Transmission Products

Automatic Transmission Stop Leak

Cost Effective and Efficient Solution to Repair Automatic Transmission Leaks.

The Problem

As mileage accumulates, both the internal and external seals in an automatic transmission shrink, harden and lose their elasticity. This causes oil leaks resulting in overall fluid loss and internal pressure losses affecting the precise fluid flow required for proper operation of the transmission. Extended periods of stop and go driving contribute to fluid oxidation and deposit build-up in the valves and small passages inside the transmission. This will cause problems in shifting, including potential shuddering and slippage.

The Solution

BARDAHL Automatic Transmission Stop Leak is specially formulated to quickly and effectively stop minor seal and gasket leaks by softening and swelling all types of rubber and elastomeric seals. Additional detergents and dispersants remove existing deposits restoring proper valve action and fluid flow. Automatic Transmission Stop Leak includes anti-wear agents and antioxidants that improve protection and help prevent future deposits and leaks to extend the life of the transmission.


  • Eliminates transmission leaks while driving
  • Conditions and revitalizes old seals that have lost their pliability
  • Restores proper valve action and helps improve shifting performance
  • Removes harmful deposits and extends the life of the transmission
  • Compatible with all types of automatic transmission fluids, including synthetics



Add one bottle of Automatic Transmission Stop Leak into the fluid reservoir through the pour spout. Do not overfill. The solution will work while the vehicle is in operation and best results are achieved after several hundred miles of driving. Dispose of any used or unused solution in accordance with the local, state and federal regulations.

Product Specifications

  • Product & Size
    6018 - 16 oz (473 ml)
  • Case Qty/Wt
    12 / 12.6 lbs
  • UPC Code
    0 76906 06018 9
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    Bardahl Manufacturing Corporation

    P.O. Box 70607 Seattle, Washington  98127
    1400 N.W. 52nd Street, Seattle, Washington  98107

    Phone: (888) 227-3245
    Fax: (206) 784-3219
    Customer Service: (888) 227-3245

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