hollywub

I am finally up to setting my pinion angle. I have a Longacre digital finder for this job.

The driveshaft is out of the car so I can get to the flanges.

I measured the transmission flange angle and got 2.8 degrees negative (pointed down towards the back of the car.)

My measurement on my pinion flange is 2.7 degrees negative (pointed down towards the front of the car).

The car has a 1 piece Axle-Exchange driveshaft and all urethane bushings in the UCA, LCA's, pinion bushing, panhard rod. I also have it lowered 1.5" with H&R sport springs and tokico d-specs.

Here are my questions.

*** What type of suspension travel could I expect under full load with this suspension? 2 to 2.5 degrees postive?

If that is the case, I would need to make my pinion angle 4.7 to 5.2 degrees negative? -2.8 - (-2.7) = -.01 + 2 = 2.01 under load

Now adding 2.1 degrees negative to the rear pinion flange to make it 4.8 degrees negative...

-2.8 - (-4.8) = -2 + 2 = 0 under load.

*** Does this seem right to have a -4.8 rear pinion flange angle? It makes sense to me if the suspension has 2 degrees positive movement...

From what I have seen -2.8 on the transmission flange seems right.

Thanks!

908ssp

The pinion has to point up to be correct not down.


The flanges have to be parallel. Now people talk about adding 1 degree to make up torques effects but I wouldn't worry about that. If the flange is point down on the engine the flange on the pinion has to point up. And if you can't do that which is what I suspect you understand why double universal joints don't work well on mustangs. You don't need to align a CV joint.

hollywub

I am going to make this question easier...

If my transmission flange is 2.8 degrees negative and I am using a 1 piece driveshaft, what should my pinion flange angle be assuming the 2 degrees of moving in the pinion upward under load.

.8 degrees positive upward on the flange?

I am sure almost every mustang GT s197 has the same transmission flange reading or close to it...

Thanks!

hollywub

update. Pinion angle at -1.3.

no vibrations at 100 mph WOT.

Checked angles and both flanges came out to -1.4.

Then checked back of driveshaft, zeroed out gauge, put in under the pumpkin, got -1.3.

Steeda sets up their cars -1 to -2.