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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

What they say

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hill claro had a place called the spot so that's the guys that was prominent in your moonshine business what kind of car was he using when he was running moonshine well he started out with 32 Ford and he later on he went to 44 had 30 had several 39s um is that what any of these are I'm not I'm not literate enough in this area we had one exactly like this this is a very rare color brown 39 standard that's only the second one I've ever seen in my life he had one H Li we made a race car up finally and tore it all two pieces I got a picture of it what would they modify to do that kind of stuff you would put helper spring Lea at the rear to get set a little higher you put bigger tires on the rear some of them did but then run his pretty much stock he put a extra spring lifa to under the back of it and that's about all he did to it but I mean he was an early on guy you know and then they put two carrers on them I'll show you one up here but see uh well this this car here just to give you an example it started out being 85 horse well next thing you would do get on a horow you put the El roock heads on as you see down in there then the next thing you would do is get you a molic supercharger see that thing on top of

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