Automatic Transmission and Power Steering Stop Leak and Conditioner

Wynn’s Automatic Transmission and Power Steering Stop Leak and Conditioner is an oil soluble supplement developed to stop and prevent leaks and ease shifting of automatic gearboxes and power steering systems.

  • Stops and prevents leaks in automatic transmissions and power steering systems.
  • Revitalizes rubber seals and O-rings.
  • Cleans and protects the system by means of detergents and dispersants.
  • Smoothens and quietens gear changes.
  • Prevents ageing and oxidation of automatic transmission and power steering fluids.
  • Prolongs the lifetime of the components.
  • Reduces power steering whine.
  • Prolongs the life of automatic transmission fluid.


Can be added to all conventional ATF and power steering fluids meeting Dexron and Mercon (Ford) or equivalent specifications.


Automatic gearboxes: add contents of the 325 ml can to gearbox via filler cap or dipstick orifice.
Power Steering: do not overfill: add 5 % by volume of fluid to reservoir.


PN 64559 – 24x325 ml - EN



City traffic, traffic jams and short drives lead to higher stress on today’s vehicles engines. Combined with too long oil change intervals, this can result in a premature degradation of oil properties and the engine components can cease to function normally in the oil system. Good lubrication is essential for your engine, but for some components such as the turbo it is crucial! Poor lubrication of the turbo can result in it jamming or being destroyed.

Oil System