Shackles and pinion angle

[goochieman83]

Just out of curiosity, does shackle length affect pinion angle. I am rocking some 6" shackles and would like to drop down to about 2-3" and add a leaf or get new rear springs. I believe I read that longer shackles rotate the nose of the pinion upward.

 

[Bent77]

Correct. If you want to do some trigonometry, you can find the angle difference

 

[goochieman83]

Ok, I have the diy4x shackle flip in the rear, what length are stock shackles? If I get new springs I don't want to have it too high/low in the rear.

 

[Bent77]

Ok, I have the diy4x shackle flip in the rear, what length are stock shackles? If I get new springs I don't want to have it too high/low in the rear.

I would PM Cyberfire (he is DIY4x) here on the board, he can get you the best idea what springs/shackles/lift is going to work with your plan.

 

[goochieman83]

Cool, didn't know that. Thanks