TRAXXAS E-REVO Precision Steel Differential Gears ER1200S by GPM  [ER1200S]

Precision steel internals for E-REVO differentials

This ER1200S gear set provides hardened steel output and spider gears for TRAXXAS E-REVO platform diffs. The black-finish components are produced to maintain stable tooth contact under load and to reduce deformation compared with softer materials, delivering predictable rotational characteristics inside the diff housing. These parts are intended as direct replacements for compatible factory internals.

Service procedure remains conventional: remove the diff cover, remove existing gears, inspect bearing races and mating gear engagement, then fit the steel outputs and spiders. Establish correct gear mesh and axial clearance before final assembly, and replace any worn O-rings to retain sealing integrity. Apply the recommended differential grease and verify smooth rotation through full suspension articulation.

Technical notes: steel gear sets alter thermal conduction and wear profiles compared with polymer or softer alloy components. After initial running, inspect backlash, bearing preload and gear tooth condition. Maintain lubrication schedules and avoid over-torquing case fasteners, as that can shift gear alignment and reduce service life.

Designed for hobbyists and serious tuners replacing diff internals on compatible 1/10 4WD platforms who require a metal upgrade for durability and consistent mesh behaviour.