Availability
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 62 Items.
4.88 HiP Detroit
Part Number: TGI-140038-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 V6 Spool 29-Spline
Part Number: TGI-304098-1-KIT
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
5.29 HiP Detroit
Part Number: TGI-140039-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 4cyl ARB
Part Number: TGI-140040-1-KIT
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 4cyl ARB 8.0
Part Number: TGI-140041-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 V6 ARB
Part Number: TGI-140043-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 HiP ARB
Part Number: TGI-140044-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 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 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
Third Member, Assembled, Toyota 4cyl, 8 inch Rear End, 4.88 Ratio, Detroit Locker
Part Number: TGI-140034-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 4cyl Detroit
Part Number: TGI-140035-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 V6 Detroit
Part Number: TGI-140036-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
Third Member, Assembled, Toyota V6 Case Style, Cast Iron Case, 5.29:1 Ratio Ring and Pinion, Toyota, Each
Part Number: TGI-140037-1-KIT
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 4cyl Spool
Part Number: TGI-140066-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 4cyl Spool
Part Number: TGI-140067-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 V6 Spool
Part Number: TGI-140068-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 V6 Spool
Part Number: TGI-140069-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 V6 ARB
Part Number: TGI-140240-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 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 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 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 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
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 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 4 Cyl, Grizzly
Part Number: TGI-301555-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 4 Cyl, Grizzly
Part Number: TGI-301556-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 V6, Grizzly
Part Number: TGI-301557-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
5.29 V6 Spool 29-Spline
Part Number: TGI-304099-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
4.88 V6 Detroit 29-Spline
Part Number: TGI-304100-1-KIT
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
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