

⚙️ Drive Precision, Own the Road
The General Motors GM Genuine Parts 3987919 Automatic Transmission Speedometer Drive Gear is a compact, lightweight, and OEM-equivalent replacement part designed for precise speedometer function. Manufactured by ACDelco, it ensures professional-grade reliability and fits seamlessly into compatible GM vehicles. Though discontinued, it remains a sought-after component for maintaining automotive accuracy and performance.





| Brand | General Motors |
| Material | Plastic |
| Item dimensions L x W x H | 3 x 2.5 x 1.1 inches |
| Item Weight | 0.02 Pounds |
| UPC | 036666071375 |
| Global Trade Identification Number | 00036666071375 |
| Manufacturer | ACDelco |
| Model | ACDelco - Automatic Trans (Slp) (3987919) |
| Item Weight | 0.32 ounces |
| Product Dimensions | 3 x 2.5 x 1.1 inches |
| Country of Origin | China |
| Item model number | 3987919 |
| Is Discontinued By Manufacturer | Yes |
| Manufacturer Part Number | 3987919 |
| OEM Part Number | 03987919 |
S**P
Great Muncie speedo gear
Fit my Muncie M21. Using it with the Dakota digital speedo sensor.
W**0
Gear
Muy buena calidad
C**B
Looks like a quality part!
Thank you for getting this shipped so quickly!.
P**W
Fit perfect, no more leaks.
Fit
J**S
Quality OEM part!
Easy install. Quality OEM parts. Be sure your bullet doesn’t leak and replace it at the same time.
S**P
fit good
fit good no oil leeks
C**S
Five Stars
Got them quick and fit perfectly with no leaking.
M**E
Five Stars
thx
Trustpilot
1 week ago
3 weeks ago