4R70W Accumulator Pistons

The Ford AODE and the 4R70W have a common issue with the 2-3 accumulator, they go bad.

To address this issue the accumulator now comes bonded. These parts will retrofit all the way back to 1980 covering the AOD, AODE, 4R70 and 4R75 series transmissions.

When replacing the 1-2 and the 2-3 accumulators in this unit here is what you need:

1-2 Accumulator Piston part number 76927B
1-2 Accumulator Cover part number 76929A
2-3 Accumulator Piston par number 76932EA

While in the unit most of my clients also change the the Low/Reverse Servo Piston and Cover.

For the low-reverse piston you will need to identify it by the amount of grooves at the end of the piston.

76912 has one groove.
76912A has two grooves
76912B has three grooves

76914 is the cover and works with any of the three pistons. So you will need one of the pistons (depending on the grooves) and one cover. 

There are several options for the accumulator springs and are color coded.  Once you have the color identified head over to our site and in the search box type 79926 to see the different springs.