Ford Mustang Forum - View Single Post - Lower Control Arms--To be adjustable or not to be
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post #18 of (permalink) Old 04-02-2016
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PMDmustang13's Avatar
Joined: Jun 2012
Location: Omaha
Posts: 1,653
Originally Posted by 5LHO View Post
It ain't as much about phase as it is about ensuring enough down angle so that when the pinion gear tries to climb the ring gear under hard acceleration, it doesn't push the pumpkin into an up angle situation, which will trigger wheelhop. 3 links like these don't need alot here, 2 degrees down max on a street car, compared to a leaf spring rear, which will need 7 or 8 degrees down to compensate for the spring wrap up.
I just want to make sure that I understand you correctly. When you say down angle are you referring to the pinion flange specifically pointing downward or are you referring to the relative angle of the pinion flange relative to the transmission flange? Not sure if I am making sense with my question.

On my car and with most other S197's as far as I know the transmission flange points down. Under hard acceleration the intent is to have the transmission flange and pinion flanges at the same angle to be in phase. (Others may say under normal driving you want the angles to be equal to be in phase). Thus for my car's driveline to be in phase the pinion flange will need to be pointed upward. And if I want it to be in phase during hard accelleration is needs to be rotated CCW -1 to -2 degrees(View from Driver's side and variable depending on bushings etc.) so that under acceleration the pinion flange rotates CW.

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