⚙️ Drive with confidence, powered by genuine precision.
The GM Genuine Parts 3987920 Speedometer Driven Gear is a compact, metal-constructed component made in the USA, designed to meet GM's original equipment standards. It features a polished tip to prevent fluid leaks and fits a wide range of GM transmissions, delivering reliable performance backed by a trusted brand and strong customer satisfaction.
| ASIN | B0013FIKQC |
| Best Sellers Rank | #1,345,883 in Automotive ( See Top 100 in Automotive ) #113 in Automotive Replacement Automatic Drive Gear Bearings |
| Brand | GM GENUINE PARTS |
| Customer Reviews | 4.4 4.4 out of 5 stars (41) |
| Date First Available | February 1, 2008 |
| Global Trade Identification Number | 00036666071382 |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 0.32 ounces |
| Item dimensions L x W x H | 2.8 x 2.5 x 1.1 inches |
| Item model number | 3987920 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 03987920 |
| Material | Metal |
| Model | ACDelco - Automatic Trans (Slp-1) (3987920) |
| OEM Part Number | 03987920 |
| Product Dimensions | 2.8 x 2.5 x 1.1 inches |
| UPC | 036666071382 |
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
W**H
I ordered the wrong size so did not work for me.
F**O
ajusto perfecto en mi transmisión TH350
H**T
Works fine
Trustpilot
1 day ago
2 months ago
