I've been having a strang pop noise from the passenger side (from what I can perceive in-car) and people keep telling me it's my pinion angle. So I have the up on stands tonight, leveled to the ride height and slapped some mag angle finders on the rear differential and the front trans. Please take a look at these pics and verify that my pinion angle is within spec so I can rule this out. Front is at ~5degrees and rear is at ~2degrees.

Or please explain to me if I'm doing anything wrong.

 

what pinion angle are you trying to achieve?


for example, i wanted to achieve a -2* pinion
angle, so when i measured my transmission
output shaft at -2*, i adjusted my pinion to 0*.

 

Do you have a one-piece dshaft hammer?

 

yes sir, here is how i did mine.

http://home.comcast.net/~cookpaging/.../miscmods.html

although i measured at easy convenient places,
i think you still should be able to measure somewhere
even with your ds installed.

 

I have been researching his lately & there are many opinions as to the correct way (or maybe there is more than 1)

I like this article & I think I will use method 2. With a one piece shaft you ideally want the pinion & trans flanges paralell under load. The neg # down is used to account for axle wind up. He uses different numbers for different setups depending on how stiff they are. Measuring off the balancer should be the same as the trans flange or ther bell housing. You can also do it by comparing driveshaft to pinion flange & driveshaft to transmission flange angles then putting in the required neg for your setup. The result should be the same. I bought a digital torpedo level at sears today on sale for $24.99. It can read in degrees & can be zeroed to compare angles. Here is my plan, car with suspension loaded of course, put level on balancer on front of engine & set that to 0 no matter what it is, then I will place a square on the bottom of the rear housing & place the torpedo on it, a setting of 0 should be paralell & -2 down should be good. You could do the same thing with your angle finder in the same places, just a little more math with out the zero function.

This is my plan and is subject to change if anyond has better ideas. It just seems simple.

http://www.baselinesuspensions.com/info/pinionangle.htm

 

I don't have ANY vibration problem, just a pop, click noise and now that I'm well under-car I see some marks on my driveshaft. I don't think it's angle problems but clearance problems. Getting some photos of those now.

 

I think I'm going to have a shop put my car on a chassis lift. I don't see anything but hit/miss with jacking the rear and guessing.

 

cool, we like photos

 

This mite help you too. Video on it.

http://allfordmustangs.com/forums/20...ion-angle.html

 

well don't leave us like this....take some
pics of the tires or something.....