Quote:
Originally Posted by Mark Ugrich
I have a set of 6.20 gears I installed recently. As far as I know most NASCAR gears are made by Gleason and new are in the $2000.00 range.Gleason only makes gears in 9310, which is the same as a pro gear.
There were no pinion depth markings or numbers to go by, so it took a little work to get them right.I got the depth close, then used the comet tail on the pinion to dial in the pattern.
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Gleason figured out how to make 9310 gears live in NASCAR. They grind the gears as I understand it. GM bought the first 2 years of production so their teams had a exclusive for those 2 years.