Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

pinion angles?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by CAROLINAK5, Dec 14, 2001.

  1. CAROLINAK5

    CAROLINAK5 1/2 ton status

    Joined:
    Aug 2, 2001
    Posts:
    242
    Likes Received:
    0
    Location:
    lexington, north carolina
    how do i get the correct (or close to correct) pinion angles when i put my 14 bolt under the blazer?



    when all else fails..............HIDE!!!!!!!!!!!!!!!!![​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/albun32>http://coloradok5.com/gallery/albun32</a>
     
  2. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    Once you find out what your angles are (with an angle finder) and find out you need to correct (you may get lucky and not need it), you can:
    A.) Lower your t-case if needed
    B.) Shim the pinion with shims between the springs and perches to rotate the pinion up or down (depending on which way you put them in)
    C.) A combination of A and B
    D.) Remove the perches and reweld them so the angles are correct after carefully figuring out which way the axle needs to be rotated while under the full weight of the rig (ride height).

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  3. Yogizcoma

    Yogizcoma Registered Member

    Joined:
    Dec 14, 2001
    Posts:
    8
    Likes Received:
    0
    Location:
    Chandler, AZ
    When I mounted up the axles on the SAS's on did on a few Tacomas. I bolted up the axle under the truck with the spring perches just sitting there, but I did not torque down the ubolts. Then I rested the weight of the vehicle on the springs/axle and bounced it up and down a few times to get it to settle.

    Then I took the degree finder, and rotated the housing to exactley where I needed it. I was more concerned with caster than pinion angle... we are using CV joints on our driveshafts. So once I got the correct degree of caster, I tac welded the spring perches into place, unbolted the axle, and then welded them completely on. Its a pretty simple process... and your caster/pinion angle will be perfect.

    I hope this helps!

    Yogi
     
  4. CAROLINAK5

    CAROLINAK5 1/2 ton status

    Joined:
    Aug 2, 2001
    Posts:
    242
    Likes Received:
    0
    Location:
    lexington, north carolina
    that helps me with my second question. but back to my first question....reworded (is that a word?lol)
    how do i determine how the pinion angle should be in relation to the transfer case? i have a 4" lift that currently has shims under the springs. i'm having to build new spring pads due to fact that my 14 bolt is from a van and has the wider wheel base. so positioning the axle is no problem, i just want it to be right.
    thanks for the advice so far...now let me have some more PLEASE[​IMG]!!!!



    when all else fails..............HIDE!!!!!!!!!!!!!!!!![​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/albun32>http://coloradok5.com/gallery/albun32</a>
     
  5. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

    Joined:
    Mar 5, 2001
    Posts:
    15,684
    Likes Received:
    1,392
    Location:
    642 Days to BB2018
    YES.....and to jump on this thread with a question I've had for a while:

    Where do you actually place the angle finder? Is it as simple as measuring the driveshaft angle, or do you need to unbolt the U-Joints and measure ACROSS the "U-Joint" holder thingie? [​IMG]

    Also, I assume this all has to be done on VERY level ground?




    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  6. Yogizcoma

    Yogizcoma Registered Member

    Joined:
    Dec 14, 2001
    Posts:
    8
    Likes Received:
    0
    Location:
    Chandler, AZ
    Well... for pinion angle... if your not running a cv type driveshaft... the flange on the tcase and pinion should have the same angle. If not... you will get vibrations.

    As for where to put the degree finder... just remove the driveshaft and ujoints and place the degree finder on the yoke ("u" joint holder thingy LOL) itself. (the long way) I find this to be the best and most accurate way.

    Yogi
     
  7. CAROLINAK5

    CAROLINAK5 1/2 ton status

    Joined:
    Aug 2, 2001
    Posts:
    242
    Likes Received:
    0
    Location:
    lexington, north carolina
    "u-joint holder thingie"

    well said my friend![​IMG] so...i'm not alone under this blazer?



    when all else fails..............HIDE!!!!!!!!!!!!!!!!![​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/albun32>http://coloradok5.com/gallery/albun32</a>
     
  8. BARRAZA

    BARRAZA 1/2 ton status

    Joined:
    Oct 17, 2001
    Posts:
    259
    Likes Received:
    2
    Location:
    USA
    It's easiest to visualize if you remember that the goal is for your transfer case output shaft and the axle pinion shaft to be parallel. Doesn't matter if you measure it upside down as long as you are at normal ride height. Also remember that the axle pinion will move up under power.
     
  9. CAROLINAK5

    CAROLINAK5 1/2 ton status

    Joined:
    Aug 2, 2001
    Posts:
    242
    Likes Received:
    0
    Location:
    lexington, north carolina
    so should the pinion angle be a few degrees lower than the out-put shaft? if so, how much? 1,2,3 degrees?



    when all else fails..............HIDE!!!!!!!!!!!!!!!!![​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/albun32>http://coloradok5.com/gallery/albun32</a>
     
  10. Yogizcoma

    Yogizcoma Registered Member

    Joined:
    Dec 14, 2001
    Posts:
    8
    Likes Received:
    0
    Location:
    Chandler, AZ
    No.. they should be the same!
     
  11. CAROLINAK5

    CAROLINAK5 1/2 ton status

    Joined:
    Aug 2, 2001
    Posts:
    242
    Likes Received:
    0
    Location:
    lexington, north carolina
    ok....going to play right now!





    when all else fails..............HIDE!!!!!!!!!!!!!!!!![​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/albun32>http://coloradok5.com/gallery/albun32</a>
     
  12. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

    Joined:
    Mar 5, 2001
    Posts:
    15,684
    Likes Received:
    1,392
    Location:
    642 Days to BB2018
    OK.....it's called a YOKE......I feel better already! [​IMG]

    So Yogi, do the same rules apply even if you DO decide to go with a CV-Style driveshaft? That is, do you still try to get those two "yoke" measurements exactly identical.....and then adding the CV driveshaft just adds "extra goodness"....?

    "....as far as K5's are concerned......a yoke that is broke, is no joke!..." [​IMG] ....man I kill myself!

    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  13. Yogizcoma

    Yogizcoma Registered Member

    Joined:
    Dec 14, 2001
    Posts:
    8
    Likes Received:
    0
    Location:
    Chandler, AZ
    Hey... I called it a yoke first... read my message up above! LOL Just giving you a hard time.

    Actually... Im pretty sure if you have a CV driveshaft... the best pinion angle is pointing straight at the Tcase out put! I could be wrong though... but Im pretty sure Im right!

    But if you did that... you would have to rotate the knuckles because the caster would be screwed. The CV is really designed for driveshafts that have different angles and need to alleviate vibrations.

    Yogi

    Yogi
     
  14. RaisedK5

    RaisedK5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    932
    Likes Received:
    0
    Location:
    Long Beach, CA
    Theoreticaly, yes they should be the same, but in the real world, you get a little wrap in the rear, so the pinion will climb under power, so at rest it should be "down" an additional degree or two, so that when under power it climbs up to be parallel to the t-case output, This is also why when running a CV in the rear you don't point the pinion exactly at the T-case, but down a degree, it climbs up to be in line with the shaft under power, But thats with a real engine in a real truck, maybe its different in an import??

    Leland aka RaisedK5

    "Of all the things I've lost, I think I miss my mind the most!"
    "Are the voices in my head bothering you?
     
  15. BARRAZA

    BARRAZA 1/2 ton status

    Joined:
    Oct 17, 2001
    Posts:
    259
    Likes Received:
    2
    Location:
    USA
    Depends, leaf springs can sometimes twist a lot under power, and the angle can shift as the suspension moves. Drag cars can make big changes on how the suspension hooks by changing pinion angle but on our trucks it is a moot point. BTW the vibration is caused by the shaft velocity change as it rotates, equal angles at both ends cancel out the effect.
     
  16. Yogizcoma

    Yogizcoma Registered Member

    Joined:
    Dec 14, 2001
    Posts:
    8
    Likes Received:
    0
    Location:
    Chandler, AZ
    &lt;&lt;But thats with a real engine
    in a real truck, maybe its different in an import??&gt;&gt;

    Gee.. I give a little helpful information and leave it to somebody to enter with his brilliance.

    Anyway... What Raisedk5 is saying is true.. but you also have to look at the springs and other setup that you are running. If you have really soft springs I would offset by a couple of degreees, if you have stiff springs or trac bars I would set them equal.

    I always run CV joints... because they always make up for the difference in angles when flexing or your suspension is going through its motions.

    Yogi
     
  17. RaisedK5

    RaisedK5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    932
    Likes Received:
    0
    Location:
    Long Beach, CA
    Aww come on, I'm just teasing! You gotta expect smart ass comments like that on the K5 board. I'm just pokin' fun.

    Leland aka RaisedK5

    "Of all the things I've lost, I think I miss my mind the most!"
    "Are the voices in my head bothering you?
     
  18. Yogizcoma

    Yogizcoma Registered Member

    Joined:
    Dec 14, 2001
    Posts:
    8
    Likes Received:
    0
    Location:
    Chandler, AZ
    Ok... cool... I guess people can get misunderstood real easy. Usually somebody inserts a "LOL" or :) at the end of a comment if they are teasing. I did not see that in yours! But I can handle a little rib poking! LOL

    And my truck is not just an import... Its made in American in Freemont, CA. Im running a Jeep axle, chevy brakes, Ford shock towers, chevy knuckles, Alcan (american) springs ect ect ect. :)



    Yogi
     
  19. CAROLINAK5

    CAROLINAK5 1/2 ton status

    Joined:
    Aug 2, 2001
    Posts:
    242
    Likes Received:
    0
    Location:
    lexington, north carolina
    can i change the pinion angle on the front 10 bolt?
    what is this cv axle you guys are talking about?



    when all else fails..............HIDE!!!!!!!!!!!!!!!!![​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/albun32>http://coloradok5.com/gallery/albun32</a>
     
  20. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

    Joined:
    Mar 5, 2001
    Posts:
    15,684
    Likes Received:
    1,392
    Location:
    642 Days to BB2018
    Yogi's right.....Fremont, CA is the next town (city) over from me. They build LOTSA Toyota's there.....

    I guess that makes them 'somewhat' American.... [​IMG]



    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     

Share This Page