Pinion Angle
08-01-2013, 11:49 AM
#1
Pinion Angle Been trying to figure this out.
Car is on car ramps, front of car alittle higher than rear.
Taking measurements from the passenger side.
The driveshaft is angle down from the front to the rear.
Protractor said 7*
The rear end is angle up from the back to front.
Protractor said 5*.
So what is my pinion angle?
Car is on car ramps, front of car alittle higher than rear.
Taking measurements from the passenger side.
The driveshaft is angle down from the front to the rear.
Protractor said 7*
The rear end is angle up from the back to front.
Protractor said 5*.
So what is my pinion angle?
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08-01-2013, 06:02 PM
#10
you are at +2 with the driveshaft at 5 and the pinion at 7. You need to roll the pinion down a bit and aim to hit -1.7 or 1.8. 2 degrees will more than likely cause vibes and not get you any better performance. You also need to check the angle of the crank centerline as well, and try to get it as close to the pinion angle as possible(in parallel). You will most likely find you need to raise the transmission off the crossmember to achieve this.
08-01-2013, 06:05 PM
#11
I played with this alot on several cars... What I can tell you is when the car is loaded at ride height, the trans output, and oil pan are usually about level (chassis rake puts it here) and the rear was level with the ground, or down 1 degree from level. To me this, puts the rear at 0 to -1.
Never worried much about this, as long as the driveshaft ujoints are not wearing prematurely it really doesn't make much of any difference on a rod ended suspension equipped 4th gen car. Rear won't wrap like a leaf spring car, so as long as you don't have a driveline bind its fine... Pinion angle does not effect traction
Never worried much about this, as long as the driveshaft ujoints are not wearing prematurely it really doesn't make much of any difference on a rod ended suspension equipped 4th gen car. Rear won't wrap like a leaf spring car, so as long as you don't have a driveline bind its fine... Pinion angle does not effect traction
08-01-2013, 06:20 PM
#12
I played with this alot on several cars... What I can tell you is when the car is loaded at ride height, the trans output, and oil pan are usually about level (chassis rake puts it here) and the rear was level with the ground, or down 1 degree from level. To me this, puts the rear at 0 to -1.
Never worried much about this, as long as the driveshaft ujoints are not wearing prematurely it really doesn't make much of any difference on a rod ended suspension equipped 4th gen car. Rear won't wrap like a leaf spring car, so as long as you don't have a driveline bind its fine... Pinion angle does not effect traction
Never worried much about this, as long as the driveshaft ujoints are not wearing prematurely it really doesn't make much of any difference on a rod ended suspension equipped 4th gen car. Rear won't wrap like a leaf spring car, so as long as you don't have a driveline bind its fine... Pinion angle does not effect traction
Wow... seriously?
08-01-2013, 06:32 PM
#13
Yep. Once chassis height was set to distribute weight where I wanted it on the last 3 cars I did engine/trans ended up level with ground... Pinion angle at level or a degree down worked fine for me. Tried moving it 2 degrees in both directions with no change.
Rod ended suspension does not deflect like leaf spring cars which need it to keep the driveline strait under hard a acceleration, no need to crank pinion angle in to compensate for something the car does not see.
Rod ended suspension does not deflect like leaf spring cars which need it to keep the driveline strait under hard a acceleration, no need to crank pinion angle in to compensate for something the car does not see.
