Eaton Detroit Truetrac Differentials

4.78 out of 5 stars 501 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 31 Spline Differential Ford 8.8 Inch 913A561

Differential, Eaton Detroit Truetrac, Limited Slip, 31-Spline, Ford, 8.8 in., Each

Part Number: ETN-913A561

4.86 out of 5 stars ( 28 )

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Eaton Detroit Truetrac 34 Spline Differential Ford 9.75 Inch 913A477

Differential, Eaton Detroit Truetrac, 1.370 in. Axle Shaft Diameter, 34-Spline, Ford, 9.75 in., Each

Part Number: ETN-913A477

4.71 out of 5 stars ( 14 )

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Eaton Detroit Truetrac 31 Spline Differential Ford 9 Inch 913A586

Differential, Eaton Detroit Truetrac, 31-Spline, Ford 9 in., Each

Part Number: ETN-913A586

4.75 out of 5 stars ( 12 )

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Eaton Detroit Truetrac 28 Spline Differential Ford 9 Inch 912A587

Differential, Eaton Detroit Truetrac, Limited Slip, 28-Spline, Ford, 9 in., Each

Part Number: ETN-912A587

5.0 out of 5 stars ( 8 )

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Eaton Detroit Truetrac 30 Spline Differential Dana 44 913A589

Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, 3.73:1 and Down Only, Dana 44, Each

Part Number: ETN-913A589

4.78 out of 5 stars ( 9 )

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Eaton Detroit Truetrac 28 Spline Differential Ford 8 Inch 912A616

Differential, Eaton Detroit Truetrac, Limited Slip, 28-Spline, Ford, 8 in., Each

Part Number: ETN-912A616

5.0 out of 5 stars ( 9 )

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Eaton Detroit Truetrac 35 Spline Differential Ford 10.25/10.50 Inch 915A550

Differential, Eaton Detroit Truetrac, 35-Spline, Ford, 10.25 in./10.5 in., Full Floater Only, Each

Part Number: ETN-915A550

4.88 out of 5 stars ( 33 )

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Eaton Detroit Truetrac 30 Spline Differential Dana 44 913A590

Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, 3.92:1 and Up Only, Dana 44, Each

Part Number: ETN-913A590

4.5 out of 5 stars ( 4 )

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Eaton Detroit Truetrac 28 Spline Differential Ford 8.8 Inch 912A562

Differential, Eaton Detroit Truetrac, 28-Spline, Ford, 8.8 in., Each

Part Number: ETN-912A562

5.0 out of 5 stars ( 5 )

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Eaton Detroit Truetrac 34 Spline Differential Ford Super 8.8 Inch 917A739

Differential, Eaton Detroit Truetrac, Limited Slip, 34-Spline, 3.31:1 and Higher Only, Ford 8.8, Each

Part Number: ETN-917A739

Not Yet Reviewed

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Eaton Detroit Truetrac 27 Spline Differential Dana 30 912A585

Differential, Eaton Detroit Truetrac, 27-Spline, Dana 30, Each

Part Number: ETN-912A585

4.67 out of 5 stars ( 15 )

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Eaton Detroit Truetrac 30 Spline Differential Dana 44/44 IFS 913A592

Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, Dana 44, Each

Part Number: ETN-913A592

Not Yet Reviewed

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Eaton Detroit Truetrac 35 Spline Differential Dana 80 915A450

Differential, Eaton Detroit Truetrac, 35-Spline, Dana 80, 11.5 in. Ring Gear, 4.10 + up, Each

Part Number: ETN-915A450

Not Yet Reviewed

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Eaton Detroit Truetrac 30 Spline Differential Dana 44 913A591

Differential, Eaton Detroit Truetrac, 30-Spline, Dana 44, Each

Part Number: ETN-913A591

Not Yet Reviewed

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Eaton Detroit Truetrac 34 Spline Differential Ford Super 8.8 Inch, IRS 917A731

Differential, Eaton Detroit Truetrac, Limited Slip, 34-Spline, Ford 8.8 in. IRS, Ford, Each

Part Number: ETN-917A731

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Eaton Detroit Truetrac 31 Spline Differential Ford 8.8 Inch 917A738

Differential, Eaton Detroit Truetrac, Limited Slip, 31-Spline, All Ratios, Ford 8.8, Each

Part Number: ETN-917A738

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Eaton Detroit Truetrac 32 Spline Differential Dana 44 917A736

Differential, Eaton Detroit Truetrac, Limited Slip, 32-Spline, Dana 44 M210/M220, Jeep, Ford, Each

Part Number: ETN-917A736

Not Yet Reviewed

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Eaton Detroit Truetrac 37 Spline Differential Dana 80 916A427

Differential, Detroit Truetrac, 37-Spline, Dana 80, 4.10:1+ Higher, Each

Part Number: ETN-916A427

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Eaton Detroit Truetrac 37 Spline Differential Dana 80 916A566

Differential, Detroit Truetrac, 37-Spline, Dana 80, 3.73:1+ Lower, Each

Part Number: ETN-916A566

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Eaton Detroit Truetrac 28 Spline Differential Ford 8.8 Inch, IFS 912A563

Differential, Eaton Detroit Truetrac, 28-Spline, Ford, 8.8 in., Each

Part Number: ETN-912A563

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Eaton Detroit Truetrac 28 Spline Differential Ford 7.5 Inch 912A316

Differential, Detroit Truetrac, 28-Spline, Ford, 7.5 in., Each

Part Number: ETN-912A316

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

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