Zronickly Speedometer Drive Gear 23-Tooth White for Ford Mustang T5/T45 (3.73/4.10)
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Description
xUpgrade and recalibrate your Ford Mustang's speedometer with the Zronickly 23-tooth white speedometer drive gear. Designed for manual T5/T45 transmissions and compatible with select Mustang years and rear ratio changes, this small component can help keep gauge readings aligned with real speed as you modify your drivetrain.
Why this matters for Mustang builders
When you swap rear gears or upgrade to a different ratio, speedometer accuracy can drift. This gear offers a practical, affordable way to maintain consistent readings without hunting for other parts. It’s a simple accessory that complements your index of drivetrain improvements and supports a more confident drive experience, whether daily cruising or weekend tuning.
Key fit and use cases
- Fitment covers 1983–1989 Mustangs with 4.10 ratios and T5/T45 transmissions, plus 1990–1998 V8 Mustangs with T5/T45 and ratios 3.55, 3.73, 4.10.
- 23-Tooth (White) design is targeted for manual transmissions when upgrading rear gears, with a clip included for secure wiring management.
What this does for your build
- Recalibrates the speedometer to reflect differential gear changes, helping readings match actual speed when gearing is adjusted.
- Offers a cost-effective, quick replacement that typically takes only minutes to install alongside other differential work.
How to choose and install
Before ordering, identify your transmission type (T5/T45) and confirm your rear gear ratio. Match the tooth count to your specific setup. After gear swaps, replace the speedometer gear to recalibrate readings and ensure proper function. Always handle connections and clips with care to secure wiring.
Installation tips include inspecting the drive gear path for debris, confirming a clean seating surface, and following the included clip to hold wiring in place. This is an aftermarket part designed to support accurate readings and fit your Mustang configuration.
FAQ
Q: What vehicles is this speedometer drive gear compatible with?
A: Fits 1983–1989 Mustangs with 4.10 gears and T5/T45, plus 1990–1998 V8 Mustangs with T5/T45 and ratios 3.55, 3.73, or 4.10.
Q: What do I receive and how is it installed?
A: Includes a 23-tooth white gear and clip; install after rear-gear changes and confirm your transmission type and ratio for correct calibration.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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