Use the fluid your transmission’s maker specifies: most GM automatics use Dexron VI, newer GM ten-speeds use Dexron ULV, Ford’s older four-speeds use Mercon V while its six-speeds use Mercon LV and its ten-speed Mercon ULV, and Chrysler and Ram automatics use ATF+4. The chart below lists the fluid for the transmissions we carry. Always confirm against your owner manual, because specifications can change with model year and service bulletins.
Transmission fluid type chart
| Transmission | Maker | Specified fluid |
|---|---|---|
| 4L60E, 4L65E, 4L70E | GM | Dexron VI (replaces Dexron III) |
| 4L80E, 4L85E | GM | Dexron VI |
| 6L80E, 6L90E | GM | Dexron VI |
| 10L80 | GM | Dexron ULV (ultra-low viscosity) |
| Allison 1000 | Allison / GM | An Allison-approved fluid or the Dexron fluid GM specifies for the truck |
| 4R70W, 4R75W | Ford | Mercon V |
| E4OD, 4R100 | Ford | Mercon V |
| 6R80, 6R140 | Ford | Mercon LV |
| 10R80 | Ford | Mercon ULV |
| 46RE, 47RE, 48RE | Chrysler / Ram | ATF+4 |
| 545RFE, 66RFE, 68RFE | Chrysler / Ram | ATF+4 |
| 62TE | Chrysler / Dodge | ATF+4 |
Each code links to its page, where the fluid is listed with the gear ratios and the units we carry.
What transmission fluid does a 4L60E or 4L80E take?
GM specifies Dexron VI for the 4L60E family and the 4L80E, and Dexron VI replaces the earlier Dexron III. For capacity and change steps on the 4L60E, see 4L60E fluid capacity and type.
What about older GM transmissions like the 700R4 and TH350?
Older GM automatics were originally filled with earlier Dexron fluids. GM lists its current Dexron fluid as the replacement for earlier Dexron specifications, but confirm with your service information, especially on rebuilt or modified units; see 700R4 vs 4L60E.
Can you mix transmission fluids?
Avoid it. Fluids differ in viscosity and friction properties, and the wrong fluid can cause shift problems and shudder, especially in modern six-, eight- and ten-speed transmissions designed for low-viscosity fluids. “Multi-vehicle” fluids claim to cover several specifications; check that the bottle lists your exact specification.
Why ULV and LV fluids matter
Newer transmissions use thinner fluids to cut internal drag and improve fuel economy, and their clutches and valve bodies are calibrated for them. Using an older, thicker fluid in a ten-speed can cause harsh or delayed shifts; see transmission shifting hard.
Checking and changing fluid
Many newer transmissions have no dipstick and are checked at a fill plug at a set temperature. See how to check transmission fluid, how to change transmission fluid, how often to change it and transmission fluid color, and the wider guide to transmission fluid types.
More guides: checking fluid without a dipstick.
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