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: 9,403	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: 20,004	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 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: 20,004	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

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?



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.