Assembled 29-Spline 3rd Members For Toyota 8″ Axles- W/TrueTrac



Fully built 29-Spline 3rd members using all new parts and ready to drop into your axle.  Third members feature top quality high-strength 29-spline ring & pinion gears and your choice of lockers.  V6 units feature larger OEM style V6 gear sets with longer pinion gear.  Each unit is setup with solid pinion spacers for long gear life.  Trail-Safe 29-spline pinion seal provided at no extra charge.  Quadruple-drilled flange covers most Pickup/4Runner and Tacoma driveshaft patterns.
Housing Ratio Spool Detroit ARB Grizzly Zip TrueTrac
4Cyl 4.88 304113-1-KIT 304115-1-KIT 304117-1-KIT 304119-1-KIT 304121-1-KIT TGI-308383
4Cyl 5.29 304114-1-KIT 304116-1-KIT 304118-1-KIT 304120-1-KIT 304122-1-KIT TGI-308384
V6 4.88 304098-1-KIT 304100-1-KIT 304102-1-KIT 304104-1-KIT 304106-1-KIT TGI-307328
V6 5.29 304099-1-KIT 304101-1-KIT 304103-1-KIT 304105-1-KIT 304107-1-KIT TGI-308386
High Pinion 4.88 304511-1-KIT 304513-1-KIT 304515-1-KIT 304517-1-KIT TGI-307327
High Pinion 5.29 304512-1-KIT 304514-1-KIT 304516-1-KIT 304518-1-KIT TGI-308388
Application Notes:  Spool lockers should only be used in rear applications.  Spools will be harder on axles than a selectable or automatic locker.  Fully built 3rd members will not fit stock Tacoma or T100 axles.
All new 3rd members require a break-in period to prevent damage from overheating. Any overloading or overheating during this periods can cause the gear oil to break down resulting in ring & pinion failure.
• After installation, drive lightly for 20-30 minutes and then allow the diff to cool for at least two hours.
• Avoid heavy throttle use during the first 500 miles.
• Do not tow a trailer during the first 500 miles.
• Change oil after 500 miles to remove any particles suspended in the oil.
This may seem unnecessary, but it is very easy to damage the differential by loading it before the gear set is completely run in. New ring & pinion gears create excess heat when they are new. This excess heat can damage the heat treatment of the gears.

Note:  V6 Housings do not have an ABS sensor port and are not compatible with the factory ABS system

Additional information

Weight 68 lbs
Dimensions 19 × 13 × 13 in
Diff Housing

4cyl, High Pinion, V6

Gear Ratio

4.88, 5.29


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