GPM Racing Hardened Steel #45 Front/Rear Bevel Gear Set 12T/24T for Traxxas 1/18 TRX-4M (TRX4M1200S)

GPM Technical Note – TRX4M Front/Rear Bevel Gears

This matched 12T/24T bevel gear set is engineered as a direct replacement for the front and rear transmission housings used on TRX4M models. Manufactured from Harden Steel #45 to provide enhanced wear resistance and stable tooth engagement for hobbyists performing maintenance or light tuning tasks.

Installation is a straightforward swap into housings compatible with the original bevel gears; technicians should verify mesh and axial clearance to ensure even loading across the tooth profile. These gears are intended to improve longevity of the transmission under ordinary running conditions while maintaining OEM fitment.

Packing includes

• Bevel gear set 12T/24T – 2pcs

Original Name / Part No:

9777

Compatible Models

• TRAXXAS-1/18 4WD TRX4M FORD BRONCO-97074-1
• TRAXXAS-1/18 4WD TRX4M LAND ROVER DEFENDER-97054-1

What tolerances should I check after fitting these gears?

Ensure axial endplay and lateral tooth contact are within spec by rotating the assembly and inspecting for uniform tooth contact; correct shim or carrier position if uneven.

Is any special lubrication required for Harden Steel #45?

Use a light to medium duty gear grease rated for metal-on-metal contact; avoid heavy pastes that can trap heat and always remove excess lubricant from the case vents.

Do I need to replace bearings when installing these gears?

Inspect bearing races and shafts for wear; replacing worn bearings is recommended to prevent misalignment and premature gear tooth wear. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.