USA Standard Gear (ZG F9-389) Ring and Pinion Gear Set for Ford 9" Differential

9" Ford Ring & Pinion Gearset - 3.89 Ratio

Yukon (YG F9-389) High Performance Ring and Pinion Gear Set for Ford 9" Differential

SVL 2020621 Ring and Pinion Gear Set for Ford 9" Axle

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Ford 9 Inch Gears 3.89 Popular Q&A

Q: Ok my name is mike.have a 75 vega.back half (4-link).383 stroker ...
A: 29" is pretty much the "break even" point.meaning a 4.10 is actually 4.1 driveshaft revolutions. If you're under 29" then your gear ratio is actually even lower... Read More »

Q: How to Fill a Ford 9 Inch Rear End With Gear Oil.
A: 1. Crawl under the rear of the vehicle and locate the rear differential housing. The housing is the large "pumpkin" located in the center of the axle. 2. Locate... Read More »

Q: What is the highest gear ratio for a ford 9 inch?
A: Highest gear would be the lowest number, somewhere around 2.3:1....lowest gears would be the highest number like 6.3:1 Read More »

Q: How much gear lube does a 9 inch ford rearend hold?
A: Around 3 qts. should be enough for a 9 inch rear-end. Read More »

Q: What is the OEM rear end gear ratio on a 1979 ford F-150 400 9-in...
A: What is the OEM rear end gear ratio on a 1979 ford F-150 400 9-inch rear end? Read More »