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Traxxas Idler Gear, 20-Tooth/ Idler Ge (Traxxas 3996X | TRA3996X)

Model: Traxxas 3996X
Dist. #: TRA3996X   SKU: TRA3996X

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South Jordan, UT
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Price:  $5.99

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Updated on Nov 18, 2025 05:43:31 PM

Idler Gear 20T/Idler Gear Shaft E-Maxx...
This is the replacement 20 Tooth Idler Equipment and Shaft for the
Traxxas E-Maxx 4WD RTR.

FEATURES:
Steel construction, weapon metal in color
Replaces a worn or damaged idler gear and shaft

INCLUDES:
One 20 Tooth Idler Equipment
One 5x18mm Idler Equipment Shaft

REQUIRES:
Setup following the model handbook

SPECIFICATIONS:
Outside Diameter: .86" (22mm)
Inside Diameter: .43" (11mm)
Density: .50" (12.5mm)

Right here is one more thing that praises the thing being reviewed.

Gearbox Halves, Shift Detent B

These are the replacement Gearbox Halves for the Traxxas E-Maxx Truck.

FEATURES:
Black plastic construction

INCLUDES:
Gearbox halves (front and back) and screws

REQUIRES:
Rest of the gearbox contents

SPECIFICATIONS:
Length: 2.67 (68mm) (at widest point)
Width: 3.42" (87mm) (at widest point)

This thing is regularly gotten with the above pointed out thing.

Input Shaft/ Drive Gear Assemb

This is the replacement Input Shaft/Drive Equipment Assembly for the
Traxxas 3905 E-Maxx Truck.

FEATURES:
Steel shaft, black in color
Steel drive gear assembly, silver in color

INCLUDES:
One Input Shaft with 18 Tooth Top Equipment

REQUIRES:
Setup following the model handbook

SPECIFICATIONS:
Shaft Diameter: 5mm
Shaft Length: 3.53" (90mm)
Thread Size: 4mm

This thing praises the main item here.

5 X 11 X 4Mm Ball Bearing (2) Blue Rubber Shield R Evo

This is a 2 pack of 5X11mm Ball Bearings for the Traxxas Revo.

FEATURES:
Metal bearing construction
Blue rubber dirt guards

INCLUDES:
(2) 5X11mm ball bearings, Part #5116

SPECIFICATIONS:
Inside diameter: 3/16" (5mm)
Outside diameter: 7/16" (11mm)
Width: 5/32" (4mm)

You will certainly enjoy this item if you have the item previously stated.

6 X 12 X 4Mm Ball Bearing (2) Blue Rubber Sheild R Evo

This is a 6X12mm Ball Bearing Set from Traxxas.

FEATURES:
Steel construction
Blue rubber dirt guards

INCLUDES:
(2) ball bearings, Part #5117

SPECIFICATIONS:
Inside diameter: 6mm
Outside diameter: 12mm
Width: 4mm

COMMENTS:
This bearing set is utilized in the transmission and differentials of
    the Revo.

The listed below thing likewise pairs really well with the thing being reviewed.

Output Shaft, Transmission

This is the Transmission Output Shaft for the Traxxas E-Maxx.

FEATURES:
Metal construction, black in color

INCLUDES:
One transmission output shaft, Part #5369

REQUIRES:
Setup on the Traxxas E-Maxx

SPECIFICATIONS:
Overall length: 2.75" (70mm)
Diameter of drive dog install: .39" (10mm)
Diameter of shaft: .23" (6mm)

The listed below thing likewise pairs really well with the thing being reviewed.

Output Gear, 33 T W/ Spacers (

This is the Output Equipment 33T for the Traxxas E-Maxx Truck.

FEATURES:
Black nylon construction

INCLUDES:
One 33T output gear
Two spacers

REQUIRES:
Silicone Grease, usage TRAC6037

SPECIFICATIONS:
Outer diameter: 1.37" (35mm)
Density: 1.02" (26mm)
X-Plosion Parts Finder Part also Fits on the vehicles below:

Frequently Bought Together

Traxxas Idler Gear, 20-Tooth/ Idler Ge
+
Traxxas 5 X 11 X 4Mm Ball Bearing (2) Blue Rubber Shield R Evo
+
Traxxas OUTPUT GEAR, 36-TOOTH, ME
This Item: Traxxas Idler Gear, 20-Tooth/ Idler Ge
$5.99
Traxxas 5 X 11 X 4Mm Ball Bearing (2) Blue Rubber Shield R Evo
$4.49
Traxxas OUTPUT GEAR, 36-TOOTH, ME
$10.49

Total Price: $20.97

Add All Three To Cart

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