Broken Ring Gear from Hard Launches - Driftmotion 29 Spline Ring and Pinion Upgrade

Transmissionadvanced✓ OP Confirmed

Problem

Stock 28-spline ring and pinion in the factory 8" differential breaking teeth under repeated hard drag launches at higher power levels

Broken teeth on ring gear from hard launchesLarge chunks missing from ring gear teethRing gear tooth breakage progressing from heel breakage to full tooth shearing over time

Root Cause

The stock 28-spline ring and pinion gearset in the factory 8" differential lacks the strength to withstand repeated high-power drag launches, particularly when the pinion deflects under load and the mesh rides high on the weaker area of the ring gear tooth

Confidence

Low confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted August 2020 on SupraForums.com