Quick pinion angle question

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scampy

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I'm looking to lower the back of my car a little i'm wondering what change the pinion angle will do.Lets say in relation to the ground i'm 5deg pointed down and the rear will lowering raise it up to say 4deg nose down or make it go to say like 6 deg nose down,not looking for exact numbers just which direction it would move.thanks
 
My only thought is that you will have to measure the angles after lowering the car, then use shims under the axle pads to adjust the angle. I do not think that there is a way to give you an answer because each car is a little different and we do not know how far you are going to lower the car.
Good Luck
 
I doubt you'll see any significant change. Lower and and take a look. If it's pointing down I'd leave it alone.
 
The issue is you can’t just use the ground as a reference point. Pinion angle uses the relationship of the end output shaft of the transmission to the pinion yoke. So say the end of output shaft is 90 degs to the ground and your pinion yoke is 4 degs down. Then you move the back of the car down. The transmission is no longer 90 degs. You will lose some of the pinion down angle. The end of the output shaft and the yoke face will come closer to being parallel. How much? You will have to measure
 
The rear u joint angle uses the front for reference. They should be the same, in opposite directions.
 
OK guys thanks for the input but i'm just looking to see which way the pinion angle would move when lowering,i'm only lowering very little may not even move but if it does would it be from 5 down to say 4 or go the other way to like 6,thanks
 
It depends on how you lower it.
If you flip the front shackle the pinion will rotate up a bit. Raise the rear and and it will nose down...
If you use blocks I am not sure it will change at all.
 
My rear shackle is in lowest hole plan is to move it up to middle to the more "normal" length
 
It will rotate down then . And probably not enough to make a difference
 
Possible none at all. Not bein a smartass here, but honestly, how do we know? YOU have the car. YOU know how you will lower it. Not us. So the only real way to find out is to do it.
 
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