Longfield 29-Spline Toyota 8” Ring & Pinion Gears with 29-Spline Flange Kit

This is the easiest and most affordable way to upgrade your Toyota 8" differential with stronger 29-spline Ring & Pinion gears. Includes your choice of Longfield 29-Spline Ring & Pinion gears along with our 29-Spline Quadruple-Drilled Differential Flange with dust shield, 29-spline Trail-Safe™ Pinion Seal, and 29-spline pinion nut. High-pinion sets also include a high-pinion oil slinger.

What makes Longfield Ring & Pinion Gears the best on the market?

Better Materials: We use heat-treated 8620 chromoly tool steel for strength and wear resistance.

Better Gear Teeth: We only use the 5-cut process on the ring gear teeth instead of the cheaper 2-cut process used by most other aftermarket vendors. The 5-cut process results in teeth with a tapered tooth profile. This increases contact area and spreads the contact load along a wider area, resulting in less stress on the ring gear teeth.

Better Machining: The gear teeth are cut using Gleason CNC hobbing machines & cutters. Gleason gear-cutting technology produces an unprecedented level of accuracy and surface finish, which allows the gears to transmit more torque and improve fuel efficiency. The higher accuracy and surface finish also produces a quieter-running gear set, which means they will work great on the daily driver too.

Better Finish: All Standard Finish ring gears are black phosphate coated for wear resistance & corrosion protection. The black phosphate coating provides a microporous layer on the surface to hold lubricants to minimize friction between gear teeth. This results in less wear during the initial break-in period and increases the overall life of the gears.

Better Value: We go directly to Tier 1 OEM manufacturers to have gears made to our exact specifications. By cutting out the middlemen, we can offer the highest quality gears at a competitive price.

On Toyota trucks we recommend 4.88's for 33" tires and 5.29 for 35" and larger.

RING & PINION BREAK-IN PROCEDURE

All new 3rd members require a break-in period to prevent damage from overheating. Any overloading or overheating during these 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.

Specifications:

• Made from tool-grade 8620 steel and heat-treated for maximum strength and wear resistance.
• The gear teeth are cut using Gleason CNC hobbing machines & cutters. Gleason gear-cutting technology produces an unprecedented level of accuracy and surface finish, which allows the gears to transmit more torque and improve fuel efficiency.
• Higher accuracy and surface finish also produces a quieter-running gear set.
• Gear teeth are cut using the 5-cut process to increase contact area to reduce load distribution and reduce stress on the gear teeth.
• Black phosphate coating on ring gear to reduce friction & wear during break-in.
• Pinion Spline: 29-Spline
• Ring Gear Bolts: 10 bolts (Ring Gear Bolts not included)
• Ring Gear Diameter: 8”
• Ring Gear Rotation (4-Cyl & V6): Standard
• Ring Gear Rotation (Hi-Pinion): Reverse
• Includes forged chromoly 29-spline Quadruple-drilled flange with dust shield, 29-spline Trail-Safe™ Pinion Seal, and 29-spline pinion nut
• Dust shield pre-installed onto flange
• High-pinion sets also include a high-pinion oil slinger.

Flange is Quadruple drilled with the most popular Pickup/4Runner & Tacoma Patterns:

• 66mm x 66mm x 11mm (Tacoma)
• 60mm x 60mm x 10mm (Pickup/4Runner and TG Heavy Duty Driveline)
• 60mm x 68.3mm x 10mm
• 61.5mm x 70mm x 10mm

Fitment:

• 1979-1985 Toyota Pickup - Front & Rear, 4-CYL & V6
• 1986-1995 Toyota Pickup - Rear Only, 4-CYL & V6
• 1984-1985 Toyota 4Runner - Front & Rear, 4-CYL & V6
• 1986-1995 Toyota 4Runner - Rear Only, 4-CYL & V6
• 1979-1985 Toyota Pickup - Front Only, HI-PINION
• 1984-1985 Toyota 4Runner - Front Only, HI-PINION
• 1990-1997 Toyota Land Cruiser FJ80 - Front Only, HI-PINION
• 1991-1997 Lexus LX450 - Front Only, HI-PINION

Notes:

• Will not fit 7.5" IFS front axles or 8” IFS Clamshell front axles.

Compatible Lockers