Can You Regear a Tacoma Just by Buying a Locker With a Higher Ratio?
Verify fitment with the merchant before you buy.
Reviewed by DoesItFit Editorial · How we evaluate compatibility
NO—A LOCKER DOES NOT SET AXLE RATIO
No. A locker replaces or changes differential action; the ring-and-pinion gear set determines axle ratio. Choose the locker and the target ring-and-pinion as a matched, axle-specific system—especially where the locker manufacturer specifies a ratio range or carrier break.
Drivetrain-parts snapshot
| Component/decision | What it controls | Required check |
|---|---|---|
| Ring-and-pinion set | Axle gear ratio | Match the exact axle and target ratio. |
| Locker/differential carrier | How differential action is controlled | Match axle, spline/application and any carrier-break ratio range. |
| Bearings, seals and setup hardware | Correct installation and preload/backlash setup | Use the component makers' current instructions. |
| Locker advertised with a ratio range | Does not itself perform the regear | Still choose a separate compatible ring-and-pinion set. |
Locker choice and gear-ratio choice are different decisions
Yukon describes the carrier as the differential component the ring gear bolts to, while its ring-and-pinion installation material covers setting the gear mesh. See Yukon's differential technical FAQ and ring-and-pinion installation instructions. In plain terms: a locker may replace the carrier, but it does not itself supply a “higher gear ratio.” The ratio comes from the selected ring-and-pinion set.
That distinction means a real regear normally has at least these separate choices:
- the truck's exact axle and differential configuration;
- the target ring-and-pinion ratio;
- a locker that is approved for that axle and, where applicable, that ratio range; and
- the installation hardware and setup required by the component makers.
Why the exact axle and ratio still matter
ARB states that exact gear ratio is critical because some lockers are divided by gear-ratio ranges, often called carrier breaks. Its Tacoma application page also directs buyers to identify the exact axle and use the Air Locker application guide for the right part number. Read ARB's Tacoma locker guidance.
ARB's application chart defines a ratio range such as “and up” as the stated ratio and numerically higher ratios, and it identifies carrier-bearing and ring-gear variables. See the Air Locker application guide. That is why “Tacoma locker” is not enough to choose a part: a factory rear locker, axle variant, ring-gear size, spline count and target ratio can change the application.
A safe buying sequence
1. Identify the actual axle
Use the VIN, axle code, factory documentation or a qualified driveline specialist to identify the front or rear axle and whether the truck has a factory locking differential. Do not infer it from trim alone.
2. Choose the target ratio as a ring-and-pinion decision
Select a ring-and-pinion set made for that axle and target ratio. The cited manufacturer documents do not recommend a ratio for a particular tire size or use case, so this guide does not prescribe one.
3. Match the locker to the axle and ratio range
Use the locker manufacturer's current application guide. If it divides parts at a carrier break, select the correct locker for the target ratio range—not simply the truck's former ratio.
4. Treat installation as precision driveline work
Ring-and-pinion setup requires correct backlash, contact pattern, preload and hardware procedures. Yukon's instructions describe this adjustment work; it is not a bolt-on shortcut. Use a qualified shop and the current instructions for every part installed.
Bottom line
You cannot regear a Tacoma by buying a locker “with a higher ratio.” The ring-and-pinion set sets the ratio; the locker must be compatible with the exact axle and applicable ratio range. Verify both parts together before purchase and have the differential set up by a qualified driveline technician. After differential work, keep fluid selection component-specific; see the 2023 Tacoma differential-fluid example.
Sources & notes
- Yukon differential technical FAQ, accessed 2026-09-05. Manufacturer explanation of the carrier as the component to which the ring gear bolts.
- Yukon ring-and-pinion installation instructions, accessed 2026-09-05. Manufacturer setup documentation covering ring-and-pinion installation and gear-mesh adjustment; not a Tacoma-specific ratio recommendation.
- ARB Air Locker Tacoma guidance, accessed 2026-09-05. Manufacturer guidance that Tacoma locker selection depends on exact axle and gear ratio, with possible carrier breaks.
- ARB Air Locker application guide, accessed 2026-09-05. Manufacturer application chart explaining ratio ranges and application variables; confirm the latest exact part number with ARB before purchase.