SunCoast is proud to offer you a very unique and innovative solution for your accumulator issues on the General Motors 700R4/4L60/65/70E platforms. These units are plagued with bore wear that cause accumulator leaks, resulting in a poor-performing transmission unit.
These new patent-pending 1-2 and 3-4 accumulator pistons are engineered with a unique blue high-performance material along with a superior seal design. These new accumulator pistons' sealing design allows for conforming to slightly eccentric accumulator bores. This results in a remarkably better sealing performance than the OE replacement. This is a must on older, high-mileage rebuilds.
Technical Note: This is the smaller .236 (small Pin) accumulator piston. On some later models the OE manufacture will have both a .236 (small pin) and a smaller .310 (large pin) [part number SC-74927K-SP]. If this is the case you will need one of each.
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