Driveline phasing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mechanixman · 08-19-2013, 11:21 PM

Hello Everyone

I got my motor mounts in the mail yesterday, and I plan on welding them in tomorrow. I have some questions regarding motor placement. I read this page,
http://jniolon.clubfte.com/driveline...nephasing.html
and it has helped, but I have a 2 piece driveshaft and I was wondering if the same rules apply.

Also, how much could move the motor over towards the passenger side?
I'm concerned if I line it up straight, the exhaust manifold will hit the steering box.
What is your guys' experience on this?

1project2many · 08-20-2013, 07:41 AM

Put 1 - 1.5 deg vertical angle into the first joint at trans. Set pinion angle to match front shaft angle. Second shaft angles will automatically cancel. Can do similar with horizontal angles / engine offset and carrier bearing position.

http://65.170.161.218/~spicerpa/site...stallation.pdf

(Yes, there is a LOT of information there.)

solidaxel · 08-20-2013, 08:19 AM

Quote:

Originally Posted by 1project2many

Put 1 - 1.5 deg vertical angle into the first joint at trans. Set pinion angle to match front shaft angle. Second shaft angles will automatically cancel. Can do similar with horizontal angles / engine offset and carrier bearing position.

http://65.170.161.218/~spicerpa/site...stallation.pdf

(Yes, there is a LOT of information there.)

Thanks, I stored it for future use............................................in my head!!

Yea right !

1project2many · 08-20-2013, 03:15 PM

Quote:

Thanks, I stored it for future use............................................in my head!!

Yea right !

: ) It's the most complete and correct reference I could find in fifteen minutes or less.

OrrieG · 08-20-2013, 06:23 PM

applies to steering universals too, borgsen has a great how to section on multijoint phasing.

mr48chev · 08-20-2013, 06:35 PM

Page 14 on the link 1project2many shows you what you need to know. Notice how the U joints and shafts are laid out so that the shaft never binds as it rotates.

That whole pfd is really good info that everyone needs to save in their Bookmarks tech file for future reference.

mechanixman · 08-20-2013, 10:27 PM

Well thank you all for the help.
I read through the PDF almost as soon as 1Project2many posted it.
I have my motor mounts welded in. And I'll get to work on the trans mount soon.

1project2many · 08-21-2013, 09:41 AM

Quote:

Page 14 on the link 1project2many shows you what you need to know. Notice how the U joints and shafts are laid out so that the shaft never binds as it rotates.

Also note the instructions to rotate the slip joint or rear shaft yoke 90 degrees when trans to shaft angle is large and second angle is small. This will force the U-joint to "work" and help prevent premature failure of the center joint. See figure ten on P. 14.

08-19-2013, 11:21 PM	#1
mechanixman Registered User Join Date: Sep 2012 Location: Mt. Prospect, ILL Posts: 820	Driveline phasing Hello Everyone I got my motor mounts in the mail yesterday, and I plan on welding them in tomorrow. I have some questions regarding motor placement. I read this page, http://jniolon.clubfte.com/driveline...nephasing.html and it has helped, but I have a 2 piece driveshaft and I was wondering if the same rules apply. Also, how much could move the motor over towards the passenger side? I'm concerned if I line it up straight, the exhaust manifold will hit the steering box. What is your guys' experience on this? __________________ -Nick Projects: 1952 Chevy 1 ton = The Build page

08-20-2013, 07:41 AM	#2
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,168	Re: Driveline phasing Put 1 - 1.5 deg vertical angle into the first joint at trans. Set pinion angle to match front shaft angle. Second shaft angles will automatically cancel. Can do similar with horizontal angles / engine offset and carrier bearing position. http://65.170.161.218/~spicerpa/site...stallation.pdf (Yes, there is a LOT of information there.)

08-20-2013, 06:23 PM	#5
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: Driveline phasing applies to steering universals too, borgsen has a great how to section on multijoint phasing. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

08-20-2013, 06:35 PM	#6
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,410	Re: Driveline phasing Page 14 on the link 1project2many shows you what you need to know. Notice how the U joints and shafts are laid out so that the shaft never binds as it rotates. That whole pfd is really good info that everyone needs to save in their Bookmarks tech file for future reference. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

08-20-2013, 10:27 PM	#7
mechanixman Registered User Join Date: Sep 2012 Location: Mt. Prospect, ILL Posts: 820	Re: Driveline phasing Well thank you all for the help. I read through the PDF almost as soon as 1Project2many posted it. I have my motor mounts welded in. And I'll get to work on the trans mount soon. __________________ -Nick Projects: 1952 Chevy 1 ton = The Build page



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