Description
4L80E TH400 Low / Reverse Servo Piston Sonnax 34914-01. Fits all TH400 and 1995-earlier 4L80E. OE Part Number 24232745
OE cast aluminum servo pistons can be brittle and are prone to breaking. Sonnax Low / Reverse servo piston 34914-02 for GM ’96-later 4L80-E transmissions is a direct replacement upgrade made from high-strength, billet aluminum to prevent failure.
