TRAXXAS 8280 TRX 4 AO DIFFERENTIAL COVER Gray differential cover for TRX-4 ® and TRX-6 ® models. Fits front or rear differentials on TRX-4, front only on TRX-6. Replacement part for these models: TRX-4® Ford® Bronco® TRX-4® Land Rover® Defender® Unassembled TRX-4® Kit Accessory part for these models: TRX-4® 1972 Chevrolet® Blazer® High Trail Edition ™ 1979 Chevrolet® Blazer® by TRX-4® TRX-4® 1979 Ford® Bronco® Edition TRX-4® Chevrolet® K10 High Trail™ TRX-4® Equipped with Traxx® Edition TRX-4® Ford® F-150 ® High Trail™ TRX-4® Sport Edition High Trail™ TRX-4® Sport Mercedes-Benz® G 63® AMG 6X6 RC Hauler TRX-6® Ultimate