Gear Set Close Ratio: 3973
$6.00
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Gear Set Close Ratio: 3973
$6.00
Precision Fit
Durable internal gear construction
Close Ratio
Optimized 1st speed gear setup
Traxxas OEM
Direct fit replacement part
In Stock
Gear Up PerformanceEnhance your Traxxas transmission efficiency
The Traxxas Close Ratio Transmission Gear Set (Part #3973) includes a 21-tooth 1st speed gear and an 18-tooth input gear engineered for precise shifting and optimal power transfer. Perfect for maintaining or upgrading your Traxxas RC vehicle transmission, this gear set ensures smooth engagement during high-torque acceleration. Rely on genuine Traxxas replacement parts for peak drivetrain durability and reliable performance on any terrain.
Precision Engineered GearsDurable performance for intense bashing
Designed to handle heavy drivetrain loads, the Traxxas Close Ratio Transmission Gear Set delivers optimized gear reduction for smooth transitions and superior low-end control. Manufactured with high-strength composite materials, this gear set minimizes gear wear and gear slop inside the transmission box. Whether rebuilding a worn-out gearbox or tuning your ratio for technical tracks, this official Traxxas option part provides the exact fitment and dependable performance needed to keep your RC car running strong.
Technical SpecificationsEssential details for proper fitment
Compatible Vehicles
Select Traxxas Nitro and Electric Models
Part Type
Transmission Gear Set
Part Number
3973
1st Speed Gear
21 Tooth
Input Gear
18 Tooth
Material
Molded Composite Steel/Plastic
Placement/Position
Internal Transmission Assembly
Assembly Time
Standard Maintenance Time Required
Key Drivetrain FeaturesBuilt for smooth power delivery
Precision FitDesigned as an official factory replacement part for Traxxas transmissions
Close Ratio TuningIncludes 21T 1st speed gear and 18T input gear for optimal gearing
High DurabilityConstructed to withstand heavy brushless or nitro power demands
Smooth EngagementMolded tooth profile ensures quiet mesh and minimal power loss
Easy InstallationFits directly into original gearbox housings without modification
Frequently Asked QuestionsEverything you need to know
What models are compatible with the Traxxas Close Ratio Transmission Gear Set?
The Traxxas Close Ratio Transmission Gear Set (3973) is designed for specific multi-speed Traxxas RC vehicles, such as classic T-Maxx platforms. Please check your vehicle's exploded parts view to ensure fitment.
What is included with the Traxxas Close Ratio Transmission Gear Set?
The Traxxas Close Ratio Transmission Gear Set includes one 21-tooth 1st speed gear and one 18-tooth input gear.
Why should I install the Traxxas Close Ratio Transmission Gear Set in my RC car?
Installing the Traxxas Close Ratio Transmission Gear Set optimizes internal gear ratios, resulting in smoother shifting transitions and consistent acceleration out of corners.