I'm looking to find out what gear ratio is in my blownout rearend. It' the differential that's blown, but when I go to a wrecking yard, they want to sell me the whole rearend, not just the differencial, and I'm thinking I can replace the differential with the same amount of labor. How can I calcutlate the ratio from the numbers stamped on the ring gear? There is no tag on the housing cover bolt.
Year : 1996Make : FordModel: BroncoEngine: 351
Hello and Thank you for choosing Just Answer.
The only thing you can do since the tag is not on the cover any longer, is to count the number of teeth on the ring gear, and count the number of teeth on the pinion gear and then divide the two numbers to get your ratio.
So Ford put an indiscriminate number of different ratios into every truck they built, and didn't make any wy to track them by VIN or Serial # ?
Yes, you can track the axle by V.I.N but I though you were just referring to an axle laying on the ground at a junkyard. You will have to look at the certification label on the drivers door and it will give you the axle code.
The axle code is " H9 "
H9 should be 3.55 Limited Slip
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