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extreme front driveline angle

Discussion in 'Solid Axle Suspension' started by fireturk41, Feb 10, 2011.

  1. Feb 10, 2011 at 2:13 PM
    #1
    fireturk41

    fireturk41 [OP] I like to break shit!

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    the angle on my front d-shaft is extreme after my SAS due mailnly to the fact i needed a shorter d-shaft and the truck sits higher, anyone else have this problem? or any remedys? its a pain always unlocking hubs just so i dont feel extreme vibes
     
  2. Feb 10, 2011 at 4:48 PM
    #2
    PreRunnerSeth

    PreRunnerSeth Well-Known Member

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    You need to correct your pinion angle. Should be roughly the same angle up as your drive shaft is angle down. You can use shims to do this, but this will throw off your caster. what you really need to do is weld on steel shims to correct your pinion angle. then take your axle to a shop and have them do a cut and turn to correct your caster angle so that your truck tracks properly on the highway. Anything 2* or less and you will have steering issues. best to have it corrected to 5-6*. I was quoted $600 by a local shop when i was planning on doing this with the scout.

    If your pinion angle is already as good as you can get it then you will most likely need a CV drive shaft. If you already have one and your pinion is right then i have no idea... HAHAH..
     
  3. Feb 10, 2011 at 7:48 PM
    #3
    Supra TT

    Supra TT Solid Axle FTMFW!!

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    SAS.. Need I say more.
    x2 ^.... also

    :worthless:
     
  4. Feb 11, 2011 at 4:02 AM
    #4
    fireturk41

    fireturk41 [OP] I like to break shit!

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    ill take pics this afternoon its effin cold out. i guess ill do that and hi-steer at the same time lol
     
  5. Feb 11, 2011 at 7:10 AM
    #5
    Janster

    Janster Old & Forgetful

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    Like Prerunnerseth said....
    If you want to do it 'right' (and it'll be expensive)...get the perches moved (for driveline angle) & the caster properly adjusted (knuckles moved/rewelded).

    Definately get have hy-steer done.

    Aside from that - Shims on the front are illegal here in PA. Not sure what your state laws would be.

    Just a note - if you a get CV driveshaft ...do it now and set the driveline angle for it. If you set the angles without the CV and decide to buy one later....you'll probably have to redo the angles. http://www.4xshaft.com/driveline101.html
     
  6. Feb 11, 2011 at 8:28 AM
    #6
    PreRunnerSeth

    PreRunnerSeth Well-Known Member

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    The right way to correct the pinion would be to cut off the perches and then weld on new ones, but this comes with some other issues. With front axles the diff is off center. In this case it is shifted to the drivers side. Often the spring perch on that side is cast into the pumpkin. This makes it very difficult to simply cut off the perch and weld on a new one for a couple reasons. one, its cast into the pumpkin and cannot be cut off and two it is very difficult and requires some serious skill to weld onto cast steel correctly. Simply using a shim is the easiest way to fix this and then redo the perch on the other side (the axle tubes are not cast). The other way is to grind the perch on the pumpkin to get the desired angle, but this weakens the pumpkin as you are removing base material from it.
     
  7. Feb 11, 2011 at 11:11 AM
    #7
    Janster

    Janster Old & Forgetful

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    I swapped Dana 44 axles under my Jeep - and I had similar issues myself. I had to cut into the webbing on mine. I had a shop cut the knuckles and set the caster after the perches were set.

    I didn't want to mention details because I'm not familiar with his paticular situation.

    If you use a shim, then it should be completely welded into place. I don't know what kind of axle he's using - but if he has a Grand Wagoneer axle, the perches are CAST - so welding steal onto cast is gonna be required anyway.

    I had front & rear axles off an 89 Grand Wagoneer and the perches were cast.
     
  8. Feb 12, 2011 at 2:40 PM
    #8
    fireturk41

    fireturk41 [OP] I like to break shit!

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    yes, im using the axle outta an 89 grand waggy, so the best and most efficient way would be to weld shims to the perches?
     
  9. Feb 13, 2011 at 7:23 AM
    #9
    Janster

    Janster Old & Forgetful

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    Who's doing the welding work?

    I would take it to a good 'speed' type shop or a shop that customizes vehicles & hot rods. They could help you set the proper pinion angle and have suggestions on exactly how to do it - whether its a shim or a custom fabricated piece of steal, or they might have a better option.

    Then.....after they get the pinion angles set and welded, I would have them cut your knuckles to set caster. They have special equipment that'll set both sides exactly the same and they'll weld them to the tubes at the right spots.

    We had both our rear & our front D44 angles & knuckles done at the same shop. To me....this type of work isn't something you should hack up in your back yard. It's expensive, but atleast you know its done right.
     
  10. Feb 13, 2011 at 8:12 AM
    #10
    fireturk41

    fireturk41 [OP] I like to break shit!

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    olivers custom driveshafts, they are very well known in the area and do great work from what i heard, they bult both my dshafts and they turned out great
     
  11. Feb 13, 2011 at 3:33 PM
    #11
    Janster

    Janster Old & Forgetful

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    Sounds good!

    Hopefully they know how to set pinion angle and cut/rotate knuckles for caster........

    Good Luck and let us know how things go!
     
  12. Feb 15, 2011 at 10:14 AM
    #12
    fireturk41

    fireturk41 [OP] I like to break shit!

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  13. Feb 15, 2011 at 4:32 PM
    #13
    Supra TT

    Supra TT Solid Axle FTMFW!!

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    Rotate the pictures........... Ass lol :)

    Also it probably because of the side pictures... However, that angle doesn't look bad at all.

    This is an extreme DS angle...
    [​IMG]
     
  14. Feb 15, 2011 at 7:45 PM
    #14
    fireturk41

    fireturk41 [OP] I like to break shit!

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    Lol I could if I would, my phone makes the pics retarded. Its not extremely bad it just grinds when the hubs are locked or the trans case is in 4wd. It also makes a death wobble lol that and I'm afraid of breaking the u joint
     
  15. Feb 15, 2011 at 11:10 PM
    #15
    Janster

    Janster Old & Forgetful

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    Yeah....

    Extremely USELESS!!!:D

    Owww...my eyes!!!! Turn it off!!!
     
  16. Feb 16, 2011 at 4:53 PM
    #16
    Supra TT

    Supra TT Solid Axle FTMFW!!

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    I think you are hearing something else grind....:confused: Get it balanced.. I thought you had a shop make these DS's? Or did I misread? You said they built both your DS's and they work great... Well from what you're telling me.... You lied :eek:

    I can't turn off pure bling bling.. Sorry it's just so....






























    Sorry.. I got lost staring at the............






























    Not again.. :cool:
     
  17. Feb 16, 2011 at 4:58 PM
    #17
    fireturk41

    fireturk41 [OP] I like to break shit!

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    yeah they built and balanced both, im sure its the ds grinding, it only happens in 4wd or if i lock the hubs. hey the ds's work great for me, better than the last shop that redneck rigged it w/o balancing (that one broke)
     
  18. Feb 27, 2011 at 9:02 AM
    #18
    awsumdc

    awsumdc Well-Known Member Vendor

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    Don't use shims. Do it right and cut off your spring perches, and rotate your knuckles for the correct pinion angle. Then get a CV for the rear of your drive shaft. All of this in conjunction will allow you to drive your truck while the hubs are locked on the street. Mine were left locked once while traveling down the freeway at 70mph. Don't recommend it but it did no harm and there were no vibrations.
     
  19. Feb 27, 2011 at 9:12 AM
    #19
    fireturk41

    fireturk41 [OP] I like to break shit!

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    had a while to wheel it and ponder, i probably wont mess with the pinion angle, i looked at other SAS yotas this weekend and saw similar if not exact angles, plus if i can ever afford and decide to put in dual cases and tons, the problem should be eliminated then, rather than throw money at it now. also i plan to go to flat top knuckles very soon

    it works great so why fix it if it aint broke, ya know?

    and i do have a cv in the rear d shaft and it is awersome!

    thanks for all the advise
     
  20. Feb 27, 2011 at 12:25 PM
    #20
    awsumdc

    awsumdc Well-Known Member Vendor

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    Yeah, if you go with dual t case's then that will help. But your gonna want to put a CV in that front drive shaft at the t case end of it. Trust me, it's be a lot better than it is now. Even when you go to dual case's.
     
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