TRAXXAS TRX4 Portal Housing Upgrade for Trail Crawler Front/Rear TRX4021A/2 by GPM  [TRX4021A/2]

TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2
Price:
NZD$49.67
Brand:
GPM
Model:
TRX4021A/2
GTIN:
4894538283297
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alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"
alt="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2" title="TRAXXAS TRX4 TRAIL CRAWLER Aluminum Outer Portal Drive Housing (Front Or Rear)-36pc set - GPM TRX4021A/2"

Aluminium outer portal drive housing for TRX4

This aluminium outer portal drive housing is designed for the TRAXXAS TRX4 Trail Crawler platform and serves as a direct replacement for the original plastic housings on front or rear portal axles. It helps stabilise the inner gears within the knuckle arms to maintain smoother gear engagement while crawling.

The component is machined from 6061 T6 aluminium with a 3D streamlined profile to lower weight without sacrificing tensile strength. It is intended for straightforward installation alongside the factory plastic parts so significant chassis changes are not required for fitment.

Source supply notes list this item as a 36pcs set and state that stainless steel cap head screws are included for assembly, 32 pcs. The item is offered as an RC-scale accessory to improve durability and gear stability in trail and rock crawling setups.

Specifications

  • Item TRAXXAS TRX4 Aluminium Outer Portal Drive Housing, 36pcs set
  • Material Aluminium 6061 T6
  • Model Number TRX4021A/2
  • Compatibility TRAXXAS TRX4 TRAIL CRAWLER (Front Or Rear)

Fit this aluminium housing when you want a more rigid, dimensionally stable outer portal case to cut play in knuckle arm gears and support smoother running on technical trails.

 

Product Reviews
1 Reviews
rating
The quality is good and both the delivery and the reception of the order, fast. I can not give more stars, because the price of each component is high, the cost of shipping very high, discounts for good customer null, and generic discounts, to use only

Is this part directly compatible with TRX4 axles?

It is specified for the TRAXXAS TRX4 Trail Crawler portal axles and will fit the described front or rear outer portal positions.

What material is used and why does it matter?

CNC machining from 6061 T6 aluminium provides better tensile strength and dimensional stability compared with stock plastic parts.

Are assembly screws included?

The listing notes that stainless steel cap head screws are included for assembly, listed as 32 pcs.

Do I need to modify other components to install this?

Major modifications are not normally required because the housing is designed to interface with the original plastic components, but always verify clearances when fitting.

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