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Traxxas TRX-4 printable upgrades

Portal axles, a two-speed transmission and T-Lock diffs. Traxxas sells overdrive and underdrive diff gears, so front/rear OD tuning is a real option on this truck.

15 parts · 2 reported · 13 unverified · none test-fitted by CrawlWorx yet · Gearing for the Traxxas TRX-4 →

Parts list

Unverified

Low CG Battery Tray (easy to print)

by CippyO on Printables · Battery trays

Material: Not stated by source
Hardware: 2x M3x10 countersunk screws to join the halves

View on Printables (opens the original listing for Low CG Battery Tray (easy to print))

Unverified

TRX-4 Front Battery Mount

by Dao20 on Printables · Battery trays

Material: Not stated by source
Hardware: 4 screws and a velcro strap

View on Printables (opens the original listing for TRX-4 Front Battery Mount)

Unverified

TRX-4 Front Mounted Battery Tray

by Outlaw_NL on Printables · Battery trays

Material: PLA (ABS/PETG should work)
Hardware: Not stated by source

Sits between the rails, ahead of the servo.

View on Printables (opens the original listing for TRX-4 Front Mounted Battery Tray)

Unverified

TRX-4 Low CG Battery Tray for Large Batteries

by MexGessi on Thingiverse · Battery trays

Material: Not stated by source
Hardware: Not stated by source

View on Thingiverse (opens the original listing for TRX-4 Low CG Battery Tray for Large Batteries)

Unverified

TRX4 Low CG Battery Tray with Receiver/ESC Mount

by matador on Thingiverse · Battery trays

Material: Not stated by source
Hardware: Not stated by source

Remix.

View on Thingiverse (opens the original listing for TRX4 Low CG Battery Tray with Receiver/ESC Mount)

Unverified

TRX-4 Bumper Mount Delete

by CommaLlama on Cults3D · Bumpers

Material: TPU 95A (designer)
Hardware: Not stated by source

Free. Also published on Thingiverse.

View on Cults3D (opens the original listing for TRX-4 Bumper Mount Delete)

Unverified

TRX4 Front Bumper Mount

by kiatkla on Cults3D · Bumpers

Material: Not stated by source
Hardware: Not stated by source

Free.

View on Cults3D (opens the original listing for TRX4 Front Bumper Mount)

Unverified

TRX4 & TRX6 Chassis Parts

by Revellio on Printables · Chassis

Material: PLA (designer, 15% infill)
Hardware: M3 screws; some parts take pressed-in M3 nuts

View on Printables (opens the original listing for TRX4 & TRX6 Chassis Parts)

Reported fit

TRX4 Chain/Track Drive (All-Terrain Traxx)

by Mr.(Pr)interesting on Printables · Drivetrain

Material: TPU (chain); PLA or PETG (rest)
Hardware: Bearings: 4x 27x20x4, 4x 15x21x4, 40x 19x6x6; M3 screws

Designer says it was tested on several TRX models, in snow and mud.

View on Printables (opens the original listing for TRX4 Chain/Track Drive (All-Terrain Traxx))

Unverified

TRX4 Diff Lock Servo Lay-Down Mount

by mapache on MakerWorld · Electronics mounts

Material: Not stated by source
Hardware: Not stated by source

Mounts the diff-lock servos horizontally. A V2 is included.

View on MakerWorld (opens the original listing for TRX4 Diff Lock Servo Lay-Down Mount)

Unverified

TRX-4 Roof Rack Crossbar

by Filipes91 on MakerWorld · Scale accessories

Material: Not stated by source
Hardware: M2x12 screws, M2 nuts

Defender body.

View on MakerWorld (opens the original listing for TRX-4 Roof Rack Crossbar)

Unverified

TRX4 Defender Top Plate

by Dutchrogeu on MakerWorld · Scale accessories

Material: Not stated by source
Hardware: Not stated by source

Defender body. Sits in the stock roof rack.

View on MakerWorld (opens the original listing for TRX4 Defender Top Plate)

Unverified

TRX4 Sliders with Magnetic Body Mounts (Pinched Toyota)

by JohnE on Printables · Sliders

Material: Not stated by source
Hardware: Reuses the stock slider screws; magnets glued to body and posts

Made for a Pinched Toyota 1/10 body. Includes a battery holder for about a 3S 1300 mAh pack.

View on Printables (opens the original listing for TRX4 Sliders with Magnetic Body Mounts (Pinched Toyota))

Unverified

TRX-4 Servo Mount 5 mm Down

by D-Tecc on Printables · Suspension

Material: PLA (print profile)
Hardware: Not stated by source

Lowers the servo 5 mm for lifted suspension. Pair it with the designer's panhard link set.

View on Printables (opens the original listing for TRX-4 Servo Mount 5 mm Down)

Reported fit

TRX4 Front Axle Shock Link Mount

by itsw on Printables · Suspension

Material: Nylon 6-CF (PLA too brittle, PETG too weak per designer)
Hardware: Not stated by source

V2 can be printed in PC or Nylon-CF with snug supports.

View on Printables (opens the original listing for TRX4 Front Axle Shock Link Mount)

Links checked on 16 Oct 2026. Designers own their files; check the listing for license terms. Know a part that fits? Fit reports are coming with the newsletter.