Lubegard Instant Shudder Fixx transmission additive 2 oz. — 12-pack concentrated treatment, fast shudder relief

Lubegard Instant Shudder Fixx is a concentrated 2 oz. transmission additive that stops torque-converter lock-up shudder quickly when added to automatic transmission fluid.

If your automatic transmission is exhibiting a shudder, judder or vibration under light acceleration or while cruising, this ready-to-use 2 oz. bottle delivers a high-strength dose of friction modifiers to smooth clutch engagement. Formulated to be compatible with both conventional and synthetic ATFs, each 2 oz. treatment is five times more concentrated than standard friction-modifier products, so a single site-specific application can restore smooth operation without dropping the pan or flushing the fluid. It’s sold here in a convenient 12-pack for fleet use, multiple vehicles, or service-shop inventory.

How quickly will I notice reduced shudder after adding it?

Many drivers report immediate improvement in torque-converter lock-up shudder after the product circulates and reaches the clutch surfaces. Actual time depends on fluid temperature and engine speed, but improvements commonly appear during the next drive cycle.

• Designed for fast dispersion into the ATF during normal operation
• Concentrated formula accelerates effective coverage of clutch surfaces
• Often noticeable within minutes to a few miles of driving

Will this work with my transmission fluid and vehicle?

Instant Shudder Fixx is formulated to be compatible with most automatic transmission fluids, both conventional and synthetic, making it suitable for a wide range of domestic and imported vehicles. It is not suitable for Ford Type F or continuously variable transmissions (CVTs), so check your owner’s manual if your vehicle requires those fluids.

• Safe with most ATFs—both conventional and synthetic
• Not recommended for Ford Type F or CVT applications
• Ideal as a targeted treatment rather than a substitute for fluid changes

How much product do I need and how is it applied?

Each 2 oz. bottle supplies a concentrated treatment intended for a single application in typical passenger-car and light-truck transmissions. Application is straightforward: add the bottle into the transmission fluid through the dipstick tube or fill port according to the vehicle manufacturer’s instructions, then drive to circulate.

• One 2 oz. bottle per treatment—sold here as a 12-pack for multiple uses
• Add via dipstick tube or fill port while engine is running per service guidelines
• No drain or pan removal required for most applications

Can using this replace routine transmission maintenance?

This additive is intended as a corrective supplement for shudder symptoms and should not replace scheduled fluid and filter service. For persistent issues, professional inspection and possible fluid replacement may be necessary to address wear or contamination.

• Effective as a symptom corrector, not a substitute for fluid changes
• Helps restore friction characteristics between clutch plates
• Follow up with diagnostic checks if problems continue after treatment

Who is this for: Lubegard Instant Shudder Fixx 2 oz. (12 Pack) is aimed at technicians, fleet managers, and vehicle owners who need a fast, concentrated remedy for automatic transmission shudder in conventional or synthetic ATF systems. It’s especially useful for service shops that want an on-hand, high-strength treatment to address customer complaints quickly, while being mindful to avoid Ford Type F and CVT-equipped vehicles.