Lubegard Instant Shudder Fixx automatic transmission friction modifier — 2 oz. dose, 12-pack, concentrated formula

Lubegard Instant Shudder Fixx is a concentrated friction modifier that stops torque‑converter lockup shudder quickly when added to automatic transmission fluid.

If your automatic transmission exhibits judder, slipping hesitation, or rough engagement at idle or low speeds, a targeted friction modifier can often restore smooth operation without a full fluid flush. Lubegard Instant Shudder Fixx comes as a 2 oz. dose in a 12‑pack, formulated to be compatible with conventional and synthetic automatic transmission fluids. It's engineered to be five times more concentrated than standard friction modifiers so a single dose treats most passenger vehicle transmissions. Note: do not use in Ford Type F or continuously variable transmissions (CVT).

How quickly will I notice reduced shudder after adding this product?

Most users experience improvement almost immediately after treating the transmission and running the engine through a few drive cycles. Performance may vary depending on the severity of the condition and how well the product is mixed into the ATF.

• Immediate chemical action on clutch friction surfaces
• Visible smoothing after a few drive starts and stops
• Works without removing the pan or changing fluid in many cases
• Follow dosage guidelines for best results

Will this work with my vehicle’s transmission fluid?

Lubegard Instant Shudder Fixx is compatible with both conventional and synthetic automatic transmission fluids and is intended for use in most modern automatic transmissions. However, it is not suitable for Ford Type F fluids or CVT systems, so check your owner’s manual before use.

• Safe with common ATF formulations (Dexron, Mercon alternatives, etc.)
• Not for Ford Type F or CVT applications
• One 2 oz. dose is concentrated — treat per vehicle capacity guidelines
• Works as an additive; does not replace recommended service intervals

How do I add Lubegard Instant Shudder Fixx and what precautions should I take?

Adding the product is straightforward: park on level ground, warm the transmission to normal operating temperature if possible, then add the 2 oz. dose to the transmission fluid according to the vehicle manufacturer’s refill procedure. Avoid overfilling and follow safety precautions when working near a running engine.

• Warm vehicle and locate transmission fluid fill point or dipstick tube
• Add the full 2 oz. dose per treatment instructions; do not exceed recommended amounts
• Start engine and cycle through gears to distribute additive through the converter
• Dispose of empty containers properly and keep out of reach of children

How long will the effect last and can I repeat treatments?

The duration of benefit depends on transmission condition and driving habits; many users report lasting improvement for months, while others may choose to reapply during routine service if symptoms return. Because the formulation is concentrated, repeated use should follow manufacturer recommendations and consider overall fluid condition.

• Results vary with clutch wear and fluid age
• Safe to reapply as part of maintenance if symptoms reoccur
• Consider fluid inspection if frequent reapplications are needed
• Not a substitute for mechanical repairs when parts are worn

Who is this for: Lubegard Instant Shudder Fixx is intended for vehicle owners, fleet managers, and professional technicians looking for a fast, concentrated friction modifier to address torque converter shudder in automatic transmissions that use conventional or synthetic ATF. It’s ideal for those wanting a non‑invasive solution before committing to fluid changes or mechanical service, provided the vehicle does not require Ford Type F fluid or use a CVT. Always verify compatibility with your transmission specification and consult a technician if you’re unsure.