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Instead of piecing one together and hoping it all fits, get a complete third member assembly with one part number from Summit Racing Equipment!
A complete third member...
Instead of piecing one together and hoping it all fits, get a complete third member assembly with one part number from Summit Racing Equipment!
A complete third member assembly (sometimes called a center section) includes everything you need to connect your driveshaft to your rear axles. They typically include a U-joint style yoke to connect to your driveshaft, ring and pinion gears, differential carrier, and a case. They’re also available with spools for maximum traction.
Whether you need a lightweight center section for racing, a trail-tough third member assembly for off-roading, or a stock replacement for fixing up your...
Instead of piecing one together and hoping it all fits, get a complete third member assembly with one part number from Summit Racing Equipment!
A complete third member assembly (sometimes called a center section) includes everything you need to connect your driveshaft to your rear axles. They typically include a U-joint style yoke to connect to your driveshaft, ring and pinion gears, differential carrier, and a case. They’re also available with spools for maximum traction.
Whether you need a lightweight center section for racing, a trail-tough third member assembly for off-roading, or a stock replacement for fixing up your daily driver, our search tools make it easy to find the right third member assembly! For example, if you’re your looking for a Ford 9 inch third member, you can filter by case style (Ford, Chevy, Toyota, etc.), axle spline count, gear ratio, and more! With hundreds of applications available, Summit is your go-to source for complete third member assemblies.
Third Member, 3.50:1 Gear Ratio, Currie TwinTrac, 31-Spline, Nodular Iron Case, Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9CT350S50
Estimated Ship Date: Today
Estimated Ship Date: Today
Third Member, 3.70:1 Gear Ratio, Currie TwinTrac, 31-Spline, Nodular Iron Case, Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9CT370S50
Estimated Ship Date: Today
Estimated Ship Date: Today
Third Member, 4.11:1 Gear Ratio, Currie TwinTrac, 31-Spline, Nodular Iron Case, Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9CT411S50
Estimated Ship Date: Today
Estimated Ship Date: Today
Third Member, 3.89:1 Gear Ratio, Currie TwinTrac, 31-Spline, Nodular Iron Case, Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9CT389S50
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Center Section, 9 in. Ford, Nodular Iron, Trak-Lok, 31-Spline Axle, 3.70:1 Ratio, Each
Part Number: MSR-3MNC31AN370
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Third Member Complete Assembly, Detroit Speed, FN988 Assembly, 8.8 in. Gears, 31 Spline, Truetrac, 3.55 Ratio, 1350 Yoke, for Ford 9 in Housing, Each
Part Number: DSR-070880-355DS
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
THIRD MEMBER ASSEMBLY
Part Number: CUR-CE-9CT325S50
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
3RD MEMBER ASSEMBLY 3.31
Part Number: DSR-070880-331DS
Not Yet Reviewed
Estimated Ship Date: May 9, 2025 if ordered today
Estimated Ship Date: May 9, 2025 if ordered today
Third Member Complete Assembly, Detroit Speed, FN988 Assembly, 8.8 in. Gears, 31 Spline, Truetrac, 3.73 Ratio, 1350 Yoke, for Ford 9 in Housing, Each
Part Number: DSR-070880-373DS
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Third Member, 3.00:1 Gear Ratio, Currie TwinTrac, 31-Spline, Nodular Iron Case, Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9CT300S50
Not Yet Reviewed
Estimated Ship Date: May 19, 2025 if ordered today
Estimated Ship Date: May 19, 2025 if ordered today
9-Inch Third Member Complete Assembly, 3.50 Gear Ratio Spool. 35 Spline, Nodular Iron Case, 1350 Yoke, Each
Part Number: CUR-CE-9SP350R50
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
Complete Third Member, 4.11:1 Gear Ratio, Detroit TrueTrac, 35-Spline, Nodular Iron Race Case, Aluminum Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9TT411R50
Not Yet Reviewed
Estimated Ship Date: May 19, 2025 if ordered today
Estimated Ship Date: May 19, 2025 if ordered today
Center Section, 9 in. Ford, Nodular Iron Case, Trak-Lok, 28-Spline, Daytona Pro/Street Support, 3.50:1, Each
Part Number: MSR-3MSC28AN350
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2025 if ordered today
Estimated Ship Date: Jun 9, 2025 if ordered today
Center Section, 9 in. Ford, Aluminum, Detroit Truetrac, 31-Spline Axle, 3.70:1 Ratio, Each
Part Number: MSR-3MAT31AA370
Not Yet Reviewed
Estimated Ship Date: May 12, 2025 if ordered today
Estimated Ship Date: May 12, 2025 if ordered today
Center Section, 9 in. Ford, Nodular Iron, Locker, 35-Spline Axle, 3.50:1 Ratio, Each
Part Number: MSR-3MNL35AA350
Not Yet Reviewed
Estimated Ship Date: May 14, 2025 if ordered today
Estimated Ship Date: May 14, 2025 if ordered today
FORD 9'' 3.70 S GEAR 31 SPLINE TRUETRAC
Part Number: DSR-90-30020
Not Yet Reviewed
Estimated Ship Date: May 9, 2025 if ordered today
Estimated Ship Date: May 9, 2025 if ordered today
Center Section, 9 in. Ford, Nodular Iron Case, Truetrac, 35-Spline, Daytona Pro/Street Support, 3.70:1, Each
Part Number: MSR-3MNT35AA370
Not Yet Reviewed
Estimated Ship Date: May 14, 2025 if ordered today
Estimated Ship Date: May 14, 2025 if ordered today
Center Section, 9 in. Ford, Aluminum, Detroit Truetrac, 31-Spline Axle, 4.11:1 Ratio, Each
Part Number: MSR-3MAT31BA411
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2025 if ordered today
Estimated Ship Date: Jun 9, 2025 if ordered today
Complete Third Member, 3.70:1 Gear Ratio, Detroit TrueTrac, 35-Spline, Nodular Iron Race Case, Aluminum Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9TT370R50
Not Yet Reviewed
Estimated Ship Date: May 21, 2025 if ordered today
Estimated Ship Date: May 21, 2025 if ordered today
Complete Third Member, 3.50:1 Gear Ratio, Detroit TrueTrac, 35-Spline, Nodular Iron Race Case, Aluminum Big Bearing Pinion Support, 1350 Yoke, Each
Part Number: CUR-CE-9TT350R50
Not Yet Reviewed
Estimated Ship Date: May 19, 2025 if ordered today
Estimated Ship Date: May 19, 2025 if ordered today
Center Section, 9 in. Ford, Nodular Iron, Spool, 40-Spline Axle, 5.29:1 Ratio, Each
Part Number: MSR-3MNS40-AA529
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
5.29 4cyl Spool
Part Number: TGI-140067-1-KIT
Not Yet Reviewed
Estimated Ship Date: Jun 2, 2025 if ordered today
Estimated Ship Date: Jun 2, 2025 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- V6 5.29 ARB
Part Number: TGI-304633-1-KIT
Not Yet Reviewed
Estimated Ship Date: Jun 2, 2025 if ordered today
Estimated Ship Date: Jun 2, 2025 if ordered today
Third Member Complete Assembly, Detroit Speed, FN988 Assembly, 8.8 in. Gears, 31 Spline, Truetrac, 3.08 Ratio, 1350 Yoke, for Ford 9 in Housing, Each
Part Number: DSR-070880-308DS
Not Yet Reviewed
Estimated Ship Date: May 9, 2025 if ordered today
Estimated Ship Date: May 9, 2025 if ordered today
Center Section, 9 in. Ford, Aluminum Case, Spool, 35-Spline Axle, Pro 10-Hole Support, 4.86:1 Ratio, Each
Part Number: MSR-3MAS35AT486P
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2025 if ordered today
Estimated Ship Date: Jun 9, 2025 if ordered today
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