Is this normal?

Discussion in '1974 - 1978 Mustang II Talk & Tech' started by HaveII, Jul 9, 2004.


  1. zwhitr

    Founding Member

    Joined:
    Aug 27, 2001
    Messages:
    847
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Goldsboro, NC

    So what's the verdict? are the II axles the equal length I had mine out twice but can't remember..
    I read once the twisting action of the car actually lifts the right rear up off the ground so car manufacturers made the axle longer on that side and the left side shorter. and offset the housing

    This gives the longer axle less torque IE.. never use an extension on a torque wrench causes improper tightness.
     
    #21
  2. Johan

    Johan Member

    Joined:
    Jun 13, 2003
    Messages:
    81
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    Waldheim, LA
    The axles are definitely not the same length. As far as why, I always thought it was for packaging. It's true that driveshaft torque applied to the rear axle tends to lift the right rear, but it doesn't matter where along the axle you apply that torque - it's the same amount of torque. As far as torque at the wheel, the shorter axle will deliver more torque, assuming their inboard ends turn the same amount. If you think of the axles as torsion bars with a certain 'spring rate' of so many foot-lbs per degree of twist, the longer shaft will be softer. It's like if you stand a 500lb/in spring next to a 1000lb/in spring (same free length), tie the two free ends together and compress the whole setup 1in. The soft spring has 500lbs of force on it and the heavy spring has 1000lbs of force on it. This is what gives the front drivers torque steer.

    I disagree with you about the extensions on a torque wrench. Extensions on an impact wrench will lose a lot due to taking up clearances between hits. As long as all of your extensions are in line (no u-joints or leaning extensions) with the bolt being tightened, you're good. The extension will twist, and clearances between the parts will be taken up, but 90ft-lbs applied is 90ft-lbs applied. The difference is that instead of hearing a click after twisting the wrench say 45 degrees, you will hear the click after twisting 45.0xxx degrees.

    I'm rambling again, aren't I.
     
    #22
  3. Dano78

    Founding Member

    Joined:
    Nov 1, 1999
    Messages:
    2,636
    Likes Received:
    0
    Trophy Points:
    47
    Location:
    Vancouver, WA
    Action = Equal and opposite Reaction

    It's actually the rotational force of the driveline that causes the RR tire to lift. When the Tires are planted, the rear end is locked, and the driveline is twisting the torque, where's it gonna absorb? Ever wonder why a car will pull the LF wheel on a really hard launch? The tranny/driveline tries to turn the whole axle like it'd turn a propeller (say, if the axle wasn't attached) Try ram-rodding it in reverse, I bet you'd find that the LR tire will be the one picking up and breaking loose the easiest. (not always true though)

    As far as the axle shafts, yes I'm willing to bet all the shafts will interchance as long as the housings share the same overall width. -as most intermediates are. (i.e. an 8" out of a 71-73 stang/cougar definately wouldn't work because they are wider overall)
     
    #23
  4. 2muchtime

    Founding Member

    Joined:
    Jan 30, 2002
    Messages:
    890
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    MA.
    there is a big difference in the left and right II axles. (simply said)
    ome is 25 7/8in the other is 29 7/8in..

    back to the scoop i simply cut a 12 in centered hole in my hood, used the factory scoop and installed a k+n top flow 9 in lid.. im done..
    the only pic i have is with the scoop off , getting ready for paint.
    i also have a pic on axles..
     

    Attached Files:

    #24
  5. Wart

    Wart I'm Mad as HELL and I'M not Gonna Take it ANYMORE!
    Founding Member

    Joined:
    Sep 1, 1998
    Messages:
    3,121
    Likes Received:
    0
    Trophy Points:
    56
    Location:
    NE Ohio

    Measured from where?
     
    #25
  6. THE COBRAMAN

    THE COBRAMAN pig 'rassler
    Founding Member

    Joined:
    Mar 11, 1999
    Messages:
    1,972
    Likes Received:
    0
    Trophy Points:
    36
    Location:
    Oklahoma
    Re: axle shafts, bearings, and retainer plates

    In my case, it was far from a simple swap. When attempting to swap bearing retainer plates, they would not drop over the Maverick shafts. As I recall, the Mav shafts had a larger shoulder at the bearing ID, so I wound up having the shafts machined to use the II plates, bearings, and collars.
     
    #26
  7. Dano78

    Founding Member

    Joined:
    Nov 1, 1999
    Messages:
    2,636
    Likes Received:
    0
    Trophy Points:
    47
    Location:
    Vancouver, WA
    Sorry, i guess we got a little :OT: :D Just have to ask Cobraman what year of maverick he got his axles from. Reason why I ask is because the axle shafts did change after '73. If it was a '74-up I could definately see where machining would be needed, as the axles do have a little more beef.

    OKAY...... Back to you! :jester:
     
    #27
  8. THE COBRAMAN

    THE COBRAMAN pig 'rassler
    Founding Member

    Joined:
    Mar 11, 1999
    Messages:
    1,972
    Likes Received:
    0
    Trophy Points:
    36
    Location:
    Oklahoma
    :rlaugh: :rlaugh: :rlaugh: :rlaugh:

    Dude, that was 20 years ago!!! I don't know, but it was dark green, if that helps! :rlaugh:

    Seriously, weren't the early Mavs all 4-lug, til the discs came on board about '74 or so?
     
    #28
  9. Dano78

    Founding Member

    Joined:
    Nov 1, 1999
    Messages:
    2,636
    Likes Received:
    0
    Trophy Points:
    47
    Location:
    Vancouver, WA
    Whaddya mean ONLY 20 years!!??!! Geezzzz makes sound like the mind ROTS with age... :eek:

    One would think but.... the V8 Mavericks/Comets were all 5 lug and in '72 Disc Brakes were added to the option list but were for the most part, unheard of. And just as you said, disc brakes did became standard on all post-'74 V8 Mavs and more common on even the I6 Mavs as wellas the dropout 8" rear axle. Alot of the earlier (69-73) I6 mavs did once in a while use the weak Falcon integral rear axle. Funny thing was, power assisted Disc brakes on a maverick was a hit and miss option. Alot of them were non-power assist disc brakes. :scratch:
     
    #29

Share This Page