive line. In the old days with we would put a couple of degress down on the pinion so when the spring wrapped up and the traction bar pulled up tight the angle was as straight as we could get it.
Jimmy[/

I wnt through this with the Luv and just did it on the S-10 Added 2 degrees to theS-10 with slappers. Stll think it is off. Very cool demo .

BR3W CITY · 09-13-2014, 03:45 PM

+1 to this. We snapped a torque arm and sent our driveline angle somewhere between the moon and the pavement....

end results (pics coming soon) is most of the differential in the pan, and a lot of fixing to do.

JJLT1 · 09-13-2014, 05:28 PM

excellent movie Marv, 5 stars..

09-11-2014, 08:04 PM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Why driveline angles are so important That is a good demo. Couple places in there it surely needed a CV joint. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

09-12-2014, 01:21 AM	#3
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: Why driveline angles are so important Definately a cool demo. Now the question.. how much pinion angle will get you in phase? __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

09-12-2014, 07:16 AM	#4
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Why driveline angles are so important With a four link we ran them at zero in relation to the trans. We also set the drive line up to be as much of a straight line as we could. This in a drag car application presents the lowest amount of wasted energy in the drive line. In the old days with we would put a couple of degress down on the pinion so when the spring wrapped up and the traction bar pulled up tight the angle was as straight as we could get it. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

09-13-2014, 09:21 AM	#5
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: Why driveline angles are so important [QUOTE=PGSigns;6839955]With a four link we ran them at zero in relation to the trans. We also set the drive line up to be as much of a straight line as we could. This in a drag car application presents the lowest amount of wasted energy in the drive line. In the old days with we would put a couple of degress down on the pinion so when the spring wrapped up and the traction bar pulled up tight the angle was as straight as we could get it. Jimmy[/ I wnt through this with the Luv and just did it on the S-10 Added 2 degrees to theS-10 with slappers. Stll think it is off. Very cool demo . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

09-13-2014, 03:45 PM	#6
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Why driveline angles are so important +1 to this. We snapped a torque arm and sent our driveline angle somewhere between the moon and the pavement.... end results (pics coming soon) is most of the differential in the pan, and a lot of fixing to do. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-13-2014, 05:28 PM	#7
JJLT1 Registered User Join Date: Sep 2009 Location: South of HoustonTX. Posts: 148	Re: Why driveline angles are so important excellent movie Marv, 5 stars.. __________________ JJ 71 SWB 360 Th400 4.56



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