Across
1. Piston oil-control or ____ ring
5. Certain semis
8. Transmission ____ shaft
9. Shop tool, belt ____ gauge
10. Upmarket auto-upholstery material
11. ’70s ad "Baseball, hot dogs, ____ pie and Chevrolet"
12. Tire-shop machine (5,8)
15. Word following drive and valve
17. Willing crash-test participants
20. Radio adjunct in auto glass, often
21. Axle windup under acceleration
22. Zig-zag road section, slangily
23. Makes an electrical connection, in a way

Down
1. Unfortunate oil-tanker event
2. Second R in repair-order R&R
3. Inner-tube repair
4. Disc-brake rebuild parts (6,3,4)
5. State with "Big Sky Country" plates
6. Install a wiring terminal, in a way
7. Planetary gearset’s central element (3,4)
12. Auto-bulb specification
13. Bonded or riveted drum-brake parts
14. Automotive A/C type, ____ control
16. Certain transmissions, briefly
18. Pedal to the ____, a.k.a. full throttle
19. Grip-enhancing tire-tread slits