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Complete Replacement 3rd Member for 2016-2023 Toyota Tacoma 8in Open Differential, 4.30 Ratio
The Yukon Gear YDATV6C-430 is a complete assembled third member dropout assembly for the Toyota Tacoma TV6C 8-inch rear differential with a standard open carrier and 4.30 gear ratio. This unit drops directly into the 2016-2023 Tacoma's 8-inch rear differential housing, replacing the ring and pinion, open carrier, and associated hardware as one complete assembled unit. The YDATV6C-430 is the correct assembly for open-differential Tacoma models using the smaller 8-inch rear end. The 4.30 ratio is a popular upgrade for Tacomas running 35-37 inch tires to restore cruise RPM and low-end torque delivery.
Key Features
- Complete Assembled 3rd Member — drop-in replacement for the Toyota TV6C 8-inch rear differential
- 4.30 Gear Ratio — ideal for 35-37 inch tire applications on open-differential Tacomas
- Standard Open Carrier — for Tacoma models without factory electronic locker
- Dropout Design — full third member replacement without removing the rear axle housing
- Yukon Gear Precision Manufacturing — quiet, long-lasting ring and pinion engagement
- Lifetime Limited Warranty — Magnuson-Moss Warranty Act protections apply
| Specification | Detail |
|---|---|
| Part Number | YDATV6C-430 |
| Brand | Yukon Gear and Axle |
| Differential Type | Toyota TV6C 8-inch Rear |
| Ring Gear Diameter | 8 inches |
| Gear Ratio | 4.30 |
| Carrier Type | Standard Open |
| Spline Count | 29 |
| Assembly Type | Complete 3rd member (dropout) |
| UPC | 883584217410 |
What's Included
- 1x Assembled Toyota TV6C 8-inch third member dropout unit (ring gear, pinion, open carrier, bearings)
This Part Fits
| Year | Make | Model | Notes |
|---|---|---|---|
| 2016 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2017 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2018 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2019 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2020 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2021 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2022 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
| 2023 | Toyota | Tacoma | 8-inch rear differential (TV6C), open carrier, no E-Locker |
Frequently Asked Questions
-
Q: How do I know if my Tacoma uses the 8-inch or 8.75-inch rear differential?
A: 2016-2023 Tacomas with the factory rear electronic locker use the larger 8.75-inch T8.75 housing. Open-differential models use the 8-inch TV6C unit. Check your build sheet or axle housing tag to confirm your axle type before ordering. -
Q: Is 4.30 a good choice for 35-inch tires?
A: Yes. A 4.30 ratio significantly improves low-end torque and helps maintain usable RPM at highway speeds when running 35-37 inch tires over the factory 3.73 or 3.91 ratios. -
Q: Can I use YDATV6C-430 to replace a T8.75 assembly?
A: No. The TV6C 8-inch and T8.75 assemblies are not interchangeable. They use different housings, carriers, and spline counts. Order the correct assembly for your specific axle. -
Q: Do I need to regear the front differential at the same time?
A: Yes, for 4WD applications the front and rear ratios must match. A complete front and rear regear is required to avoid driveline bind during 4WD engagement. -
Q: What gear oil is required?
A: Toyota specifies 75W-90 GL-5 synthetic gear oil for the TV6C 8-inch differential. Fill to the bottom of the fill plug hole. -
Q: Is professional installation required?
A: Professional installation is strongly recommended. Correct torque values and gear oil fill are critical. A drivetrain shop experienced with Toyota dropout differentials will provide the best results. -
Q: What is the warranty on YDATV6C-430?
A: Yukon Gear backs this assembly with a Lifetime Limited Warranty. Magnuson-Moss Warranty Act consumer protections apply. -
Q: How long does installation take?
A: A straightforward third member swap typically takes 2-4 hours for an experienced drivetrain technician. First-time installers should allow more time.
Installation Notes
- Drain the rear differential fluid before beginning
- Remove both rear axle shafts to allow third member extraction from the housing
- Unbolt and carefully withdraw the existing 8-inch third member
- Install the YDATV6C-430 and torque all fasteners to Toyota specification
- Reinstall axle shafts and fill with 75W-90 GL-5 gear oil to the fill plug level
- If regearing a 4WD Tacoma, match the front differential ratio to prevent bind in 4WD mode
California Prop 65 Warning
WARNING: This product can expose you to chemicals including lead and lead compounds, which are 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.
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