$5 Off Your $100 Mobile App Purchase - Get the App

Make/Model Search
Make/Engine Search

Brands
Savings Central
Contact Us
Help Center
1-800-230-3030

Call Us
My Garage
Wish List
Order Status & Returns

Welcome
My Account

Order Status

Wish List
Savings Central
Shop by Brand
Shop Your Passion
- Shop Your Passion
- Truck / SUV
  
  Jeep®
  
  Restoration
  
  Stock Replacement
  
  Late Model Muscle
  
  Tools
  
  Gifts, Clothing, & More
  
  Circle Track
  
  Street Rod
  
  Powersports
  
  Paint & Body
  
  Marine
  
  Jr Dragster
Gift Cards
My Garage
See Our Catalogs
News & Events
Career Opportunities
Contact Us
Help Center
1-800-230-3030 1-800-230-3030
New Products
Shop by Make/Model
Sign In

Search Make/Model

Search Make/Engine

Sign In

Welcome
Account Dashboard
Profile
Order Status & Returns
Buy It Again
Wish List
Rewards Program
Gift Cards & Summit Bucks
Address Book
My Garage Settings
Email Preferences
Text Notifications
My Reviews
My Questions
Catalogs
Tax Exemption
Sign In

$5 Off Your $100 Mobile App Purchase - Get the App

Summit Racing Gift Cards - ALWAYS the Perfect Gift!

Filters

In Stock
- In Stock Items, Including at a Supplier. Ships In a Few Days. (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Case Style
- Toyota 4-cylinder (8) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Toyota V6 (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Ring and Pinion Ratio
- 4.88:1 (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 5.29:1 (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Carrier Style
- ARB Air Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Detroit Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Spool (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Yukon Grizzly Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Yukon Zip Air Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
- $1500-$2000 (2)
- $2000-$5000 (8)
In Stock
Savings Central
- Free Shipping (8)

Selected Filters

Home
Transmission & Drivetrain
Third Member Complete Assembly
Product Results

Complete Third Member and Center Sections

Availability

- In Stock Items, Including at a Supplier. Ships In a Few Days. (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Case Style
- Toyota 4-cylinder (8) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Toyota V6 (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Ring and Pinion Ratio
- 4.88:1 (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 5.29:1 (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Carrier Style
- ARB Air Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Detroit Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Spool (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Yukon Grizzly Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Yukon Zip Air Locker (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
- $1500-$2000 (2)
- $2000-$5000 (8)
Savings Central
- Free Shipping (8)

Complete Third Member and Center Sections

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.

Differential Identification Charts

Not sure what you’ve got back there? Visit Summit’s Help Center for our rear-end identification guides.

Even More Complete!

Need the matching axles, too? Consider a complete rear end assembly!

Top Brands

No third party resellers here—Summit Racing only partners with trusted manufacturers like Moser, Strange Engineering, Trail Gear, and Currie Enterprises.

Showing In Stock Items. Show All 10 Items.

Individual Parts

Part Groups

Results 1 - 10 of 10

Trail-Gear Assembled Super Finish Third Members 304620-1-KIT

Trail-Gear Assembled Super Finish Third Members 304620-1-KIT

Trail-Gear Assembled Super Finish Third Members 304620-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 4.88 Detroit

Part Number: TGI-304620-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304621-1-KIT

Trail-Gear Assembled Super Finish Third Members 304621-1-KIT

Trail-Gear Assembled Super Finish Third Members 304621-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 5.29 Detroit

Part Number: TGI-304621-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304622-1-KIT

Trail-Gear Assembled Super Finish Third Members 304622-1-KIT

Trail-Gear Assembled Super Finish Third Members 304622-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 4.88 ARB

Part Number: TGI-304622-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304623-1-KIT

Trail-Gear Assembled Super Finish Third Members 304623-1-KIT

Trail-Gear Assembled Super Finish Third Members 304623-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 5.29 ARB

Part Number: TGI-304623-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304624-1-KIT

Trail-Gear Assembled Super Finish Third Members 304624-1-KIT

Trail-Gear Assembled Super Finish Third Members 304624-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 4.88 Grizzly

Part Number: TGI-304624-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304625-1-KIT

Trail-Gear Assembled Super Finish Third Members 304625-1-KIT

Trail-Gear Assembled Super Finish Third Members 304625-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- 4cyl 5.29 Grizzly

Part Number: TGI-304625-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304626-1-KIT

Trail-Gear Assembled Super Finish Third Members 304626-1-KIT

Trail-Gear Assembled Super Finish Third Members 304626-1-KIT

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 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304627-1-KIT

Trail-Gear Assembled Super Finish Third Members 304627-1-KIT

Trail-Gear Assembled Super Finish Third Members 304627-1-KIT

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 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304628-1-KIT

Trail-Gear Assembled Super Finish Third Members 304628-1-KIT

Trail-Gear Assembled Super Finish Third Members 304628-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- V6 4.88 Spool

Part Number: TGI-304628-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Trail-Gear Assembled Super Finish Third Members 304629-1-KIT

Trail-Gear Assembled Super Finish Third Members 304629-1-KIT

Trail-Gear Assembled Super Finish Third Members 304629-1-KIT

Third Member Complete Assembly, Assembled 29-Spline Super Finish 3rd Members For Toyota 8" Axles- V6 5.29 Spool

Part Number: TGI-304629-1-KIT

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

1

Page 1 of 1

Modal Header

Contact us with questions.

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify

Stay Updated with Emails from Summit Racing

Never miss a sale on new parts, tools, and more!

= Required

First Name

Last Name

Email Address Email required

See Our Catalogs

News & Events

News & Events Home
OnAllCylinders (blog)
Calendar of Events
New Product Releases
Summit Racing News
News You Can Use
Featured Vehicles
Media Center
Sanctioning Bodies

Help

Help Center
Return Policy
Beat-A-Price Guarantee
Payment Options
Contact Us

Social

Facebook
X/Twitter
Instagram
Pinterest
YouTube
Podcast

About Summit

Corporate History
Retail Locations

My Account

Profile
Email Preferences
Order Status & Returns
Wish List
Address Book
My Reviews
My Questions
My Garage
Sign In

Career Opportunities

More

Summit Racing Credit Card
Gift Cards
Calculators & Tools
Promo Exclusions
Become an Affiliate
Summit Racing Rewards Program
Summit Racing Equipment Protection Plan

Terms of Use | Privacy and Security | Site Accessibility
Copyright 2025 by AUTOSALES, INCORPORATED
dba Summit Racing Equipment | Trademarks

Let's Build it Together^™

Modal Header