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⚡ Keep your ride’s pulse perfect with GM Genuine Speedo Gear!
The GM Genuine Parts 3987918 Speedo Driven Gear is a factory-recommended replacement designed and tested to meet GM Original Equipment standards. It ensures precise speedometer readings and long-lasting durability, backed by a 24-month unlimited mile warranty, making it the trusted choice for maintaining your GM vehicle’s performance and reliability.
| ASIN | B000J6Z9TC |
| Best Sellers Rank | #1,323,309 in Automotive ( See Top 100 in Automotive ) #119 in Automotive Replacement Automatic Drive Gear Bearings |
| Brand | GM GENUINE PARTS |
| Brand Name | GM GENUINE PARTS |
| Customer Reviews | 4.3 out of 5 stars 42 Reviews |
| Global Trade Identification Number | 00036666071368 |
| Included Components | ACDelco - Automatic Trans (Slp) (3987918) |
| Item Dimensions | 2.9 x 2.5 x 1.1 inches |
| Item Type Name | ACDelco - Automatic Trans (Slp) (3987918) |
| Item Weight | 9.07 g |
| Item dimensions L x W x H | 2.9 x 2.5 x 1.1 inches |
| Manufacturer | ACDelco |
| Model | 3987918 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 03987918 |
| Thread Style | Npt |
| Thread Type | Npt |
| UPC | 036666071368 |
| Unit Count | 1 Count |
| Warranty Description | 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details. |
A**K
Works as advertised
Came as a two-pack.
M**H
Perfect replacement exactly as original.
Perfect replacement. Arrived quickly and was an exact representation of the original part. Exactly what I needed.
H**R
Fixed the issue
Fixed the issue, good value
A**R
part knowledge
End of speedo cable that hooks into 700-4 transmission on my S-10 chassis. Gear was stripped and that turns the speedometer in the truck.
N**N
Used a GPS based speedometer app on a smart phone to test
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.
C**N
Exactly What I Needed
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
E**I
just what I needed.
Now my speedo on my Cobra shows the right speed. Got two gears instead of one. Well , have a spare now.
L**O
Five Stars
acdelco 3987918 drive gear was the gear I need
Trustpilot
3 weeks ago
2 weeks ago