[quote=ES_97Sport]
The front pinion isnt in line with the case or shaft.
Correct. Right now its close to horizontal - +1.1 as you have noted below.
The front differential pinion has to be inline with the drive shaft. That's it. Not the case, the shaft.
Correct. For a CV/u-joint drive shaft setup, the pinion is inline with the drive shaft. In other words, you'd be able to draw a straight line along the center line of the drive shaft and pinion, straight through both.
Looking at your diagram - if I'm reading it correctly - you need to rotate the front differential 2.3 degrees counter clockwise when viewed from the driver side.
Ive been thinking hard about this. The pinion points up at 1.1 degrees & the driveshaft then goes up 3.4 degrees from that.
You said rotate the pinio up by 23. degrees , but dont forget that as the pinion goes up then the shaft angle also decreases as they are joined together. So I reckon I only need to rotate the pinion up by 1.1 degrees , so that the pinion goes up to 2.2 & the shaft comes down to 2.3 (nearly identical).
How does that sound?
You're putting to much into the math. I am trying to keep this REALLY basic for the sake if illustration. That 2.3 degree number isn't accurate. If you really need to figure the rotation mathematically, you need ...
1) The length of the "pinion". This is the distance measured from the center line of the axle shafts to the exact center of the u-joint along the center line of the pinion.
2) The distance from the axle shaft center line to the "pinion" center line and whether the measurement is from above the axle center line or below (+/-).
3) You need the length of the drive shaft measured from the center of the pinion u-joint to the center of the Double Cardan u-joint connected to the drive shaft.
And then you need to do a lot more math than I've shown.
And it the answer still wont' be exact. I don't know what any of these measurements are so I can't begin to give you an exact number of degrees.
This is one of those things where figuring out all the math ahead of time takes more work than fixing the issue.
Edward
