Pinion angle\2 piece driveline question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ItsRandy · 02-26-2011, 04:32 PM

I'm getting ready to set the pinion angel on my coil spring 69 1\2 ton long bed. I have information that you set the pinion angle just as you would if you were working on a single piece driveline (pinion 3* above horizontal, crank\out put shaft 3* below horizontal)...does anyone know, is this true? Location of the carrier bearing doesn't come into play?

bigsnookmaster · 02-26-2011, 08:54 PM

I know that's right for a single shaft. You might want to mock it up, and see how it looks, and go from there. Good luck.

crazy longhorn · 02-26-2011, 09:16 PM

The way it was explained to me, by a local driveline shop is thus....the front have of the shaft needs to be pretty much veiwed as an extension of the trans. The 1st U joint needs to have a 1/2 -1 degree working angle, & the last 2 joints are set up equal/opposite of each other. You wont get too much movement on a coil set (wrap up), but on a leaf spring truck, the springs wrap quite a bit, & do change the pinion angles on hard acceleration. what I have seen done on leaf setups for high perf /drag (1 pc shaft), is to set both angles 3 degrees down toward to ground. it will run smooth this way, & under full power, it will kick the pinion up around 6 degrees(still running 3 degrees on both ends). crazyL

**leddzepp** · 02-27-2011, 03:02 AM

How much have you lowered the truck from factory? I have a 5/6.5" drop on my SWB, with the factory 2 piece driveshaft. I did not need to correct the pinion angle, and no shims were needed.

Moved to suspension forum.

ItsRandy · 02-28-2011, 12:25 AM

Quote:

Originally Posted by leddzepp

How much have you lowered the truck from factory? I have a 5/6.5" drop on my SWB, with the factory 2 piece driveshaft. I did not need to correct the pinion angle, and no shims were needed.

Moved to suspension forum.

4\6 but installing 9" ford, I want to get it right.

**leddzepp** · 02-28-2011, 02:43 AM

Here is a thread with some very helpful info: http://67-72chevytrucks.com/vboard/s...d.php?t=397394

fixit-p · 02-28-2011, 02:45 PM

crazy longhorn is correct in that you want to set up the first u-joint to have ~1* true operating angle and the pinion centerline needs to be parallel with the centerline of drive shaft #1 and not the transmission. here are a couple more threads that address 2 piece drive lines. http://67-72chevytrucks.com/vboard/s...d.php?t=220466 http://67-72chevytrucks.com/vboard/s...d.php?t=405802

ItsRandy · 03-01-2011, 12:30 AM

Quote:

Originally Posted by fixit-p

crazy longhorn is correct in that you want to set up the first u-joint to have ~1* true operating angle and the pinion centerline needs to be parallel with the centerline of drive shaft #1 and not the transmission. here are a couple more threads that address 2 piece drive lines. http://67-72chevytrucks.com/vboard/s...d.php?t=220466 http://67-72chevytrucks.com/vboard/s...d.php?t=405802

Wow! Thanks for the information. Sounds like you have set-up a drive-line or two...or you are just REALLY smart! Thanks again.

fixit-p · 03-01-2011, 12:43 PM

Quote:

Originally Posted by ItsRandy

Wow! Thanks for the information. Sounds like you have set-up a drive-line or two...or you are just REALLY smart! Thanks again.

Nope, I just stayed at a Holiday Inn Express

02-26-2011, 08:54 PM	#2
bigsnookmaster Registered User Join Date: Jan 2008 Location: St.Petersburg,Fl Posts: 1,267	Re: Pinion angle\2 piece driveline question I know that's right for a single shaft. You might want to mock it up, and see how it looks, and go from there. Good luck. __________________ greg http://community.webshots.com/user/68406Stepside

02-26-2011, 09:16 PM	#3
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Re: Pinion angle\2 piece driveline question The way it was explained to me, by a local driveline shop is thus....the front have of the shaft needs to be pretty much veiwed as an extension of the trans. The 1st U joint needs to have a 1/2 -1 degree working angle, & the last 2 joints are set up equal/opposite of each other. You wont get too much movement on a coil set (wrap up), but on a leaf spring truck, the springs wrap quite a bit, & do change the pinion angles on hard acceleration. what I have seen done on leaf setups for high perf /drag (1 pc shaft), is to set both angles 3 degrees down toward to ground. it will run smooth this way, & under full power, it will kick the pinion up around 6 degrees(still running 3 degrees on both ends). crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

02-27-2011, 03:02 AM	#4
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,031	Re: Pinion angle\2 piece driveline question How much have you lowered the truck from factory? I have a 5/6.5" drop on my SWB, with the factory 2 piece driveshaft. I did not need to correct the pinion angle, and no shims were needed. Moved to suspension forum. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul Last edited by leddzepp; 02-27-2011 at 03:03 AM.

02-28-2011, 02:43 AM	#6
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,031	Re: Pinion angle\2 piece driveline question Here is a thread with some very helpful info: http://67-72chevytrucks.com/vboard/s...d.php?t=397394 __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

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02-26-2011, 04:32 PM	#1
ItsRandy Registered User Join Date: Nov 2010 Location: Grand Terrace, Ca. Posts: 1,607	Pinion angle\2 piece driveline question I'm getting ready to set the pinion angel on my coil spring 69 1\2 ton long bed. I have information that you set the pinion angle just as you would if you were working on a single piece driveline (pinion 3* above horizontal, crank\out put shaft 3* below horizontal)...does anyone know, is this true? Location of the carrier bearing doesn't come into play?



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