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rear end degrees????

Discussion in 'The Hokey Ass Message Board' started by 58belair, Nov 7, 2010.

  1. 58belair
    Joined: Sep 16, 2010
    Posts: 225

    58belair
    Member

    at what degree is the rear axle supposed to be at????

    im mounting my four link this week and setting my axle in

    thanks
     
  2. Depends on where the engine/tranny are pointed.
     
  3. gsport
    Joined: Jul 16, 2009
    Posts: 677

    gsport
    Member

    a good setting is trans 3° down, and the rearend 3° up...
     
  4. brucer
    Joined: Jun 5, 2008
    Posts: 332

    brucer
    Member
    from western ky

    i downloaded this diagram here.. dont remember who the original poster was..

    this is about the best diagram i've seen of different rearend setups..
     

    Attached Files:

    Last edited: Nov 8, 2010
  5. 58belair
    Joined: Sep 16, 2010
    Posts: 225

    58belair
    Member

    thanks,,,this should help
     
  6. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    That depends on your driveshaft angle. Mock the car up at ride height and move the axle yoke up or down till you have (ideally) an equal but opposite angle between the drive shaft and yoke on either end. On a link style setup it should probably be about 1-2 degrees. You can also start by setting the rear axle yoke at the same angle as the transmission yoke at ride height and achieve the same end.****uming it gives you the minimum 1 deg. angle.
     
  7. 58belair
    Joined: Sep 16, 2010
    Posts: 225

    58belair
    Member

    so if the trans is 2 degrees down i should set the rear end at 1 degree up?
     
  8. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    Same same, 2 on each end. You just want some angle on each end to prevent brinneling of the U joints and maybe help prevent vibration and not too much as to cause accelerated wear on them.
     
  9. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    Also, if they are equal but opposite, they increase and decrease in angle at the same rate through travel. It's thought that if there are different angles at each end they occilate at different speeds and cause detrimental harmonics (vibration).
     
  10. brucer
    Joined: Jun 5, 2008
    Posts: 332

    brucer
    Member
    from western ky

    on my T (street car) i'm using radius rods.. i set the engine/trans at 1 1/2 down.. set rearend 1 1/2 up...


    on the cars and trucks i've set up for track use all using ladderbars i set the engine/trans at 0, and set rearend at 3 deg. pointing down..
     
  11. lawman
    Joined: Sep 19, 2006
    Posts: 2,665

    lawman
    Member

    As Gsport said 3 up 3 down. Tom (Tired Old Man)
     
  12. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    This chart keeps showing up without mentioning the fact that it is for setting up a drag car where the goal is to have 0 angle at each end when under load for less friction. Its from the Rossler Transmissions site and is not really practical for a street rod thats going to see a lot of miles cruising level (rear suspension unloaded). It works for the application it's meant for but is confusing and contradictory in this type of application.
     
  13. Lukydevl
    Joined: Feb 23, 2010
    Posts: 700

    Lukydevl
    Member
    from Arizona

    Will this be the same with a ladder bar setup, Mainly for street use???
     
  14. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    Yep.
     

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