ACDelco 3987918 GM Original Equipment Automatic Transmission Speedometer Driven Gear
Key features
- •GM-recommended replacement for your GM vehicle's original factory component
- •Offering the quality, reliability, and durability of GM OE
- •Manufactured to GM Original Equipment specifications for fit, form, and function
BrandACDelco
CategoryDrive Gear
Warranty24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.
ACDelco 3987918 GM Original Equipment Automatic Transmission Speedometer Driven Gear
List Price: $37.09$33.38DEALYou Save: $3.71 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 23, 2026In Stock (7)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers5.0
out of 5
Based on 5 reviews
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Used a GPS based speedometer app on a smart phone to test
Nathan•October 1, 2016
My speedo in my 1972 Corvette read about 10mph fast. I had a 21 tooth gear and went to this 18 tooth gear, speedo now reads within 3mph. Used a GPS based speedometer app on a smart phone to test.
Five Stars
Mark Harrison•November 23, 2015
Works good.
Five Stars
david Holloway•May 28, 2015
Worked great. Direct replacement of oem
Five Stars
Lo•August 25, 2014
acdelco 3987918 drive gear was the gear I need
Exactly What I Needed
Coyoteeman•February 9, 2012
My GMC Van needs a mechanical speedometer driven gear, Couldn't believe it....there it was....Same color and all...wow... The color is very important 'cause each of the many gears has differnt number of teeth and the color determines the number of teeth. Thanks good job
