Liqui Moly ATF Additive 250 ml — Transmission seal conditioner to restore rubber seals, reduce leaks and improve shifting

If your automatic transmission or power steering shows signs of oil loss, hard or brittle seals, noisy steering, or rough shifting, an ATF seal conditioner can be a cost-effective way to restore function and delay major repairs. Liqui Moly’s ATF Additive (250 ml, SKU 5135) is formulated to soften and regenerate seals, clean ducts and small passages, and support the base oil’s performance without changing the required fluid specifications.

How does this additive help seals and stop gearbox leaks?

Liqui Moly’s formulation targets aging rubber and plastic components, replenishing flexibility to shrink cracks and improve sealing contact. By restoring pliability, the additive can reduce seepage around gaskets and shaft seals, helping to mitigate slow leaks that often cause fluid loss.

• Softens hardened rubber and plastic seals to improve sealing
• Reduces oil loss from minor gaps and permeation
• Works without replacing the transmission fluid type

Will it improve shifting smoothness and steering noise?

Yes—by cleaning small ducts and stabilizing the fluid film, the additive helps dampen harsh or abrupt gear changes and reduces squeaks or whining from the power-steering system. Users typically notice smoother engagement and quieter steering after treatment when applied according to instructions.

• Cleans deposits in valves and narrow passages to restore hydraulic function
• Dampens shift shocks for more consistent gear changes
• Reduces power-steering noise caused by dry or stiff seals

How do I use the 250 ml bottle—what vehicles and amounts?

The 250 ml bottle is a concentrated dose intended to be added to the transmission or power steering reservoir with the recommended fill level. It’s suitable for many passenger cars and light-duty vehicles; always check vehicle manufacturer guidelines and follow the product dosing instructions on the label.

• Designed as a single-treatment dose for typical automatic transmissions
• Add directly to the transmission or power-steering reservoir while fluid is warm
• Refer to vehicle manual and product label for exact dosage and precautions

What maintenance benefits can I expect and how long do they last?

Using Liqui Moly ATF Additive can extend the service life of seals and reduce the frequency of fluid top-ups, potentially lowering repair costs. The durability of effects depends on driving conditions, vehicle age, and the extent of seal degradation—regular inspections are still recommended.

• Helps maintain seal flexibility to delay replacement
• Supports cleaner hydraulic passages and more consistent fluid performance
• Contributes to lower long-term repair and maintenance expenses

Who is this for: Liqui Moly ATF Additive 250 ml is aimed at drivers and technicians seeking a targeted, preventive, or restorative treatment for transmissions and power-steering systems showing early to moderate seal hardening, minor leaks, or degraded shifting and steering behavior. It’s ideal for owners who prefer to try a chemical seal-conditioning approach before pursuing more invasive repairs, and for professional shops offering maintenance services to preserve drivetrain components.

Features

• Prevents oil loss
• Regenerates seals, cleans and protects
• Improves steering characteristics and reduces noise
• Dampens shifting operations and protects from wear
• Lowers repair costs and lengthens service life