Axle 31 Spline 29.0in 1.130in OD

The Axle 31 Spline 29.0in 1.130in OD from Strange Oval is a high-performance replacement axle shaft engineered for serious drag racing and high-torque street applications. Built for vehicles that demand absolute reliability under extreme load conditions, this 31-spline axle is the backbone of any build targeting consistent power delivery and minimal drivetrain slippage. Whether you're upgrading a dedicated quarter-mile car or reinforcing a heavily modified street engine, this Strange Oval axle provides the structural integrity needed to handle peak horsepower without shaft failure or spline rounding.

The 31-spline design offers superior load distribution compared to 28-spline and 30-spline alternatives, reducing stress concentration at each spline root and extending shaft life under repeated high-g launches. At 29.0 inches in overall length with a 1.130-inch outer diameter, this axle accommodates standard posi-traction differentials and supports both street and competition configurations. The precision-ground shaft geometry and high-grade steel construction resist twisting deformation and micro-fracturing—critical factors when running solid-mounted differentials or nitrogen-assisted drag racing setups. Strange Oval's manufacturing tolerances ensure perfect fit with OEM and aftermarket carrier housings, eliminating wobble and premature bearing wear.

This axle is ideal for drag racers, circle-track competitors, and serious street enthusiasts rebuilding 10-bolt, 12-bolt, or Ford 9-inch differentials. If you're installing a turbo or supercharger package, upgrading to a higher-stall torque converter, or tuning for aggressive launch RPM, a 31-spline Strange Oval axle is essential insurance against catastrophic driveline failure. Verify your differential carrier spline count and housing length before purchase to ensure correct fitment. Installation requires proper alignment during carrier assembly and torque specification per your differential manufacturer's technical manual.