Pinion angle?
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TECH Apprentice
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From: Mansfield, TX
Pinion angle? Been reading the stickies and I am more confused as ever. My drive shaft anle is 10 and my pinion angle is 0, so I am assuming I have 10 degrees of + pinion angle. I also read to set the pinion to -2 degrees but if the car isnt perfectly level how can that work?? Can this cause a really bad shudder when taking off? I installed an adj. tq arm, clutch, rebuilt engine, and LCA's all at the same time so I dont know if it is the tq arm or clutch
If you have 10-degrees of driveshaft angle, it sounds like you have your rear suspension unloaded. The rear axle must be at ride height. Even if you're parked on a ramps the angles will cancel each other our to compensate for the angle of the ramps - so no worries there.
You'll need to load the rear suspension and place the angle finger near the pinion on the driveshaft. Write that measurement down. Then, place the gauge on the flat torque arm bracket on the rearend. When added together, you should come up with something in the neighborhood of -2 as a good starting point.
However, if you're not experiencing any drivetrain vibration right now, I wouldn't mess with it because that's all pinion angle is adjusted for.
- Kevin
You'll need to load the rear suspension and place the angle finger near the pinion on the driveshaft. Write that measurement down. Then, place the gauge on the flat torque arm bracket on the rearend. When added together, you should come up with something in the neighborhood of -2 as a good starting point.
However, if you're not experiencing any drivetrain vibration right now, I wouldn't mess with it because that's all pinion angle is adjusted for.
- Kevin
Noticed you said your car shutters. That sounds like clutch chatter to me. Only in a wildly extreme case would an incorrect pinion angle be felt from a stop. It's usually felt between 60-80mph.
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TECH Apprentice
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From: Mansfield, TX
I have the suspension completely loaded right now, rear is sitting on jack stands under the axle tubes and the front suspension is on the control arms. I measured 10° on the drive shaft and 0° on the flat of the TA bracket. I am thinking the shudder is clutch related but seeing my pinion was pointed at my back seats I wasn't sure. Thanks for the reply
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From: Turnin' Wrenches Infractions: 005
Pinion angle and rear suspension bind will cause acceleration shutter. I've had it before. Have you recently work on or changed/disconnected any of the rear components?
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TECH Apprentice
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From: Mansfield, TX
Here is what I did all at once: Rear tubular lower control arms, Spohn Adj TQ arm, stage 3 TDP clutch, rebuilt the 6.0 in it for much more power. As of now I am at -2 on my pinion and +5 on my drive shaft so that puts me at -5 if I am did this correctly. Problem is as I bring my pinion closer to 0 the farther away the drive shaft gets. I assume that the oil pan is parallel to the crank within reason giving it is a machined surface(rails) and is critical for maintaining block rigidity and I am reading 0 Degrees on the oil pan. SO according to madman I say **** the shaft and point the pinion 2* down and let it ride?
https://ls1tech.com/forums/drag-raci...ion-angle.html
https://ls1tech.com/forums/drag-raci...ion-angle.html
I have the BMR adj torque arm....and i just want to double check...
so whats the pinion suppose to be set at....with strano springs?
and whats the best way to do this?
with just jack stands
so whats the pinion suppose to be set at....with strano springs?
and whats the best way to do this?
with just jack stands
This my contradictory to popular demand but it works. This is a conversation MADMAN and I had over 4 years ago. My car is a 3300lb street car that cuts 1.33 60fts while slightly toting the tires. Trust me, it works.
Originally Posted by Carter01
MADMAN, I've been reading several of you posts on pinion angles and I want to make sure I'm clear. "Set the car at ride height" Do you mean like on a drive on lift? "Set your angle finder on the pinion yoke and set the pinion 2 degrees down" So with the angle finder located on the yoke just twist the adjuster until it reads neg 2 degrees? I have to put things in simple terms! Any help would be greatly appreciated.
Thanks,
Andy
MADMAN's answer : You got it.
MADMAN, I've been reading several of you posts on pinion angles and I want to make sure I'm clear. "Set the car at ride height" Do you mean like on a drive on lift? "Set your angle finder on the pinion yoke and set the pinion 2 degrees down" So with the angle finder located on the yoke just twist the adjuster until it reads neg 2 degrees? I have to put things in simple terms! Any help would be greatly appreciated.
Thanks,
Andy
MADMAN's answer : You got it.
Anytime the position of the rearend is altered, you risk changing the driveline angle.
