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EATON

Eaton Detroit Truetrac Differentials

4.78 out of 5 stars 502 Customer Reviews

Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications.

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Eaton Detroit Truetrac 30 Spline Differential GM 8.5/8.6 Inch 913A481

Eaton Detroit Truetrac 30 Spline Differential GM 8.5/8.6 Inch 913A481

Eaton Detroit Truetrac 30 Spline Differential GM 8.5/8.6 Inch 913A481

Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, GM, 8.5/8.6 in., 2.73 & up, Each

Part Number: ETN-913A481

4.85 out of 5 stars ( 135 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Eaton Detroit Truetrac 28 Spline Differential GM 8.5 Inch 912A556

Eaton Detroit Truetrac 28 Spline Differential GM 8.5 Inch 912A556

Eaton Detroit Truetrac 28 Spline Differential GM 8.5 Inch 912A556

Differential, Eaton Detroit Truetrac, 28-Spline, GM, 8.5 in., Rear, Each

Part Number: ETN-912A556

4.84 out of 5 stars ( 31 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Eaton Detroit Truetrac 30 Spline Differential GM 10.5 Inch (14-bolt) 915A545

Eaton Detroit Truetrac 30 Spline Differential GM 10.5 Inch (14-bolt) 915A545

Eaton Detroit Truetrac 30 Spline Differential GM 10.5 Inch (14-bolt) 915A545

Differential, Eaton Detroit Truetrac, 30-Spline, GM, 10.5 in. Ring Gear, 4.10 and Lower Ratios, Each

Part Number: ETN-915A545

4.58 out of 5 stars ( 12 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Eaton Detroit Truetrac 33 Spline Differential GM 9.5 Inch 914A538

Eaton Detroit Truetrac 33 Spline Differential GM 9.5 Inch 914A538

Eaton Detroit Truetrac 33 Spline Differential GM 9.5 Inch 914A538

Differential, Eaton Detroit Truetrac, 33-Spline, GM, 14-Bolt, 9.5 in., Each

Part Number: ETN-914A538

4.44 out of 5 stars ( 9 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Eaton Detroit Truetrac 30 Spline Differential GM 10.5 Inch (14-bolt) 915A547

Eaton Detroit Truetrac 30 Spline Differential GM 10.5 Inch (14-bolt) 915A547

Eaton Detroit Truetrac 30 Spline Differential GM 10.5 Inch (14-bolt) 915A547

Differential, Eaton Detroit Truetrac, 30-Spline, GM, 10.5 in. Ring Gear, 4.56 and Higher Ratios, Each

Part Number: ETN-915A547

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

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