Revolution Gear & Axle 16-23 Toyota Tacoma 8.75in Rear Axle 4.88 Ratio Gear Package
This Revolution Gear & Axle package, REV-TACO-8.75-488, re-gears a 2016-2023 third-generation Toyota Tacoma that has the 8.75-inch rear axle to 4.88. Owners usually go looking for it after fitting larger tires: the truck feels flat pulling away from a light, the six-speed automatic hunts between gears on the highway, and fuel economy drops. Changing both axles to 4.88 puts the lost torque multiplication back so the truck drives like it did on stock-size tires.
The ring and pinion set the final drive ratio, the last multiplication between the driveshaft and the tires. A 4x4 Tacoma has two of them, an 8-inch independent front differential and a solid rear axle, and both must run the same ratio or the transfer case and driveline bind in 4WD. That is why this is a package rather than a single gear set. Per Revolution, it includes front and rear ring and pinion sets plus master install bearing kits for both differentials, with Timken bearings. The rear set is for the 8.75-inch housing with a 34-spline pinion; the front set is the 29-spline 8-inch IFS gear used across 2016-2023. The gears are 8620 steel and made in Korea.
Larger tires act like a taller gear. Your effective ratio is the axle ratio multiplied by the stock tire diameter, divided by the new tire diameter, so a tire about 10 percent taller cuts effective gearing about 10 percent. Going to 4.88 restores that loss for most tire upgrades while keeping highway rpm reasonable. If you run very large tires, carry heavy camping gear or crawl often, compare the 5.29 version of this Tacoma package, which multiplies torque about 8 percent more than 4.88 and turns the engine about 8 percent faster at any speed.
This package is only for trucks with the 8.75-inch rear. On the third-generation Tacoma, Toyota used the 8.75 axle on models with the factory rear electronic locker; open-differential trucks have the smaller 8-inch rear and need a different package. Check the axle code on the door-jamb compliance sticker: the fourth character is B for an E-locker. You can also look at the switch panel for the rear diff lock button. If your truck is 2WD, contact us first, because the front set would go unused.
The 2024 and later Tacoma uses a different driveline and is not covered. Send us your year and VIN if you want us to double-check before it ships. More axle parts are in our hard parts collection.
| Brand | Revolution Gear & Axle |
| Part number | REV-TACO-8.75-488 |
| Fits | Revolution Gear & Axle 16-23 Toyota Tacoma 8.75in Rear Axle 4.88 Ratio Gear Package |
| Vehicle fitment | Toyota Tacoma (2016-2023) |
| Type | Differential Install Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is built for 2016-2023 Tacomas with the 8.75-inch rear, which Toyota used on trucks with the factory rear electronic locker. Open-diff trucks have the 8-inch rear and need a different gear package.
Front and rear ring and pinion sets in 4.88 plus master install bearing kits for both differentials. The rear is the 34-spline 8.75-inch set and the front is the 29-spline 8-inch IFS set.
4.88 suits most tire upgrades and keeps highway rpm lower. 5.29 gives about 8 percent more torque multiplication for very large tires, heavy loads or slow technical trails, at about 8 percent higher engine speed at every road speed.
On a 4x4, yes. The front and rear ratios must match or the driveline binds when the transfer case is engaged. That is why the package includes both sets.
Break the gears in with gentle driving, change the gear oil early, and recalibrate the speedometer and transmission for the new ratio and tire size.
Only if you can set pinion depth, preload and backlash and read a contact pattern. Most owners have a driveline shop do it because both axles need full setup.
