Awnser All for 100 points 1. Explain why cardan -type u-joints on a driveshaft must be within 1/2 a degree working angles?
2. What makes a constant velocity joint able to transmit engine torque through an angle at a constant velocity?
3. What type of grease must be used in CV joints?
4. Name two types of CV joints.
5. List two items that should be checked when inspecting a drivehaft.
6. List the steps necessary to measure driveshaft u-joint working angles.
7. Describe how to replace a cardan-type u-joint.
8. Explain the proper steps to perform when replacing a cv joint.
9. Explain how to determine a rear axle ratio without removing the housing cover.
10. Describe how to perform a ring gear tooth contact pattern test.

Explanation

What is the angle of the driveshaft.

Relative angles are IMPORTANT more important than absolute angles. You say that your trans is 1 degree off of horizontal and the rearend is 4 degrees off of horizontal. If the driveshaft is 2-3 degrees off of horizontal, then both U-joints are working at a 1-2 degree angle and they will cancel each other out, all is well. If you have one U-joint at zero and the other at three, or worse 1 the other way and 6 at the rear, your life will suck.

That reminds me, I really don't like to see U-joint angles of over 4 degrees under any circumstances. Which is why sometimes you need to point the pinion down instead of up, so the U joint angles are complementary even though the absolute angles are screwy.

The key is, you want both U-joints to be working at close to the same angle as each other.