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#92614446
GM 3987921 Red 21 Tooth Speedometer Gear
24 Tooth
$13.99
/each
In Stock
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Key Specs
| MFG. Part # | 3987921 |
| Brand | GM Restoration Parts |
| Speedometer Gear Type | Driven |
| Tooth Count | 21 |
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Return PolicyGM Restoration Parts 3987921 Details
GM Restoration Parts 3987921 Details
Transmission speedo gear. Correct red color and 21 tooth design. Exact fit for all automatic powerglide , turbo 350 and saginaw or muncie manual transmissions. Will not work for automatic turbo 400 transmissions. Factory match for 3.31 rear axle ratio with o/e size tires. Replaces original GM part number 3987921.
GM Restoration Parts 3987921 Specifications
GM Restoration Parts 3987921 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 3987921 |
| Brand | GM Restoration Parts |
| Speedometer Gear Type | Driven |
| Tooth Count | 21 |
| GENERAL | |
| Speedometer Gear Color | Red |
| Speedometer Gear Material | Nylon |
| Sold in Quantity | Each |
| Notes | Must be used with a 1.84" OD Drive Gear |
Ratings & Reviews
5
3 Reviews
Customers praise our products for their exceptional quality, practicality and main features. The components are noted to be genuine and high-performing, ensuring optimal functionality. Notably, our products' superior design has resolved issues present in others, such as eliminating leaks. Users report consistently positive experiences, setting our products apart from competitors. There's consensus that our products perform to expectations, delivering on durability and reliability.
Ratings & Reviews
5
3 Reviews
Customers praise our products for their exceptional quality, practicality and main features. The components are noted to be genuine and high-performing, ensuring optimal functionality. Notably, our products' superior design has resolved issues present in others, such as eliminating leaks. Users report consistently positive experiences, setting our products apart from competitors. There's consensus that our products perform to expectations, delivering on durability and reliability.
5
3 reviews
5
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good products
5.0
3 years ago
DD
N Branch Mn
Verified
quality parts.
Servay
5.0
5 years ago
Izzy
Lincoln ne.
Verified
Never had a bad experience with speedway motors, and always so helpfull!
Would Recommend
Good product
5.0
8 years ago
37 Ford Coupe
Newton, Ks
Verified
It was a genuine GM speedo gear so it works perfectly. It actually didn't have the large casting ridge my old gear had and the a leak has been eliminated because of it.
Would Recommend
Showing 3 of 3 reviews
Questions & Answers
Questions & Answers
1 Question • 1 Answer
Hi , Can you advise me as to what speedometer gears I need in my GM Turbo 350 ? I'm, going to be running 3:73 final gear ratio with 29.5 tall tires . Thanks for your help
by BRIAN
• 8 years ago
1 answer
View Answer
1 of 1 questions shown