(LARGE PIN SIZE) GM 700R4, 4L60/65/70E 1-2 and 3-4 ACCUMULATOR PISTON .310

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 larger .310 (large pin) accumulator piston. On some later models, the OE manufacturer will have both a .310 (large pin) and a smaller .236 (small pin) [part number SC-74927AK-SP]. If this is the case, you will need one of each.