QA1 Shock Piston - Linear/Digressive - Twintube Style - Gray HSCHD11SASM61 or a trans brake

or a trans brake

Red and Blue

4L60 / 4L80

1975-1990 Ford E-150 Econoline

High Amperage/7 Circuit/Ignition Hot

QA1 Shock Piston - Linear/Digressive - Twintube Style - Gray HSCHD11SASM61 or a trans brakeThese pistons have flat linear compression and digressive rebound with up to 0. 056" of preload to generate low speed control without excessive high speed forace, helping you maintain grip over surface irregularities. Used on both dirt and asphalt cars, these pistons can generate the force numbers you're looking for to keep the left rear up or keep the front end sealed off. The amount of shim stack preload, shim thickness, and diameter are all able to