speedo gear for 32s | Ford Explorer Forums - Serious Explorations

  • Register Today It's free!

speedo gear for 32s


November 17, 2002
Reaction score
City, State
Year, Model & Trim Level
94 xlt
Well last week I did the tt and shackels this week I got my 32s ats. Anyone know from presonal experience what gear I need for my speed sensor? I went from 225s to 32s . Looks great ..not a soccermom ride anymore lol.Thanks for the encouragement to go 32s almost did 31s. Wheww!

Join the Elite Explorers for $20 each year.
Elite Explorer members see no advertisements, no banner ads, no double underlined links,.
Add an avatar, upload photo attachments, and more!

what gears are in your axle?

What gear is in your t case now?

Its not a simple answer, it varies. You can do the math.

I believe the calculation is still on therangerstation.com

I am guessing 19 or 20 tooth depending on what gear ratio you have in your diff

Use the Ford Motorsport formula:

Driven Gear Teeth = (Drive Gear Teeth x Axle Ratio x Tire Rev. Per Mile) / 1000

There are 7 teeth on the gear in my BW1354 (and since the speedo worked fine with my 4405, I'll assume there's 7 teeth on that gear too). You can find the tire's revolutions per mile under the "Specs" link on TireRack.com. From there it's simple math:
? = ( 7 * your axle ratio * 677 ) / 1000

I have a ScanGauge and the speedo and SG readout are almost identical. There are 32" BFGs on my Ex, too. However, I have 4.10 axles. This is the formula I used.

Thanks Bronco this works out good Im putting in 4.10s next week. 7teeth sounds right . thanks again

7 is the number of teeth on the gear inside the transfer case. With 4.10 axles, you'll need a 19 tooth speedo gear.