ORIGINAL: 07GT

If both your angles are negative and you shorten the LCA, you will increase the negative pinion angle. If you shorten the LCA it will pull the pinion down. Again, maybe I don't understand your explanation of your measurements, but I do understand chassis setup. I've done this a lot.

ORIGINAL: CrazyAl

DO NOT measure from the pumpkin. The Pumpkin is a cast piece and it's dimensions will not be repeatable from car-to-car.

I drew a quick sketch of where the two measurements are to be taken on our car.

The first measurement is taken on the rearmost section of the 2-pc driveshaft.

The second measurement is taken on the pinion flange. Note that you must be careful that your angle gage ONLY rests on the pinion flange itself, which is the rearward (larger diameter) part of the coupling. Make sure your angle gage does not sit crooked across both the flange and the CV joint on the driveshaft.

Please excuse the shoddy quality of the drawing, but it should suffice:



[IMG]local://upfiles/32957/3558DA15657D44289345FEED934B0946.jpg[/IMG]

ORIGINAL: moosestang


Shortening the lower control arms most definately pushing the pinion yoke up and decreases the amount of the angle. The CHE LCA's come set at the factory control arm length which is almost as short as they will go. I believe after lowering my car 1.5 inches in the rear and front my pinion angle was around zero or slightly positive. I know the drive shaft angle was zero.

ORIGINAL: 07GT

That's what I said in my 1st post, use the yoke. What we are concerned with is that it appears that the outer yoke circle appears to be machined at an angle. Is it or is it not?, my eyes are not that good. I understand how to make a pinion angle measurement, it is where to take the measurement on this particular car that is troublesome.