LIQUI MOLY Transmission Cleaner LM20224 — 1L ATF Flush, Restores Smooth Shifting & Clears Deposits
Dirty, deposit-laden automatic transmission fluid is one of the most overlooked causes of rough shifting, hesitation, and premature transmission wear — and a simple fluid drain without a pre-flush leaves the worst of those deposits behind. LIQUI MOLY's Pro-Line Automatic Transmission Cleaner is a highly effective pre-service flush formulation that dissolves and suspends stubborn varnish, sludge, and debris from inside the transmission before the ATF drain, so your fresh fluid goes into a clean system. When old ATF is changed without a pre-flush, accumulated deposits remain on valve bodies, solenoids, and clutch packs — contaminating the new fluid immediately and continuing to cause shifting problems. ⚡ The professional-grade ATF flush used in repair shops before every quality transmission service. Part LM20224 is the genuine LIQUI MOLY Pro-Line formulation that gently cleans without attacking rubber seals or plastic components, restoring optimum shifting performance and extending transmission life.
LIQUI MOLY Transmission Additive LM20224
Is This the Right Part?
Confirm the complete model number before ordering. Similar parts may use different connectors, dimensions, hose positions, electrical ratings, or mounting points.
- ✔ Your vehicle has an automatic transmission (not CVT or manual)
- ✔ You are performing or scheduling an ATF fluid change
- ✔ Your transmission uses standard ATF (compatible with most ATF types)
- ✔ You want to maximize the effectiveness of your fresh ATF by flushing deposits first
- Rough, jerky, or delayed gear shifts — especially 1–2 or 2–3
- Transmission hesitates or slips when accelerating from a stop
- ATF is dark brown, burnt-smelling, or overdue for a change
- Shifting has become noticeably worse over time despite no mechanical fault
- Previous ATF change didn’t fully resolve shifting complaints
- Part Number: LM20224 (also referenced as 20224)
- Type: Pro-Line Automatic Transmission Pre-Service Flush / ATF Cleaner
- Volume: 1 Litre
- Coverage: 1L treats 6–9 litres (1.6–2.4 gal.) of ATF
- Brand: LIQUI MOLY
- Compatible With: Most automatic transmission fluids; ideally paired with LIQUI MOLY Gear Tronic ATF (Part# 7917)
- Safe For: Rubber seals, plastic components, and all internal transmission materials
- Use: Professional repair shop use recommended
A standard ATF drain only removes 40–60% of the old fluid — the rest stays trapped in the torque converter, valve body, and cooler lines. Without a pre-flush, those deposits immediately contaminate your fresh ATF. Using LM20224 before the drain suspends and removes that residual contamination, so your new fluid starts clean and stays clean longer. It’s a $35 step that protects a $3,000–$8,000 transmission.
Part Details
Use a qualified technician when diagnosis or installation is outside your experience. Gas parts should be installed by a licensed technician.
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