Bar's Products Automatic Transmission Fluid Additive
Bar's Products Automatic Transmission Fluid Additives
Few names in chemical automotive repair carry the credibility of Bar's Products (also known as Bar's Leaks). With more than 75 years of history and tens of millions of customers served, the brand has built its reputation on practical, pour-in solutions that address real-world transmission problems — without the need for a full rebuild. Their lineup of automatic transmission fluid additives reflects that same no-nonsense engineering philosophy.
Two Purpose-Built Formulas for Automatic Transmissions
Bar's Products offers two standout products in this category, each targeting a specific set of transmission symptoms:
- High Mileage Automatic Transmission Repair (Part #1400) — Designed specifically for higher-mileage vehicles, this 16.9 oz. formula tackles the cumulative wear that aging transmissions develop. It reduces rough shifting and friction, eliminates slip, helps control operating temperature, and addresses shudder, chatter, and whining noises that commonly develop over time.
- Trans Fix (Part #1415) — An advanced synthetic-blend treatment that works across all transmission types — automatic, manual, CVT, DCT, eCVT, and transaxle configurations, for both domestic and imported vehicles. It is notable for being formulated to work in all types and colors of transmission fluid, making compatibility a non-issue for most drivers.
What Sets Bar's Products Apart in This Category
The engineering behind these additives goes beyond a simple stop-leak formula. Both products incorporate multiple functional layers working together in the fluid. Seal conditioners recondition and protect transmission seals to stop existing leaks and prevent future ones. Extreme pressure and anti-wear agents address metal-to-metal friction to stop slipping, jerking, and hard shifts. Advanced cleaning detergents with dispersants and antioxidants work to remove accumulated sludge and varnish from internal components. A performance additive booster helps renew worn bands, manage fluid degradation from heat, reduce noise, and extend transmission life.
Perhaps the most practical advantage is speed of action — Bar's Products Trans Fix begins working immediately upon installation, with most drivers noticing results within 250 miles or three days of driving. The High Mileage Transmission Repair formula similarly shows results in approximately 100 miles or two days of normal driving.
Who Should Use These Products
These additives are well-suited for drivers dealing with early-stage transmission symptoms: slipping gears, hesitation on upshifts, rough or delayed engagement, shudder, or a minor fluid leak. They are not a replacement for a mechanical overhaul on severely damaged units, but for transmissions experiencing performance decline due to fluid degradation and seal wear, Bar's Products offers a cost-effective first line of defense. The universal compatibility of Trans Fix, in particular, makes it a practical option for mixed-fleet owners or anyone dealing with an obscure transmission type.
Explore the full Bar's Products brand page for their complete range of automotive chemical solutions, or browse all automatic transmission fluid additives to compare options across brands.