beedo

iTrader: (28)

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

stroked383HSR

iTrader: (12)

hmmm......Ive been wondering that myself. specially on a lowered car

BMR Tech2

iTrader: (5)

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

BMR Tech2

iTrader: (5)

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.

beedo

iTrader: (28)

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

SpinsB

iTrader: (5)

so is this pinion angle good or no??

beedo

iTrader: (28)

I don't know yet, I haven't driven the car yet. I will update as soon as I do drive it

01ssreda4

iTrader: (96)

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?

beedo

iTrader: (28)

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

stroked383HSR

iTrader: (12)

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

Carter01

iTrader: (11)

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.

stroked383HSR

iTrader: (12)

on a lowered car?

and what if a person has no drive on lift?

beedo

iTrader: (28)

Stroked, I am pretty sure you set the pinion angle the same if the car is lowered or not

stroked383HSR

iTrader: (12)

no no...ive read somewhere the pinion changes when the car is lowered.

BMR Tech2

iTrader: (5)

Anytime the position of the rearend is altered, you risk changing the driveline angle.

Fasrnu

iTrader: (6)

Pinion angle does change when you lower the the car....but stock height or lowered the angle needs to be about the same on most manual trans setups i have built -2 or -3 works great