Strange Engineering D1524 Standard Series Steel Spool 33 Spline GM 8.5 10-Bolt

The Strange Engineering D1524 is a Standard Series steel spool designed to replace heavier and weaker cast-iron differential carriers in GM 8.5-inch 10-bolt rear ends. This full-size spool is manufactured from 8620 forged steel and precision-machined to permanently lock both axle shafts together, ensuring both rear tires always turn at the same speed with equal force. Ideal for drag racing, drifting, and other motorsports applications where uninterrupted power transfer is critical.

Key Features:

• Manufactured from 8620 forged steel for maximum strength and durability
• Broached for Strange 33 spline axles (will not fit other manufacturers' axles)
• Final turn operation performed after heat treatment to ensure precision accuracy
• Maintains same spline locations as OEM differential for easier conversion
• Provides more rigid gear mounting, improving ring and pinion life
• Eliminates differential side gear failure and carrier deflection issues
• Designed and machined by Strange Engineering, forged in the USA
• Weighs approximately 9.68 lbs

Requirements: This spool requires Strange 33 spline axles, special side bearing kit (D1585), a 2.73 and numerically higher gear set, and a C-clip eliminator kit or aftermarket housing ends. Not recommended for street use.

The Standard Series steel spools share the same premium material characteristics as Strange's Lightweight Pro Race Spools but without lightening holes, making them an affordable and dependable choice when weight reduction is not the primary concern.