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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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Store Pickup:

South Jordan, UT
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Price:  $5.99

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Updated on Jun 23, 2025 02:18:54 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 building and construction, gun metal in color
Changes a used or damaged idler gear and shaft

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

REQUIRES:
Setup following the design manual

SPECS:
Externally Size: .86" (22mm)
Inside Size: .43" (11mm)
Thickness: .50" (12.5mm)

Here is another product that praises the product being reviewed.

Gearbox Halves, Shift Detent B

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

FEATURES:
Black plastic building and construction

INCLUDES:
Gearbox halves (front and back) and screws

REQUIRES:
Remainder of the gearbox contents

SPECS:
Length: 2.67 (68mm) (at largest point)
Width: 3.42" (87mm) (at largest point)

This product is often purchased with the above pointed out product.

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 design manual

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

This product 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 building and construction
Blue rubber dirt shields

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

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

You will like this product if you have the product earlier discussed.

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

This is a 6X12mm Ball Bearing Set from Traxxas.

FEATURES:
Steel building and construction
Blue rubber dirt shields

INCLUDES:
(2) ball bearings, Part #5117

SPECS:
Inside diameter: 6mm
Externally diameter: 12mm
Width: 4mm

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

The below product also pairs truly well with the product being reviewed.

Output Shaft, Transmission

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

FUNCTIONS:
Metal building and construction, black in color

INCLUDES:
One transmission output shaft, Part #5369

REQUIRES:
Setup on the Traxxas E-Maxx

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

The below product also pairs truly well with the product being reviewed.

Output Gear, 33 T W/ Spacers (

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

FEATURES:
Black nylon building and construction

INCLUDES:
One 33T output gear
2 spacers

REQUIRES:
Silicone Grease, use TRAC6037

SPECS:
Outer diameter: 1.37" (35mm)
Thickness: 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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