Drivetrain and Rear Axle Enhancements
2:04
55:11
152.2K views
At 2:04 in
The Birth of a Legend: NASCAR's Early Days and Pioneers (Bill Blair Jr's Personal Museum)
What happens here
The video describes an early 'quick change' rear end, which allowed for rapid gear ratio changes for different tracks, using different sized sprockets. Unlike modern quick changes, this unit would weld the differential to create a 'spool' for maximum traction, eliminating differential action. Hubs were also modified with floater hubs for additional strength. These modifications were crucial for adapting to diverse racing conditions and ensuring reliability under extreme stress.
Goal: Explore specialized drivetrain modifications for racing performance and durability.
Tools and materials
- Floater Hubs — Enhancing the strength and durability of the rear axle assembly
- Quick Change Rear End — Allowing rapid gear ratio changes for varied track conditions
- Welded Differential — To create a 'spool' for maximum, constant power delivery to both rear wheels
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What they say
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