Traxxas TRX-4 Precision 6061 Lower Gear Cover TRX4038BA by GPM  [TRX4038BA]

TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA
Price:
USD$44.90
Brand:
GPM
Model:
TRX4038BA
GTIN:
4894538308068
Condition:
Brand New
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alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Lower Gear Cover - 13pc set - GPM TRX4038BA"

Precision 6061 lower cover engineered for TRX-4

This CNC-machined 6061 aluminium lower gear cover is engineered for use on Traxxas TRX-4 chassis to shield the centre transmission and provide a rigid mounting surface under the frame. The hollowed profile is machined to reduce weight while maintaining structural stiffness and presenting exposed aluminium for passive heat transfer.

Installed, the cover reduces deformation in the transmission area and improves lower chassis rigidity, helping to stabilise suspension link mounts during technical, low-speed crawling. It is intended for scale hobby RC use only and not for any full-size application.

Hardware supplied matches the original lower cover fastener pattern for direct replacement on compatible TRX-4 variants, enabling accurate alignment with existing mounting points.

  • Transmission Case Lower Cover - 1 pcs
  • Stainless Steel Round Head Screw 3x25 - 2 pcs
  • Stainless Steel Round Head Screw 3x16 - 4 pcs
  • Stainless Steel Round Head Screw 3x10 - 4 pcs
  • Stainless Steel Round Head Screw 3x8 - 2 pcs

Compatible Models

  • Traxxas TRX-4 Defender
  • TRX-4 Tactical Unit

Recommended for builds where transmission protection, improved chassis rigidity and passive thermal dissipation are required; supplied fasteners support precise, repeatable installation on the models listed.

What tolerances are relevant for fitment?

Confirm that the vehicle lower mount points align with the cover's hole pattern. Minor tolerance differences can be accommodated by the supplied stainless fasteners, but check for correct seating during installation.

How does the hollow CNC profile affect stiffness?

The hollowed profile removes non-critical material to cut weight while preserving key load paths, resulting in a favourable stiffness to mass ratio for scale trail use.

Are the fasteners corrosion resistant?

The included stainless steel screws resist corrosion in typical hobby environments, helping maintain long-term fitment integrity and repeatable torque settings.

Any setup advice after fitting?

After installation, verify suspension link geometry and ride height. The additional lower stiffness can influence link dynamics, so fine-tune mounting positions if necessary for optimal handling.