Gear ratio?
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Laughing Gas
Joined: Feb 2004
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From: Maine
Gear ratio?
I've done a search and haven't had any luck finding a definitive answer. I own 2 2000 Excursions. Both are 4x4 Limiteds with the V10. Both have the door jamb stickers but no axle code. The metal tags on the rear axles are rotted or missing. One was made in late 99 and the other early in 2000. Any way to determine gear ratio? One has 285's and the other has 305's.
Senior User
Joined: Jun 2015
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From: Littleton, CO
The axle code should be on the door sticker.
Or jack up the rear (or front). Mark the wheel and mark the driveshaft. Spin one or the other and count how many each rotate. The driveshaft will rotate 3.55 times for a single tire rotation for 3.55 gears. 3.73 times for 3.73....... And so on.
Or jack up the rear (or front). Mark the wheel and mark the driveshaft. Spin one or the other and count how many each rotate. The driveshaft will rotate 3.55 times for a single tire rotation for 3.55 gears. 3.73 times for 3.73....... And so on.
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From: Media PA
I've done a search and haven't had any luck finding a definitive answer. I own 2 2000 Excursions. Both are 4x4 Limiteds with the V10. Both have the door jamb stickers but no axle code. The metal tags on the rear axles are rotted or missing. One was made in late 99 and the other early in 2000. Any way to determine gear ratio? One has 285's and the other has 305's.
It seems many of the early builds don't have the axle codes shown on the stickers, I don't know why though.
You gave two different tire WIDTHs, that won't change the RPMs at a given speed, tire HEIGHT will. There are online calculators that can help figure out the ratio with a know tire height and a known speed and RPM. Something like this can be used if you don't want to do the tire/drive shaft counting like ExplorerTom suggested. Calculate GEAR, RPM, MPH, TIRE DIAMETER
Do they both seem to have the same performance characteristics? Or does one seem a little quicker/more powerful than the other?
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