TRAXXAS Compatible Spur & Input Gear Upgrade XRT3320S by GPM  [XRT3320S]

TRAXXAS XRT 8S 20crmnti Steel M1.5 Spur Gear 33T+Transmission Input Gear 20T (1.0 Mod) - GPM XRT3320S
Price:
AUD$54.17
Brand:
GPM
Model:
XRT3320S
Condition:
Brand New
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Precision spur and input gear upgrade built for the TRAXXAS XRT 8S

The kit provides a consolidated drivetrain upgrade pairing a 33T spur with a 20T input pinion mounted on a reinforced aluminum bracket with bearing support. Gears are produced from 20CrMnTi steel and the bracket is 7075 aluminium to form a three-point support that reduces transmission movement versus simpler two-point mounts.

Fit and installation: the assembly removes the separate 2.5mm locating pin by integrating the motor gear and input shaft. Included shims and a bearing allow you to set endplay and tooth mesh accurately. Spur gear module is 1.5 with a D-shaped motor bore and 14mm face width; the input is module 1.0 with 20 teeth.

What the pack contains

  • Spur Gear 33T M1.5 - 1 pcs
  • Transmission Input Gear 20T (1.0 Mod) - 1 pcs
  • Aluminum 7075 Mount - 1 pcs
  • Bearing 6x13x5 - 1 pcs
  • Shim 6x8x3.5 - 1 pcs
  • Shim 6x8x7.5 - 1 pcs
  • Set Screws 5x5 - 1 pcs

Original Name / Part No:

7785X,7786X

Listed Compatible Vehicles

  • TRAXXAS 1/6 4WD XRT 8S-78086-4
  • TRAXXAS 1/5 X-Maxx 8S MONSTER TRUCK-77086-4
  • TRAXXAS 1/6 XRT Ultimate 8S-78097-4
  • TRAXXAS 1/5 X-Maxx 8S Ultimate-77097-4

For Australian hobbyists seeking improved drivetrain longevity on the listed TRAXXAS 1/6 and 1/5 models, this steel gear conversion and 7075 mount deliver increased hardness and better shaft support; double-check fitment against the excluded TRAXXAS 1/5 X-Maxx 8S Monster Truck-77096-4 prior to fitting.

How does steel compare to the stock plastic gears for wear?

Steel gears made from 20CrMnTi offer significantly greater wear resistance than plastic originals, reducing the frequency of replacements under heavy use; ensure correct mesh to avoid accelerated wear.

Can I reuse my existing shims?

You can reuse shims if they are in good condition, but the kit includes two shims to simplify setting endplay. Replace any deformed shims to maintain proper tooth engagement.

Does the three-point mount require special tools?

No specialist tools are needed beyond standard hobby wrenches and a driver; careful measurement of mesh and endplay with feeler gauges or thickness gauges is recommended.

Is the bearing included sufficient for high-power setups?

The supplied 6x13x5 bearing improves input shaft support, but for extreme power applications consider monitoring bearing temperature and service intervals.

Which items are packed with the kit?

The kit ships with the 33T spur, 20T input gear, 7075 aluminium mount, one 6x13x5 bearing, two shims (3.5 and 7.5 thickness) and a 5x5 set screw as listed above.

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