The smart, economical way to improve shift quality!

A long shift may feel smooth, but it slips the clutch packs, which increases heat and accelerates wear. BD’s exchange accumulator kit for 1995-2003 E40D and 4R100 automatic transmissions improves the life of your stock transmission by reducing the time between shifts. Our accumulators feature revised oil passages and lapped mating surfaces that prevent cross-leaks. A new pan gasket and filter is also included to make this a smart, clean and economical transmission upgrade.