Ford 4.20 Rear Gear Ratio?

[Dock Dog]

Originally Posted by quickford1

I would recount that ring gear, nascar runs a 422&a 430 never heared of a 420.
Rich

I counted it 10 times and it always came out to 42-10. I always divided the pinion into the ring gear and it came out to 4.20. I talked to a guy at Richmond Gear and he said their were some Nascar teams using this 4.20 ratio. I think I know how to count, a least I thought I did.