When it’s time to replace factory axle seals for your Jeep JK Front D30/44 Axle Housing and 03-06' TJ/LJ D30/44 Axle Housing, Synergy has you covered. Easily replace seals to increase performance and stop any leaks. Included are (2) Seals – and if you have Synergy Inner Axle Sleeves installed this product is recommended.