Fluid Types
ATF+4 Transmission Fluid: What It Is & Uses
ATF+4 is Chrysler's automatic transmission fluid spec for Chrysler, Dodge, Jeep, and Ram. Here's what it is, which vehicles need it, and why substitutes cause problems.
Quick answer
ATF+4 is Chrysler's automatic transmission fluid specification, used in most Chrysler, Dodge, Jeep, and Ram automatics. It's a synthetic-based fluid with specific friction characteristics, and Chrysler transmissions are known to be sensitive to it — using a non-ATF+4 fluid commonly causes shuddering and harsh shifts. Always use a fluid licensed to the ATF+4 spec.
Updated July 1, 2026 · 4 min read
Own a Jeep, Ram, Dodge, or Chrysler? ATF+4 is almost certainly your spec — and it's one to take seriously.
What ATF+4 is
ATF+4 is Chrysler's synthetic-based automatic transmission fluid specification, with a long service life and carefully tuned friction characteristics.
Which vehicles use it
Most Chrysler, Dodge, Jeep, and Ram automatics specify ATF+4. Note that some Jeeps use ZF transmissions with their own fluid — so always confirm in the manual.
Why substitutes cause trouble
Chrysler transmissions are notably sensitive to fluid. Using a non-ATF+4 fluid frequently produces shuddering, harsh shifts, or slipping, because the friction properties don't match. This is a spec where "close enough" isn't good enough.
Buying it right
Look for the ATF+4 license on the bottle, not just a "compatible with ATF+4" claim. When in doubt, use genuine Mopar ATF+4.
Other makes use different specs — Dexron-VI (GM), Mercon LV (Ford). For the overview, see types explained, and before combining fluids read can you mix transmission fluid?.
Frequently asked questions
What vehicles use ATF+4?+
Most Chrysler, Dodge, Jeep, and Ram automatics specify ATF+4. Some Jeep models with ZF transmissions use a different ZF fluid, so confirm your exact requirement in the owner's manual.
Can I use regular ATF instead of ATF+4?+
No. Chrysler transmissions are sensitive to fluid friction characteristics, and using a non-ATF+4 fluid commonly causes shuddering and poor shifts. Use only fluid licensed to the ATF+4 specification.
Is ATF+4 synthetic?+
ATF+4 is a synthetic-based fluid with a long service life and specific friction properties. Look for the ATF+4 license on the bottle rather than a generic 'compatible' claim.
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