107mm rear tires with matched GP6 gearing

Installation notes

• Use the exact matched rear GP6 45T/14T pair. A ring gear and input gear from different GP families are not an approved combination.
• Retain the factory front GP5 42T ring/15T input pair and 100mm front tires. Replace the rear with GP6 45T/14T and one pair of 107mm rear tires.
• The complete-differential route uses one ARA311024 assembly, one ARA311018 input gear and one sold tire pair. The assembled differential contains 10,000cSt oil and its differential bearings.
• The rebuild alternative uses one ARA311019 ring gear and one ARA311018 input gear. Retain the sound AR310433 case, AR310436 internal gears, AR310439 outdrives, bearing and shim arrangement; renew the gasket and refill oil during service.
• One ARA550073 sold pack supplies two pre-glued wheels and tires with 17mm hexes. Stock matching wheel hexes, wheel nuts, hubs, driveshafts and front wheels remain in use.
• Retain the existing rear input-gear bearings and housing hardware if sound; inspect gear mesh, shimming, differential freedom and wheel/body clearance after assembly.
• Motor, ESC, receiver, battery limits, motor pinion and center differential remain at the existing specification. This recipe does not validate a spool or a higher-voltage power system.
• The factory tire rule specifies these GP5/GP6 pairs. Nominal tire-diameter arithmetic alone is not a reason to mix a GP5 ring with a GP6 input gear.
• Owner handling opinions are uncontrolled observations. No measured traction, steering, speed or wear improvement is claimed.

Sources