Driveshaft offset - Chevy Nova Forum
Visit our sponsor, National Nostalgic Nova
 
Steve's Nova Site is an automotive enthusiast website dedicated to the 1962 - 1979 Chevrolet Nova, Chevy II and Acadian automobiles. We work together to preserve, restore, drive, show, race and provide fellowship for these classic cars. This is one of the best places to find information about parts, rebuilding, restoration and racing. This website is not affiliated with GM, General Motors or Chevrolet in any capacity.

Go Back   Chevy Nova Forum > Body, Chassis and Mechanical > Drivetrain & Performance


StevesNovaSite.com is the premier Chevrolet Nova Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
Old 11th-January-2017, 11:28 AM   #1
Burnett03

Title: Nova Newbie
iTrader: (0)
Status: Offline
Join Date: Oct 2016
Location: Denver,CO
Nova(s): 65'
Posts: 36
Driveshaft offset

I've read a lot of threads and have seen that the engine is offset about 1 inch to the passenger side. I am currently building a 65 and working on the rear end right now. Just installed a cross member and frame rails. Now i would like to start building the 4 link setup. However the car has no engine, no trans, and no front clip. I know i will be using the Alston front clip and they told me it offsets the engine 1/2 to the passenger side. My question is can i even build the 4link without the front clip, engine and trans? How will i know where to position the ford 9 so it aligns with the transmission? I'd like to get the rear end somewhat done so i can roll the car around the garage. Can i just position the ford 9 to be 1" offset on the passenger side?
Here is my build thread to show you what I'm doing.

Thanks guys.
  Reply With Quote
Sponsored Links
Advertisement
 
Old 11th-January-2017, 11:49 AM   #2
Pragmatist
 
Pragmatist's Avatar

Title: Nova Guru
iTrader: (3)
Status: Offline
Join Date: Nov 2006
Location: NE Florida
Posts: 3,102
Garage
Just as a driveshaft can articulate up and down it is also able to work with a rear end offset to one side or the other.
__________________
66 & 67 hard top,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My 1980 avatar pic.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
  Reply With Quote
Old 11th-January-2017, 02:09 PM   #3
Burnett03

Title: Nova Newbie
iTrader: (0)
Status: Offline
Join Date: Oct 2016
Location: Denver,CO
Nova(s): 65'
Posts: 36
Thank you for taking the time to reply. What I get out of your reply is get the pinion close in the tunnel and let the u joint do the rest.
  Reply With Quote
Old 11th-January-2017, 03:00 PM   #4
MTNNOVA

Title: Nova Senior Member
iTrader: (0)
Status: Offline
Join Date: Jan 2009
Location: NorCal
Nova(s): 1967 2Dr HT
Posts: 220
You might get lucky, but if I were you, I would research driveline angles a little more before proceeding. Get them wrong and you can have some very irritating problems later. If memory serves me right, you need to know the centerline angle of the engine/transmission(usually about 3 degrees down at the tailshaft). The centerline of the pinion shaft is usually set 1 degree lower at the front. This will allow the joint to exercise as it runs and avoid premature joint failure and also compensate for some axle wrap as the pinion shaft will try to rise under power, although not as much with a four link. I believe the optimum lateral offset is 0-1 degree for each 10-12 inches of driveline length. with 3 degrees per 10-12 inches being maximum. Greater angles are often run, particularly on 4X4s, but often lead to early joint failure and irritating vibrations.
  Reply With Quote
Old 11th-January-2017, 04:05 PM   #5
Seattle_Mike
 
Seattle_Mike's Avatar

Title: Moderator
iTrader: (0)
Status: Offline
Join Date: Feb 2004
Location: Seattle, WA
Posts: 9,178
You are correct, the Chassisworks clip does keep the stock offset location. No question it's desirable to keep the drivetrain perfectly aligned, why wouldn't you do it? A zig-zag alignment may get you by, but if you are going to all the expense & effort to do a quality build, you might as well do it right.
__________________
33 Ford 3 Window 468ci BBC
68 Camaro ProMod 848ci Buck Racing Engines Nitrous

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
  Reply With Quote
Old 11th-January-2017, 04:12 PM   #6
Pragmatist
 
Pragmatist's Avatar

Title: Nova Guru
iTrader: (3)
Status: Offline
Join Date: Nov 2006
Location: NE Florida
Posts: 3,102
Garage
Quote:
Originally Posted by Seattle_Mike View Post
You are correct, the Chassisworks clip does keep the stock offset location. No question it's desirable to keep the drivetrain perfectly aligned, why wouldn't you do it? A zig-zag alignment may get you by, but if you are going to all the expense & effort to do a quality build, you might as well do it right.
I would agree but it's more esthetics than mechanically necessary. The driveshaft doesn't know or care which end is up, north or sideways. What matters is if the plane is parallel.
__________________
66 & 67 hard top,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My 1980 avatar pic.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
  Reply With Quote
Old 11th-January-2017, 04:34 PM   #7
Burnett03

Title: Nova Newbie
iTrader: (0)
Status: Offline
Join Date: Oct 2016
Location: Denver,CO
Nova(s): 65'
Posts: 36
Quote:
Originally Posted by Seattle_Mike View Post
You are correct, the Chassisworks clip does keep the stock offset location. No question it's desirable to keep the drivetrain perfectly aligned, why wouldn't you do it? A zig-zag alignment may get you by, but if you are going to all the expense & effort to do a quality build, you might as well do it right.
Thank you for your input. I agree it is better to do it once i have everything. I was just trying to do things little by little to keep the cost spread out. I will have to buy the chris alston clip, engine and the rear end setup all at once which i was trying to avoid.
  Reply With Quote
Old 11th-January-2017, 06:07 PM   #8
Roddychop

Title: Nova Junior Member
iTrader: (0)
Status: Offline
Join Date: Oct 2016
Location: Alberta
Posts: 96
If you take the time to read this it will explain everything you need to know

http://www2.dana.com/pdf/J3311-1-DSSP.pdf

If the engine and trans are square in the frame and the rear end is also square , the driveshaft won't care about the angle as long as they cancel out, providing your not past the maximum working angle of the u joint. If the tailshaft of the trans is pointing down 3 degrees you will need to point the diff pinion up 3 degrees so they also cancel out. This angle is assuming the car is at ride height and the car is weighted as if it was driving down the road.
  Reply With Quote
Old 11th-January-2017, 07:04 PM   #9
Pragmatist
 
Pragmatist's Avatar

Title: Nova Guru
iTrader: (3)
Status: Offline
Join Date: Nov 2006
Location: NE Florida
Posts: 3,102
Garage
Quote:
Originally Posted by Roddychop View Post
If you take the time to read this it will explain everything you need to know

http://www2.dana.com/pdf/J3311-1-DSSP.pdf

If the engine and trans are square in the frame and the rear end is also square , the driveshaft won't care about the angle as long as they cancel out, providing your not past the maximum working angle of the u joint. If the tailshaft of the trans is pointing down 3 degrees you will need to point the diff pinion up 3 degrees so they also cancel out. This angle is assuming the car is at ride height and the car is weighted as if it was driving down the road.
And in the same vein if the engine is square with the chassis the rear end doesn't have to be directly in line. It can easily be an inch to either side.
__________________
66 & 67 hard top,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My 1980 avatar pic.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
  Reply With Quote
Old 11th-January-2017, 07:13 PM   #10
Burnett03

Title: Nova Newbie
iTrader: (0)
Status: Offline
Join Date: Oct 2016
Location: Denver,CO
Nova(s): 65'
Posts: 36
Quote:
Originally Posted by Roddychop View Post
If you take the time to read this it will explain everything you need to know

http://www2.dana.com/pdf/J3311-1-DSSP.pdf

If the engine and trans are square in the frame and the rear end is also square , the driveshaft won't care about the angle as long as they cancel out, providing your not past the maximum working angle of the u joint. If the tailshaft of the trans is pointing down 3 degrees you will need to point the diff pinion up 3 degrees so they also cancel out. This angle is assuming the car is at ride height and the car is weighted as if it was driving down the road.
I will give it a read, thank you very much.
  Reply With Quote
Old 11th-January-2017, 07:21 PM   #11
Roddychop

Title: Nova Junior Member
iTrader: (0)
Status: Offline
Join Date: Oct 2016
Location: Alberta
Posts: 96
I meant the link for the original poster, you obviously know the theory. Most pinions are not centered as u joints wear longer if they have at least a 1 degree working angle.
  Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Offset? laser-red-nova Wheels and Tires 2 17th-March-2016 03:58 AM
Offset? blownnova Steering, Suspension, and Chassis 1 28th-January-2011 02:41 PM


Site best viewed set to 1024 x 768.

All times are GMT -4. The time now is 02:23 AM.

Custom Designed for Steve's Nova Site by: vBSkinworks

 
Powered by vBulletin® Copyright ©2000 - 2017, Jelsoft Enterprises Lt
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.