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Allignment question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by LA91Blazer, May 28, 2001.

  1. LA91Blazer

    LA91Blazer Registered Member

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    Hey all, what is the differance between Caster and Camber?
    Is caster side to side(or horizontal to the wheel), while Camber is top to bottom(vertical to the wheel)?
    How are these adjustments made on the K5?

    Thanks

    BlazingWolf
     
  2. Twiz

    Twiz 1/2 ton status

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    Caster- is the inclination of the front spindle. Positive caster is when the upper ball joint it tilted back towerds the cab- like the front forks on a bike, It helps with high speed stability, cornering, and "return to center". Negative caster is like a grocry cart, It helps in resiting a change in direction, like cross winds, but has poor return to center feel and poor cornering characteristics (had to look that word up)

    Camber- is the tilt of tops of the tires in or out. Negative camber is the tilt of the tops of the tires in.

    Adjustments are made with a upper ball joint sleave that has a offset hole, This offset hole will "walk" the upper ball joint stud around to st up both caster and camber. There are also taperd spindle shims that help with camber adj.

    Twiztid
     
  3. taterblazer

    taterblazer 1/2 ton status

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    Are you sure that sleeve sets camber and caster? I just did ball joints and nothing in the directions mentioned it. They just give you a torque spec for it.
     
  4. Twiz

    Twiz 1/2 ton status

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    A freash set of ball joints come with a sleeve that sets it "straight up". The offset sleeve is installed when the alighnment is done.

    Twiztid

    <P ID="edit"><FONT SIZE=-1>Edited by Twiztid on 05/28/01 08:47 PM (server time).</FONT></P>
     
  5. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    There is also a Wedge shim avaialable that can adjust the camber. It installs between the spindle and knuckle. Caster is not adjustable on our trucks without cutting off the end of the axle. Well that's not totaly true you can shim the axle to adjust it. Or some minor adjustment made with the offset sleeve. Problem is it then changes the pinion angle (shim). Another issue to point out is shims for adjusting pinion do change your caster angle and this does help to contibute to bumpsteer. With a tall lift that requires a lot of pinion angle change it would be advisable to spend the cash to have the axle modified to correct the caster. This is a job for a pro shop. Not anyplace where a person with questionable welding skills wan'ts to play around with.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  6. Twiz

    Twiz 1/2 ton status

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    Makes me nervouse when I see the "posting death" reply after me.

    Twiztid
     
  7. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    You got a long while before you got to worry about that [​IMG]

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  8. LA91Blazer

    LA91Blazer Registered Member

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    Thanks for the answers
    I just installed a 6" lift, and the Superlift springs came with a shim to adjust pinion angle. I saw some thread with this mentioned thats why I asked for clarification.

    Do I need to worry about getting my camber adjusted to correct for the lift shim?

    Thanks

    BlazingWolf
     
  9. CaptCrunch

    CaptCrunch 1/2 ton status

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    Well BW... I'm installing a 6" BDS lift right now and am looking at the same problems and hassles. My plan is to leave the t-case in place and run a CV in the rear. Hopefully I will get little or no vibe in 4wd... if I get one I'm gonna try a very small 1 or 2 degree shim which shouldn't change the handling too much. My kit cam w/ a 4 degree shim which would probably end up causing some steering issues from what I have heard. I concieved this plan talking w/ Glen at BDS and concidering it is only 100 extra to get a CV shaft opposed to the lengthening of the stock shaft.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     
  10. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    I'm running a 4 inch lift with 2.5 degree shims. If your truck is part time you can probably get away with it and not need to do any more correction. The drive shaft wont be at the perfect angle but your not going to get the vibes since if it is a part time case. The bumpsteer I did get I was able to take care of with the ORD brace and the ORD sway disconnects. Most of my problem was sway bar binding and the discconects cured that. My truck has soft suspension and running without the sway at hwy speed was pretty scarry in a cross wind or nead semi's. Now I do notice the extra caster because there is a slight wander in the truck but nothing bad and I'm not going to worry about it.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  11. LA91Blazer

    LA91Blazer Registered Member

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    Ok thanks for all the info, but not sure yet what I need. I droped the transfer case by 1 1/2" and that solved the vibration problem. But this caused the front drive line to grind heavly into the exhaust crossover pipe. So $65 later I got that fixed and the tailpipe welded back on.
    The superlift springs had shims built into them, I dont know what angle. Do I need a new drive shaft with the 6" lift? This was not budgeted for, I hope not. Friday I get the new tires mounted and balanced. I'm planing to have them (4WPW) do an alignment. $50 for a toe only alignment. He said it could be upwards of $140 if I have camber problems. I looked at the front end but I can't tell. It looks like the tops of the wheels are a little farther outside than the bottoms. Any advise?
    Thanks
    P.S. my front drive shaft apperantly always rotates regardless of being in 2H or not, Does this mean I have a full time transfer case?

    BlazingWolf
     
  12. 90K5

    90K5 1/2 ton status

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    Your hubs might be locked if the driveshaft rotates.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  13. LA91Blazer

    LA91Blazer Registered Member

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    They are auto locking hubs, I reversed for a couple of meters to make sure they were disconected. They are the next thing to be replaced, if I ever get any more funds to put in to the Blazer.

    BlazingWolf
     

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