OEM Casting numbers on the top of the Housing

8684428 or 24219937

(NOT After Market)

4L60E 1-2 ACCUMULATOR PISTON ASSEMBLY 

WILL RETRO FIT ALL 

Transmission Models

4L60E, 4L65E, 4L70E

From: 1993-UP

1-2 ACCUMULATOR ASSEMBLY 

IT IS READY TO INSTALL

INCLUDES:

NEW OEM UPDATED 

1-2 ALUMINUM Accumulator Piston 

REPLACES the plastic type.

-Brand New O-ring

1-2 Accumulator Housing 

8684428 or 24219937

1-2 HARDENED Springs

On GM 4L60Es

Automatic transmission often has a worn accumulator piston pin hole or

 a broken plastic accumulator piston

1-2 harsh shifting or 2-1 downshifting 

is a very commom problem on 4L60s.

It is common for the 1-2 plastic accumulator piston to wear or crack,

damaging the accumulator housing and finally breaking the 1-2 springs

This causes 1-2 hard shifting , fluid leak resulting in delayed engagement, slippage, burning friction clutches or burning the 2-4 band.

To prevent 1-2 hard shifting

Transgo made a oem 1-2 UPGRADE replacement aluminum piston.

1-2 aluminum piston accumulator replace the 1-2 plastic piston

and it is thicker than OE plastic piston that breaks and wears out premature.

 

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