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Going to a 12" suspension lift.....question about pinion angle?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BLzr4x4ngkid, Jan 16, 2002.

  1. BLzr4x4ngkid

    BLzr4x4ngkid 1/2 ton status

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    Going to a 12\" suspension lift.....question about pinion angle?

    I'm getting ready to do the unthinkable and head to a total 15" lift and 44's. Right now I'm going to go to a 12" suspension and run 40's. I'm definately going to cut the perches and reweld, but what's the best bet on the angle? I know the rear can be perfectly straight with the driveshaft, but what about the front? I know it can only go so far because the steering gets all whacked out. I already have a t-case drop with stock spacers, but does a bigger drop kit come with a 12" lift? Any kind of advice is welcome, and all negative comments will be ignored! hahaha Let me know what you guys think. Cya!

    Alex

    Pedal mashed and KICK'N ASS!
    WFO! Wide [censored]'n OPEN!
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Alex, bout time you got back here on the site!!! [​IMG]

    All I can say about cutting and turning the rearend is if you are running a CV shaft on the rear, turn your pinion up towards it more and leave it about 2 or 3 degrees less than a "dead-on" straight shaft.

    Maybe others will tell you in better terms what to do.

    BTW, let me know when you get your new springs. I would be interested in buying back those 8" springs I sold you. [​IMG] [​IMG]



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

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  3. BLzr4x4ngkid

    BLzr4x4ngkid 1/2 ton status

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Sounds good to me man. I'll let you know. CV would probably be the best bet wouldn't it?

    Pedal mashed and KICK'N ASS!
    WFO! Wide [censored]'n OPEN!
     
  4. CaptCrunch

    CaptCrunch 1/2 ton status

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    I would say the CV is almost a must at that point. Also if you ever want to drive on the street you will need to cut and turn up front or you will wander all over. No real experience first hand but this is what some of the big dawgs are running that I play with from time to time. Definetly get some pics up of that beast when you get rolling!

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  5. riz

    riz 3/4 ton status

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    <font color=purple> Mikey's right ......... cutting and turning the front would be the best bet ........ I had a truck with a 12" suspension lift and a 3" body lift and I had to drop my transfer case and cut and turn the front axle .......... It really wasn't too bad for handling on the street that way. There is a lot to think about before you tackle a job like this, think it over real good before you do anything ........... and please, do it so it's safe when you're done !

    L8r,
    . Riz . <a target="_blank" href=http://www.geocities.com/rizmonkey>www.geocities.com/rizmonkey</a>

    <font color=purple> monkeys steal my underwear at night
     
  6. BlzrProne17

    BlzrProne17 Registered Member

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    Re: Going to a 12

    I really think that you should just say screw it! Get your front end fixed then help me lift my heap! Lol. I'm just kiddin'. Know this though. When you want to go on another road trip i'll go down to 4 wheel whole stealer's with you. We'll fix my truck and drive it. Cool? We need a road trip.
    Later,
    Matt

    [​IMG] I'm a Chevy Man NOW! [​IMG]
     
  7. mnstr_fx

    mnstr_fx Registered Member

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Talk to Jess at High Angle Driveline. (I think that he uses drivelineguy or something like that on here). He has a 1350 CV and a 1410 CV system for trucks that are vertically challanged with bad driveline angles. It is definately worth a phone call to him to describe what you are doing and how you can make it work the best.

    I think that you are going to have to at least cut and re weld perches on the front and rear axle though.

    &lt;a href="http://highangledriveline.com"&gt;HighAngleDriveline.com&lt;/a&gt;

    76-82 Chevy Pickup / Blazer - K5-K10-K30
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  8. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Are you talking of cutting and welding the tubes so the caster is normal, but the pinion angle is better, or simply cutting and welding perches?

    I am thinking you're meaning cutting and welding the tubes, but some of you people make it sound like just perches.

    My friend has a 12" suspension lift and his truck wanders quite a bit because his caster sucks (crappy caster helps pinion angle though).

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  9. 1 FN HI K5

    1 FN HI K5 1/2 ton status

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    Re: Going to a 12

    Alex i am running a 15 inch lift with a 3 inch body with 44's
    drive line angle's are the most comon problem's. But very easy to set up.Then X over sterring is a must.Im using my stock driveline up front.You can check out my pic's Later
    <font color=red>1 FN HI K5<font color=red>

    <a target="_blank" href=http://community.webshots.com/user/1fnhik5>http://community.webshots.com/user/1fnhik5</a>
     
  10. k5'er

    k5'er Registered Member

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    Re: Going to a 12

    hey thats a great looking rig 1 FN HI K5!!! how is the crossover steering? is it worth it? does it help the wandering alot? hopefully when taxes come then i will be upgradeing to a 12" lift.

    Mud! Its cool!
     
  11. CaptCrunch

    CaptCrunch 1/2 ton status

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Yeah I was reffering to cutting the tubes to keep the alignment and wandering barable while rotating the diff up for drive shaft angle. Most guys here refer to it as cutting and turning the axle... where as most say rotate the perches or cut and weld the perches. Buy you are right that post was kinda vague [​IMG] Thanks for pinting that out.

    Since I thought of it and it could be related to this post... anyone ever run one of those double CV shafts? They have 2 CV joints (one at each end). Was wonderinging if those worked well for avoiding all the cutting and welding on the axle

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  12. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Cut and turn should only be required to do on a front axle.
    The rear does not need this expensive method when you can just cut the perches and reposition them. Saves money this way.
    As for cut and turn, I know Dynatrac and Fly-N-Hi do that type of work. This type of job definitely is not a DIY. [​IMG]



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

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  13. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Re: Going to a 12\" suspension lift.....question about pinion angle?

    Cut and turn should only be required to do on a front axle.
    The rear does not need this expensive method when you can just cut the perches and reposition them. Saves money this way.
    As for cut and turn, I know Dynatrac and Fly-N-Hi do that type of work. This type of job definitely is not a DIY. [​IMG]



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  14. 1 FN HI K5

    1 FN HI K5 1/2 ton status

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    Re: Going to a 12

    X over steering is the only way to go. When you do the swap your going to ask yourself why you didn't do this sooner.
    <font color=red>1 FN HI K5</font color=red>

    <a target="_blank" href=http://community.webshots.com/user/1fnhik5>http://community.webshots.com/user/1fnhik5</a>
     

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