Pinion angle adjustment with 1" drivetrain lift
#1
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Pinion angle adjustment with 1" drivetrain lift
Is it necessary for me to change my pinion angle when I install my new BudBuilt 1" drivetrain lift crossmember? If so, then what degree shims do I need. I checked 4Crawler's site and saw that he has the shims available. Bud told me that the 1" DT lift wasn't a problem on my truck because pinion angle is easily adjusted. I'm guessing there's probably a cool mathematical forumula I could apply or maybe a real big protractor. What do you think?
Edit: Oops, please excuse me while I go read Roger's site a little more carefully! He's got a FAQ section I didn't see at first. Hmmm . . . . do I need to worry about the front pinion angle too?
Edit: Oops, please excuse me while I go read Roger's site a little more carefully! He's got a FAQ section I didn't see at first. Hmmm . . . . do I need to worry about the front pinion angle too?
Last edited by Snorkeldepth; 04-06-2006 at 11:24 AM.
#2
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I would link you proablly dont have to worry about it, but if you do its just a small shim under the rear leavel. If you have the stock shock setup you should be able to go up to 6 degrees, but I doubt you need more than 2 if any.
As for the front, your still running IFS right, I wouldnt worry about..
As for the front, your still running IFS right, I wouldnt worry about..
#4
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Is it necessary for me to change my pinion angle when I install my new BudBuilt 1" drivetrain lift crossmember? If so, then what degree shims do I need. I checked 4Crawler's site and saw that he has the shims available. Bud told me that the 1" DT lift wasn't a problem on my truck because pinion angle is easily adjusted. I'm guessing there's probably a cool mathematical forumula I could apply or maybe a real big protractor. What do you think?
Edit: Oops, please excuse me while I go read Roger's site a little more carefully! He's got a FAQ section I didn't see at first. Hmmm . . . . do I need to worry about the front pinion angle too?
Edit: Oops, please excuse me while I go read Roger's site a little more carefully! He's got a FAQ section I didn't see at first. Hmmm . . . . do I need to worry about the front pinion angle too?
http://www.4crawler.com/4x4/CheapTri...l#Measurements
And if you want to pre-figure the angle change (with an uneven drivetrain lift), dig out your old trig book. Simply measure the horizontal separation between the pair of motor mounts up front and the tranny mount in the rear. Then just divide that into the lift height difference (end to end) and take the inverse tangent (arctan) of that ratio. At about 44" more or less between those points, you get about 1 degree angle change per inch of uneven lift. As far as the front angle change, not a lot you can do about that on IFS since the diff bolts to the frame. Only issue would be some vibration during high speed 4WD operation.
Last edited by 4Crawler; 02-29-2008 at 08:31 AM.
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