Sonnax Pinless 1-2 Or 3-4 Accumulator Piston Kit For 700R4, 4L60E, 4L65E, 4L70E – 77998-03K

If you're building a 700R4 or 4L60E transmission and want it to shift right, this Sonnax pinless accumulator piston is a must.

It's part number 77998-03K, and it replaces the stock 1-2 or 3-4 accumulator pistons that like to hang up or wear out.

The pinless design eliminates bore wear and gives you consistent shifts every time.

It's made in the USA by Sonnax Industries, so you know it's top quality.

Just keep in mind: this listing is for ONE piston, and most transmissions will need two kits (one for 1-2 and one for 3-4).

It comes with the aluminum piston, rubber/Teflon seals, and steel balls.

Hardware not included.

A solid upgrade for any 4L60E, 4L65E, or 700R4 build.