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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.
Showing In Stock Items. Show All 48 Items.
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- High Pinion 4.88 Zip Air Locker
Part Number: TGI-304644-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- High Pinion 5.29 Zip Air Locker
Part Number: TGI-304645-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
4.88 4 Cyl Zip Air Locker 29-Spline
Part Number: TGI-304121-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
5.29 4 Cyl Zip Air Locker 29-Spline
Part Number: TGI-304122-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Ring and Pinion, 4.88 Hi-Pinion 29-Spline Zip Air Locker
Part Number: TGI-304517-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Ring and Pinion, 5.29 Hi-Pinion 29-Spline Zip Air Locker
Part Number: TGI-304518-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 4.88 Zip Air Locker
Part Number: TGI-304626-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 5.29 Zip Air Locker
Part Number: TGI-304627-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- V6 4.88 Zip Air Locker
Part Number: TGI-304636-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- V6 5.29 Zip Air Locker
Part Number: TGI-304637-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
4.88 V6 Zip Air Locker 29-Spline
Part Number: TGI-304106-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
5.29 V6 Zip Air Locker 29-Spline
Part Number: TGI-304107-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
4.88 4 Cyl, Zip Air Locker
Part Number: TGI-301561-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
5.29 4 Cyl, Zip Air Locker
Part Number: TGI-301562-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
4.88 V6, Zip Air Locker
Part Number: TGI-301563-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
5.29 V6, Zip Air Locker
Part Number: TGI-301564-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
4.88 HiP, Zip Air Locker
Part Number: TGI-301565-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
5.29 HiP, Zip Air Locker
Part Number: TGI-301566-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member, Assembled, Toyota 8 in. Case Style, Cast Iron Case, 5.29:1 Ratio Ring and Pinion, Front, Toyota, Each
Part Number: TGI-140045-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 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: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
5.29, V6, ARB, Polished
Part Number: TGI-301471-1-KIT
Not Yet Reviewed
Estimated Ship Date: Monday 1/12/2026
Estimated Ship Date: Monday 1/12/2026
Third Member, Assembled, Toyota 8 in. Case Style, High Pinion, Zip Locker, Cast Iron Case, 5.29:1 Ratio Ring and Pinion, Front, Toyota, Each
Part Number: TGI-301960-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Ring and Pinion, 4.88 Hi-Pinion 29-Spline ARB
Part Number: TGI-304513-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Ring and Pinion, 5.29 Hi-Pinion 29-Spline ARB
Part Number: TGI-304514-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- V6 4.88 ARB
Part Number: TGI-304632-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 11, 2026 if ordered today
Estimated Ship Date: Feb 11, 2026 if ordered today
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