How hard/expensive is it to switch out gearing on an A-body?

ir3333 said

oh boy...i have changed 3 on my own newer vehicles.
Go to any dealer and check his scrap bin and you will find many replaced weekly.

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i don't know.. my car has the same green bearing in it since the mid 90's. car was used as a daily driver for years then beat the hell out of on the street and drag strip, then it was set up for corners and driven a ton more like that.. green bearings still going strong.