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Pinion Angle

This is a discussion on Pinion Angle within the Drivetrain forums, part of the LSx Technical Help Section category; I just want to make sure I did this correctly. With the car on its wheels and the suspension settled ...

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    Pinion Angle

    I just want to make sure I did this correctly. With the car on its wheels and the suspension settled (bounced the car a few times and let it sit for a bit) I used a digital level on the driveshaft and the bottom plate on my torque arm at the differential. The driveshaft points down 2.4 degrees, so -2.4. The rear points up 0.9 degrees after adjustment, so +0.9. Adding the two numbers yields negative 1.5 degrees. Did I do that right?





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    Rockin the Ruckus! 02Sweet's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Did I do that right?
    From everything that I have read, Yes you did.....but I would like a confirmation from someone else too

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    That's what the directions said with my BMR adj TA.

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    If your shaft is running 2.5 at the pinion, then you want the pinion at/between +.5 to +1.

    Then when you are under load it will probably take out another 1. (tq arm equipped) and be close to 0 which is the non hp robbing angle you want.

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    That is how I understand it also Jeff. As mentioned above, under load, theoretically you want the angle to be 0 degrees. Most common is set at about -2 from what I've read.

    Here is some more info about it. http://www.carcraft.com/howto/91758/index.html

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    Quote Originally Posted by 35th-ANV-SS View Post
    That is how I understand it also Jeff. As mentioned above, under load, theoretically you want the angle to be 0 degrees. Most common is set at about -2 from what I've read.

    Here is some more info about it. http://www.carcraft.com/howto/91758/index.html

    Thanks Jon! This thread had not received many responses and I wanted some assurance that I did it right. I subscribe to Car Craft, but that article you linked was published too long ago for me to remember it.

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    You did it right.

    2 degrees is the safe standard.
    When tq arms are added or link style or ladder style depending on bushing deflection you could take some more out.

    Some 4 links and similar suspensions can dial in less maybe 1. or .05 with solid links
    I don't have much experience with the tq arm gm's to say you could take some more angle away.

    But that is right just like you have it.
    I deal with this everyday if it makes you feel better.
    .

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    Quote Originally Posted by Supershafts View Post
    You did it right.

    2 degrees is the safe standard.
    When tq arms are added or link style or ladder style depending on bushing deflection you could take some more out.

    Some 4 links and similar suspensions can dial in less maybe 1. or .05 with solid links
    I don't have much experience with the tq arm gm's to say you could take some more angle away.

    But that is right just like you have it.
    I deal with this everyday if it makes you feel better.
    .

    Thanks! Always good to have confirmation.

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