Fluid Types
Types of Transmission Fluid Explained
ATF, CVT fluid, DCT fluid, and manufacturer-specific specs like Dexron-VI, Mercon LV, and ATF+4 — what the transmission fluid types are and how to pick the right one.
Quick answer
The main transmission fluid types are automatic transmission fluid (ATF) for conventional automatics, CVT fluid for continuously variable transmissions, DCT fluid for dual-clutch gearboxes, and manual transmission fluid for manuals. Within ATF there are specific specs — Dexron-VI (GM), Mercon LV (Ford), ATF+4 (Chrysler), Toyota WS, Honda DW-1, and more. Always use the exact spec your manufacturer requires; the wrong fluid can cause shudder or damage.
Updated July 1, 2026 · 6 min read
Walk into a parts store and the wall of transmission fluids can be baffling. Here's how the types break down.
The main categories
- ATF (Automatic Transmission Fluid) — for conventional (planetary) automatics.
- CVT fluid — for continuously variable transmissions.
- DCT fluid — for dual-clutch transmissions.
- Manual transmission fluid — for manuals (sometimes ATF, sometimes gear oil).
These are not interchangeable — each is engineered for a different mechanism.
ATF specifications
Within ATF, manufacturers require specific specs tuned to their transmissions:
- Dexron-VI — GM/Chevrolet
- Mercon LV — Ford
- ATF+4 — Chrysler/Jeep/Dodge
- Toyota WS, Honda DW-1, and other OEM fluids
"Multi-vehicle" fluids
Some fluids claim coverage of multiple specs. These can be convenient, but always confirm the bottle is approved for your exact requirement — not just "compatible."
How to choose
- Check the owner's manual or the fluid cap/dipstick.
- Match the exact spec it lists.
- When in doubt, use the OEM fluid.
Wondering if you can top up with a different fluid? See can you mix transmission fluid?
Frequently asked questions
How do I know which transmission fluid my car needs?+
Check your owner's manual or the fluid cap/dipstick, which usually lists the required specification (for example Dexron-VI, Mercon LV, ATF+4, or a CVT/DCT fluid). Using the exact spec matters — these fluids are not universally interchangeable.
Is all automatic transmission fluid the same?+
No. ATF comes in many specifications tuned to specific transmissions' friction and viscosity needs. 'Multi-vehicle' fluids cover several specs, but you should confirm the fluid you buy is approved for your exact requirement.
What's the difference between ATF, CVT, and DCT fluid?+
ATF is for conventional automatics, CVT fluid is for belt/chain continuously variable transmissions, and DCT fluid is for dual-clutch gearboxes. They're engineered differently and are not interchangeable.
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