differential service

4. semi-circular instrument used to measure angles
6. a crown and pinion are a __________ set
8. oil that requires more frequent service intervals
11. measure of a fluids resistance, how runny or thick a fluid is
14. stubby shaft with helical gear teeth that mesh with ring gear
15. as a crack continues to grow, this mark design is formed in the fracture pattern
17. catastrophic failures that result from excessive torque applied to a shaft or beam
21. film on moving parts, cool components from friction, suspends dirt and particles
22. failures identified by cracked, pitted, or spalled tooth surfaces
23. original cause of failures
24. a failure that isn't immediate

1. lube that extends service intervals and adapt better to temperature extremes.
2. the intermesh contact surfaces between a pair of mating teeth
3. when oil level is at proper level it is at the bottom of this
5. tool to measure back lash and end play
7. large helical gear attached to a carrier
9. looking and checking components for wear
10. amount of movement between ring and pinion gears
12. smaller gears attached to a cross that provide the differential action
13. failure generally caused by over-loading beyond rated capacity or abusive handling over rough terrain
16. plug on the bottom of the carrier
18. failures that result from old age or excessive wear
19. a failure caused but a sudden application of force
20. failures result from shock loading when a spinning wheel’s motion is suddenly arrested or by lubricant throw-off from rotating components.