Hey, would y’all remind me how the Stock Dana 30 front axle pinion angle and Front transfer case pinion angle Should be Relative to each other. I’m pretty sure my pinion needs to be up about 4 deg. I have a 4” suspension lift. Thanks
Dana 30 pinion angle
- Thread starter Eddie Greenlee
- Start date
Dana 30 aligned with the driveshaft, transfer case ignore. Obviously that's a simplification but the DC is on the transfer case so that's the basic idea.
What is your current pinion/ds angle? 1 degree high is ideal but not always practical.
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Axle Pinion angle is about 5.5. Not sure about Transfer case pinion angle because I can’t get an angle finder up in there
It doesn't matter, like @Alex01 said, the angle between the driveshaft and Dana 30 is what you need to worry about.
No need to measure its actual angle. Of the caster angle and pinion angles, the one that takes precedence is the pinion angle and how it meets the driveshaft.
While this is showing the rear axle, this is exactly how your front axle should be set up too since the front driveshaft has a double-cardan (aka CV) joint at the end closest to the transfer case.
Getting the caster angle dialed in is pretty much create as much caster angle as you can until the front driveshaft u-joints start complaining by vibrating, then back off on the angle until the vibrations completely stop.
While this is showing the rear axle, this is exactly how your front axle should be set up too since the front driveshaft has a double-cardan (aka CV) joint at the end closest to the transfer case.
Getting the caster angle dialed in is pretty much create as much caster angle as you can until the front driveshaft u-joints start complaining by vibrating, then back off on the angle until the vibrations completely stop.
Thanks for correcting that. Fixed...
The front pinion is very forgiving when it comes to pinion angle. For example I'm about 6 low 9.5/15 and I don't have any vibrations. Follow Jerry's advice and you'll be golden.
Awesome
my drive shaft I’d sitting at 10 degrees.
my pinion ( measured on top of housing above the pinion) is 5 degrees.
So looks like I need to adjust my lower control arms!? Till my pinion angle and drive shaft angle match ???
As you rotate the pinion your driveshaft angle will decrease. If it was me I'd move the pinion to around 7-7.5* and remeasure.
Dab of paint is a great idea, I did the same on the savvy midarm arms. One of the reasons I loved my MC arms was because I would use the hexagonal sides as reference points while adjusting.
Not sure about the Currie/Savvy arms but MC arms are a 1/16" per one rotation. When I adjust, I just make sure I rotate each arm the same number of revolutions. My arms are still square.
Double check your pinion angle by putting your angle finder on one of the flats on the front of the pumpkin. Subtract from 90*.
I use some 1" diameter magnets on the u-joints then set the angle finder on the magnets. It works pretty well reading the differential or drive shaft angles depending on what you're looking for. You just nip the edge of the magnets to clear the u-joint clips. My front shaft if off by about 1.5 degrees but my caster is still in spec and I have no vibration issues.
An angle finder will measure the pinion angle directly when held against the flats as shown. No need to subtract from 90 degrees.
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