Yukon Gear High Performance Gear Set For Toyota V6 in a 4.56 Ratio

Yukon Gear Ring and Pinion Set for Toyota V6 Differential in 4.56 Ratio

The YG TV6-456-29 from Yukon Gear and Axle is a high-performance ring and pinion gear set engineered for the Toyota 8-inch V6 rear differential using a 29-spline pinion. This gear set covers a broad lineup of Toyota trucks and SUVs from 1985 through 2019, including the 4Runner, Tacoma, Tundra, Pickup, T100, FJ Cruiser, and the Lexus GX470. The 4.56 ratio provided by the YG TV6-456-29 is one of the most popular regear options for Toyota builds running 33-to-37-inch tires, restoring factory-feel throttle response and low-range crawl performance after a body lift or suspension modification. Yukon machines this set from high-grade steel alloy and tests it in two in-house labs to verify tooth geometry, surface finish, and load capacity. When paired with a front axle gear change, the YG TV6-456-29 gives your Toyota balanced 4WD performance from rock crawling to highway cruising.

Key Features and Benefits

• 29-Spline Pinion: Correct specification for Toyota 8-inch V6 rear differential carriers 2003 and newer
• 4.56 Gear Ratio: Ideal for correcting speedometer error and restoring torque after fitting oversized tires
• Wide Vehicle Coverage: Fits 4Runner, Tacoma, Tundra, Pickup, T100, FJ Cruiser, and Lexus GX470
• High-Grade Steel Alloy: Premium material machined to precise tolerances for long-term durability
• Advanced Surface Finish: Tooth geometry reduces friction and heat under continuous trail and towing use
• Dual Lab Testing: Every gear set inspected for dimensional accuracy before shipping
• Y.E.S. Plan Eligible: Lifetime no-questions-asked warranty upgrade available

Fitment

Specs

What Is Included

• Ring gear
• Pinion gear
• Pinion nut

Frequently Asked Questions

• Q: What differential does the YG TV6-456-29 fit?
  A: It fits the Toyota V6 8-inch rear differential in listed 4Runner, Tacoma, Tundra, Pickup, T100, FJ Cruiser, and Lexus GX470 vehicles from 1985 to 2019.
• Q: Why does this part number end in "-29"?
  A: The 29 designates the 29-spline pinion count, which is the correct spline count for 2003-and-newer Toyota V6 8-inch carriers. Older applications used a 23-spline pinion and require a different part number.
• Q: Do I need to change the front differential too?
  A: In 4WD applications you must match the front differential ratio to the rear. Consult a front axle gear set listing for your specific front differential type.
• Q: What tire sizes benefit most from the 4.56 ratio?
  A: Vehicles running 33-to-37-inch tires with a factory 3.90 or 4.10 ratio see the greatest benefit from the YG TV6-456-29, recovering lost low-range torque and highway RPM balance.
• Q: Can my factory warranty be voided by installing the YG TV6-456-29?
  A: Under the Magnuson-Moss Warranty Act, a dealer cannot deny a warranty claim unless they prove the aftermarket gear set directly caused the failure.
• Q: What other parts do I need?
  A: Plan on a Toyota V6 8-inch master install kit with bearings, races, seals, and shims, plus gear marking compound and measurement tools.
• Q: What is the warranty on the YG TV6-456-29?
  A: One year against manufacturing defects. Yukon also offers the Y.E.S. plan for lifetime no-questions-asked protection.
• Q: Is professional installation necessary?
  A: Yes. Proper gear setup requires precise pinion depth adjustment, backlash measurement, and contact pattern verification that demand specialized tools and experience.

Installation Instructions

1. Safely lift and support the vehicle. Drain differential gear oil.
2. Remove the rear driveshaft and axle shafts after marking orientation.
3. Pull the differential cover and clean the housing completely.
4. Record existing backlash and pinion preload with a dial indicator.
5. Remove bearing caps and carrier assembly with the old ring gear.
6. Press off old pinion bearings and install new bearings from the master install kit.
7. Shim pinion depth to achieve the correct tooth contact position per the Yukon spec sheet for the YG TV6-456-29.
8. Press the new ring gear onto the carrier and torque ring gear bolts in a cross pattern to factory specification.
9. Set carrier preload and adjust backlash to 0.006 to 0.010 inch using side bearing shims.
10. Verify gear contact pattern with marking compound and adjust pinion depth or backlash as needed.
11. Apply RTV or gasket to cover and reinstall. Fill with the correct Toyota limited-slip or open differential fluid.
12. Reinstall axle shafts and driveshaft, torqueing all fasteners to specification.
13. Complete the Yukon break-in procedure before sustained towing or off-road use.

Proposition 65 Warning: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.