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A518 A618 46RH 46RE 47RH 47RE Transmission Pump Kit
O-Ring seal between pin and 2nd Gear piston
GM 4L80-E and 4L85-E pumps have end plugs at the pressure regulator and TCC shift valves that seal signal oil required to stroke the valve
Sonnax recommends bore sizing tool 96206-BST*
Brand: ATS
4L80E 4L85E Transmission Boost Valve O-Ring Style Sonnax 34200-01K Featured Products A518 A618 46RH 46RE 47RHManufacturer Part Number: 34200 01K Brand: Sonnax Fitment Type: Direct Replacement Manufacturer Warranty: Yes 4L80 E, 4L85 E Boost Valve Kit Part No. 34200 01K O Ring style. Kit can be retrofit to back to '89 units. See instructions for details. Common problems in vehicles with GM 4L80 E and 4L85 E transmissions are uncontrollable line rise (upward of 500 600 psi), high line pressure in Reverse, buzzing noise, broken direct clutch drums and or broken
