Sonnax offers Allison 1000/2000/2400 series lockup front cover AL-CC-2 with one-piece semi-solid mounting ring. The increased strength of this cover has been achieved by using a one-piece forging with increased thickness in critical areas. The mounting surface has also been strengthened by creating a semisolid, one-piece ring design. The center thrust area is ground and parallel to accept turbine hubs with bearings, fiber or bimetal washers. This cover also incorporates a higher register to salvage shortened impeller covers.

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