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⚙️ Drive with confidence—GM Genuine Parts keep your speedometer sharp and your ride flawless!
The GM Genuine Parts 3987920 Speedometer Driven Gear is a precision-engineered, metal transmission component made in the USA. Designed to meet strict GM OE standards, it fits a wide range of classic and modern GM transmissions, ensuring accurate speedometer readings and leak-free operation. Compact and lightweight, it comes with a 24-month unlimited mile warranty, making it the trusted choice for professional-grade vehicle maintenance.
| ASIN | B0013FIKQC |
| Best Sellers Rank | #668,795 in Automotive ( See Top 100 in Automotive ) #33 in Automotive Replacement Automatic Drive Gear Bearings |
| Brand | GM GENUINE PARTS |
| Brand Name | GM GENUINE PARTS |
| Customer Reviews | 4.4 out of 5 stars 41 Reviews |
| Global Trade Identification Number | 00036666071382 |
| Included Components | ACDelco - Automatic Trans (Slp-1) (3987920) |
| Item Dimensions | 2.8 x 2.5 x 1.1 inches |
| Item Type Name | ACDelco - Automatic Trans (Slp-1) (3987920) |
| Item Weight | 9.07 g |
| Item dimensions L x W x H | 2.8 x 2.5 x 1.1 inches |
| Manufacturer | ACDelco |
| Material | Metal |
| Material Type | Metal |
| UPC | 036666071382 |
| Unit Count | 1.0 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. |
D**N
Best purchase by far!
This is a great product, they even went as far as polishing the tip that rides on the shaft seal so that way no fluid leaks! I'm super happy with this. I installed it in my muncie M-20 and it works for M-21 M-22, turbo 350, 700R4, saginaw 3 speed and saginaw 4 speed.
S**H
Four Stars
good price,did the job
T**T
Great!
Gear worked perfectly! Very fast shipping. A++
J**T
Perfect fit and no further leaks
Easy install, connect speedo cable and insert into transmission. easy peasy.
A**R
Five Stars
Worked perfect on TH350
J**D
Not an ac delco part
Not ac delco like it says !!! Do not buy this it does not work.
A**N
It comes with 2 and is a gm part great product
Love it food gm parts
Trustpilot
2 weeks ago
2 weeks ago