The Tundra has more than one differential, and they don't all take the same fluid. Each axle's exact gear oil spec and capacity is below, plus where to buy it.
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Front differential
Gear oil spec
75W-85 GL-5 (Toyota Genuine Differential Gear Oil LT)
Front differential (4WD models).
Spec from the OEM (oem manual).
Capacity
2.2 qt
Confirm against your manual
Rear differential
Gear oil spec
75W-85 GL-5 (Toyota Genuine Differential Gear Oil LT)
Rear differential. Capacity by engine/body: 1UR-FE 4.9 qt (4.60 L); 3UR-FE/3UR-FBE Double Cab — standard bed 3.8 qt, long bed 4.0 qt; CrewMax — 2WD 4.0 qt, 4WD 3.8 qt.
Spec from the OEM (oem manual).
Capacity
3.8 qt
Confirm against your manual
Transfer case
Gear oil spec
SAE 75W (Toyota Genuine Transfer Gear Oil LF)
Transfer case (4WD models). Toyota Genuine Transfer Gear Oil LF, SAE 75W.
Spec from the OEM (oem manual).
Capacity
1.6 qt
Confirm against your manual
Spec anchored to the OEM owner's manual; the capacity, when it carries the verified badge, is cross-checked against an independent source. Never changed by what an affiliate link pays us. Your owner's manual is always the final word — and if your axle has a locker or an option package, double-check the capacity for your exact build.
