ChevyNo1

OK, maybe I don't know what I'm doing!! Everyone tells me that it should point *down* a couple of degrees. When you say point down, does that mean in relation to the driveshaft, or to the ground when it is just sitting there? I assumed it meant to the driveshaft, and did it that way, but when I look under the car, it appears as if it's pointing up ( which would explain why I still have wheelhop ). Anyone???

- Dug

DanZ28

iTrader: (5)

So, it should be -2 or 3 degrees from what ever the drive shaft angle is, correct?

ChevyNo1

That's my take on it . . .

- Dug

DanZ28

iTrader: (5)

Good, that's how I did mine <img src="gr_stretch.gif" border="0">

MacGyver

iTrader: (5)

Here's how I understand to do it. And how I set my Spohn up.

Put the angle finder on the driveshaft near the rear u-joint. Measure the angle (mine was 3 degrees to the left on the angle finder). This is the driveshaft angle. Remember that angle. Next take the angle finder and put it on the Tq arm mounting plate and read that angle (mine was 5 degrees to the right). This is the pinion angle. Now you subtract the pinion angle 5 from the driveshaft angle 3 and you get -2. Voila your pinion angle is set. You're only looking for the difference in the two angles.


L8r

Colonel

Really, I wouldn't go anymore than -3 degrees. To harsh on the joints and causes vibration. On these cars more pinion angle just really doesn't make that much (if any) difference in traction.

I think -2 is plenty.

y2khawk

iTrader: (5)

I've always understood it as the relative angle between the DS and the pinion. And that negative is the direction you want to go. So, if you imagine the driveshaft and the pinion forming a V, the point of the V should be toward the ground.

I run -3 all the time <img src="gr_stretch.gif" border="0">

also, i've noticed a signifcant improvement in wheel hop by softening the HAL's 1 click in the back. Just a thought if you have adjustable shocks

BTW, moving to drivetrain

ChevyNo1

OK, I definitely did it wrong then, that's what I thought. Thanks!!

- Dug

Black LS1 T/A

y2khawk, is right.

Also, you should not exceed 4.5 Degrees of pinion angle.

ChevyNo1

I should have known better . . . but hey, everyone has to learn a first time, right?? <img src="gr_images/icons/wink.gif" border="0">

- Dug

Black LS1 T/A

BTW... The V-shape (V pointed down) is a positive pinion angle.

Positive Ponion Angle refers to the degrees of downward tilt of the pinion as compared to the driveshaft. The stock angle may be zero degrees or even a negative angle.

Normally you should check the angle of the drive shaft, then check the angle of the differential at the machined surface on the pinion yoke (must be parallel to the pinion shaft). The difference of the two readings is the pinion angle.

Skelton

I agree with -1.5-2.0 at the most.