The Tacoma rear differential takes 3 to 4 quarts of 75W-85 GL-5 gear oil depending on whether you have the electric locker (TRD Off-Road and Pro) — and unlike older Tacomas, modern A-Trac and e-locker trims do NOT need LSD-specific fluid.
The Tacoma rear axle has gone through a quiet revision that catches owners out. Pre-2009 Tacomas with mechanical limited-slip differentials called for 80W-90 LSD gear oil with friction modifier built in. From 2009 onward, the rear axle specification moved to 75W-85 GL-5 conventional gear oil — Toyota part number 08885-02506, the same fluid used in the front diff. The change reflects the move from mechanical LSDs to the electric locker (e-locker) on TRD trims and A-Trac brake-based traction control on the rest of the lineup. Neither system needs LSD-spec fluid.
If you have a 2nd gen (2005-2015) or 3rd gen (2016-2023) Tacoma in TRD Off-Road, TRD Pro, or any non-LSD trim, use the 75W-85. The only Tacomas that still need LSD fluid are early 2005-2008 trucks specifically optioned with the mechanical LSD — uncommon and identifiable by the LSD badge on the differential cover or in the build sheet. When in doubt, check the door jamb sticker for axle code or call your dealer with the VIN.
Capacity is where Tacomas split. Standard rear axles (no rear locker) hold 2.9 to 3.1 liters (about 3 to 3.3 quarts). E-locker rear axles hold more — 3.8 to 4.0 liters (4 to 4.2 quarts) — because the locker mechanism takes up space differently in the housing. Buy 4 quarts and have a spare in the garage rather than running out mid-fill.
Like every Toyota differential, the right approach is to pump until fluid runs out the fill hole, then stop. Park as level as you can manage; tilt changes apparent fill level.
The plugs are 24mm hex on most 2nd and 3rd gen trucks (some early 2nd gen used a 10mm internal hex). They are torque-spec'd — overtightening crushes the soft aluminum drain plug bosses and creates a leak that's expensive to fix. Spec is 36 ft-lb for fill and drain plugs, and you should use new crush washers each service.
Service interval is 30,000 miles for severe use (tow, off-road, dusty conditions) and 60,000 miles for normal use. If you wheel where water gets above the axle tubes, change immediately after — water destroys ring-and-pinion gears within a few hundred miles.
| Part | Vendor | Est. price |
|---|---|---|
| Toyota OEM 75W-85 GL-5 Differential Gear Oil LT (1 quart) | Toyota | ~$18 |
| Toyota OEM 75W-85 GL-5 (alternate part #) | Toyota | ~$18 |
| Toyota OEM fill/drain crush gasket | Toyota | ~$2 |
| Valvoline SynPower 75W-90 GL-5 (1 quart, alternate) | Valvoline | ~$13 |
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.