how short to make drive-shaft - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-16-2003, 07:14 PM
Member
 
Join Date: Aug 2003
Location: calgary canada
Posts: 727
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
how short to make drive-shaft

I change the rear springs on my nova and went to reinstall the drive shaft but its seems that the company that made the springs don't know how to measure. The rear end now sits slightly more forward and I can't even slide the yoke far enough into the transmission to do the u-joint up. I think I'm gonna get the drive shaft shorted tomorrow but I"m trying to figure out by how much. At ride hight how should the yoke be from bottoming out on the output shaft? Right now at ride height i think its just bottomed out.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-16-2003, 07:24 PM
dmorris1200's Avatar
doesn't play well with others
 
Last photo:
Join Date: Feb 2002
Location: Maine
Age: 49
Posts: 1,834
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I would have to double check but I think with the suspension loaded (like when she's sitting normally on the ground) you should have about 1" to 1 1/2" from being bottomed out. I actually posted what mine was cut to but that was last year.


__________________
BUILT FORD TOUGH
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-16-2003, 07:30 PM
BstMech's Avatar
NYOFP4RJ3CHRIS
 
Join Date: Sep 2002
Location: TN. In the corporate states of America
Age: 41
Posts: 1,552
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Is it possible that the tie bolts on the springs are offcenter meaning that you could have the springs on backwards?

Take a good look and double check everything before you go getting the driveline shortened.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-16-2003, 07:36 PM
Member
 
Join Date: Aug 2003
Location: calgary canada
Posts: 727
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No I actually considered that possibility but I"m sure they are on the right way with the particular bushing they use in these springs its pretty hard to get them on backwards.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-16-2003, 07:37 PM
dmorris1200's Avatar
doesn't play well with others
 
Last photo:
Join Date: Feb 2002
Location: Maine
Age: 49
Posts: 1,834
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally posted by BstMech
Is it possible that the tie bolts on the springs are offcenter meaning that you could have the springs on backwards?
Oooops, that would suck>
I just checked incase you do need to cut and I allowed 1" from bottoming out. Good call BstMech.


__________________
BUILT FORD TOUGH
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-16-2003, 10:36 PM
Member
 
Join Date: Aug 2003
Location: calgary canada
Posts: 727
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Alright well I"m gonna remeasure it and see but I think I'm gonna have to have it shortened an inch thanks for the help guys
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-16-2003, 10:49 PM
Gene Neal's Avatar
Member
 
Last photo:
Join Date: Jan 2002
Location: San Deigo, Ca.
Age: 80
Posts: 59
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
springs

Perhaps! Just maybe the spring company put the bushing on the wrong end of the springs! ----------------------------------------Gene Neal
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-17-2003, 03:16 PM
Member
 
Join Date: Aug 2003
Location: calgary canada
Posts: 727
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ya thought of that one to but the center bolt is off set toward the front on these cars and thats the way these are installed.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 10-17-2003, 10:19 PM
Gene Neal's Avatar
Member
 
Last photo:
Join Date: Jan 2002
Location: San Deigo, Ca.
Age: 80
Posts: 59
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
springs

R/R! I just have to ask a dumb question, sorry but: are you sure that the spring center pin bolt is in the proper hole in the rear end housing and spacer block? I have seen the thing assembled with the c/pine in the square hole on the spacer block and the spacer block pine in the right hole on the rear end. this would give you the same type problem. Drive shaft to short or to long. I'm not even sure if you use a spacer block or not but I thought that it might be worth noting also if the spring are not the right one's, would it be possible to get the right one's instead of modifying your drive shaft. I assume that it all worked OK before the R and R . Well, I'm out of ideas. May be dmorris1200 has more to offer or someone one else on the board. ------------------------------Gene Neal
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 10-18-2003, 09:31 AM
dmorris1200's Avatar
doesn't play well with others
 
Last photo:
Join Date: Feb 2002
Location: Maine
Age: 49
Posts: 1,834
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Re: springs

Quote:
Originally posted by Gene Neal
Well, I'm out of ideas. May be dmorris1200 has more to offer or someone one else on the board. ------------------------------Gene Neal
To tell you the truth Gene I've never had to shorten a driveshaft because of a spring replacement. Of course that doesn't mean much since most of the springs I've replaced have been replaced with OE parts. Since this is the internet we also don't have the advantage of being able to get a hands on inspection. I had to shorten my shaft because I went from a 8inch to a 9inch rear and when I cut mine I was told 1" to 1 1/2" was how far out my slipyoke should be with the car on the ground.


__________________
BUILT FORD TOUGH
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 10-18-2003, 07:20 PM
adtkart@aol.com
 
Last photo:
Join Date: Oct 2002
Location: Newport News, VA
Posts: 3,220
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If all you are changing is the springs, you shouldn't have to shorten the drive shaft, unless you are really making a BIG difference in the stance of the vehicle. Since normally you can bottom out the suspension without bottoming out the drive shaft, something sounds really wrong. Aren't your tires too far forward?
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 10-18-2003, 07:48 PM
Member
 
Join Date: Aug 2003
Location: calgary canada
Posts: 727
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the help guys I figured it out today, at the same time a changed the springs I swapped from a 8.2" 10 bolt to a 8.5" which was suppose to be a direct swap but I did some measuring today and from the center line of the axle to the u-joint flange seems to be about 1 1/4 longer than the 8.2 inch hence the extra length. Ohhh cars nothing ever goes as planed
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 10-18-2003, 10:02 PM
Gene Neal's Avatar
Member
 
Last photo:
Join Date: Jan 2002
Location: San Deigo, Ca.
Age: 80
Posts: 59
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
springs

I'm glad to hear that you found the problem. And yes, I can see how that would make the deference. I do believe that Dmorris1200 had a hint about that in his last post. let use know how it all turns out. --gene Neal
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 10-19-2003, 05:31 PM
Member
 
Join Date: Aug 2003
Location: calgary canada
Posts: 727
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Well today I went to the wreckers and was measuring drive shafts it seems that all the car equipped with the 8.5" 10 bolt axles have a drive shaft that is 1 INCH SHORTER than the ones equipped t with the 8.2. I feel kinda dumb not having thought of that earlier but i had been told by so many people that it is a direct swap it never even occured to me anyway I pulled a drive shaft from one and got it for 20 bucks and just finished installing it, perfect fit. Anyways thanks alot for the your help guys glad I finally got to the bottom of that one
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 04:33 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.