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Sonnax Boost Valve Kit 34200-03K

Product Description For Sonnax Parts
Product Part No: -- 34200-03K
Transmissions: -- 4L80E 4L85E
Package and Weight
Package Quantity: -- 1 ea
Sonnax:High Performance Part - Boost Valve Kit
Base Price:
$27.12
Product Description
Part Information:
Fits '91-later units with factory-style sleeve. Can be retrofit to '89-91 units. See instructions for details.
  • Hardened steel boost valve has over 20% wider spools to provide better durability and increased sealing contact area:
  • Boost valve spools have annular grooves to reduce side loading that causes wear:
  • Valve and sleeve are manufactured to close tolerances to restore proper clearance and hydraulic integrity:
  • Kit includes a replacement aluminum balance oil plug with an O-ring to ensure proper sealing and adequate back pressure on the pressure regulator valve:
Part Contents
  1. Balance Plug with O-Ring:
  2. Boost Sleeve Factory style, no O-rings:
  3. Boost Valve:
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