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Rear Differential

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Why a Toyota 8.4-inch rear axle when the TRD truck came with an 8.0-inch rear with Toyota E-Locker? The 8.0 has proven it doesn’t stand up well to the extra weight of new FJ Cruisers and Tacomas and Toyota is reticent to fix failures under warranty. Tacoma Sport models come with the larger 8.4-inch rearend, which is much stronger and accepts most aftermarket differentials.