OE plastic accumulators are prone to breaking and have poor sealing qualities, and metal rings currently offered with aftermarket accumulators also have issues with sealing. Sonnax accumulator piston kit 22841-04K for Chrysler 727, 904, 42-46-47-48RH/RE transmissions features a stronger piston made from anodized billet aluminum and a dual seal design. The piston’s PTFEs seals prevent piston-to-bore contact and the D-rings vastly improve sealing compared to aftermarket steel rings.
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