Auto Transmission Stop Leak 325ml

Product code: WYN64558

10 in stock

GBP new

£13.99

£11.66 ex. VAT

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Wynns Auto Transmission Stop Leak is a specialized additive designed specifically to stop and prevent leaks in automatic transmission systems. This effective 325ml formula contains advanced seal conditioners and revitalizers that rejuvenate hardened, shrunk, or deteriorated transmission seals and gaskets, helping to reduce or eliminate fluid leaks without requiring mechanical repair. The non-clogging formula is compatible with all automatic transmission fluids and won't interfere with normal transmission operation while providing a cost-effective solution for addressing fluid leakage.

Key Features

• Seal Conditioning: Revitalizes and expands dried or shrunk rubber seals and gaskets
• Leak Reduction: Effectively stops or reduces transmission fluid leaks
• Compatible with All ATF: Works with conventional and synthetic transmission fluids
• Non-Clogging Formula: Won't harm transmission components or valves
• Preventative Maintenance: Helps maintain seal elasticity in aging transmissions
• Fluid Loss Prevention: Decreases ATF loss through external leaks
• Environment Protection: Prevents fluid spots on driveways and parking areas
• Cost-Effective Solution: Fraction of the cost of mechanical seal replacement
• Easy Application: Simply adds to transmission fluid
• Long-Lasting Effect: Continues working throughout the fluid service interval

How to Use

Add entire contents to the transmission fluid through the dipstick tube or fill port when the fluid is at normal operating temperature. One 325ml bottle treats most passenger vehicle transmissions (up to 8-10 quarts of fluid capacity). Drive normally, cycling through all gears, allowing the product to circulate through the transmission system. Results may begin to show within 100-200 miles of driving, with maximum effectiveness typically achieved within 300-500 miles. For preventative maintenance in high-mileage transmissions, use with every other fluid change. For active leaks, a second treatment may be used after 1,000 miles if needed.

Auto Transmission Stop Leak is particularly valuable for addressing common transmission fluid leaks from pan gaskets, front pump seals, extension housing seals, and other external seals without requiring expensive mechanical repairs. This product is ideal for older, high-mileage vehicles where seal shrinkage is common. Not recommended for repair of damaged or cracked components or severe leaks requiring mechanical attention. Not recommended for CVT (Continuously Variable Transmissions) or DCT (Dual Clutch Transmissions) unless specifically stated as compatible on the packaging.