Pancar Geardiff Upper Case Aluminium Replacement - Arrowmax AM-931008 AM  [AM-931008]

Geardiff upper housing summary

The Arrowmax AM-931008 AM Pancar Geardiff Case Upper is a purpose-made replacement upper shell for Pancar-style geardiff units used in 1/12 and 1/10 scale cars. This description highlights fitment, service steps, and how the upper housing impacts differential behaviour and routine maintenance.

Use and fit: this component is made to pair with Pancar geardiff sets across 1/12 and 1/10 scale and typical F1-style assemblies. Prior to final assembly confirm the mating with your diff lower case, internal gear stack, and bearing sizes so gear mesh and preload remain correct.

Installation notes: remove the diff from the model, drain old lubricant, and open the case carefully so shims and gear orientation are preserved. When reassembling, check backlash, ensure bearing seats are clean, and tighten mounting screws in stages while checking free rotation to catch any binding early.

Tuning role: the upper case locates gears and bearings so its dimensional accuracy directly affects gear mesh, bearing preload, and the diff's response under drive and cornering. Replacing a worn or damaged upper shell restores the intended geometry and helps keep diff behaviour consistent for setup work.