Low fluid symptoms
Slipping, delayed engagement, whining, and overheating, plus how to tell a low level from worn-out fluid.
Read the guideTransmission fluid resources
These pages answer the questions that come up before a fluid change: what the warning signs mean, what the color on the dipstick is telling you, how often the fluid needs replacing, and which fluid family your transmission actually takes.
Every answer here is written to be true across makes and models. When a question comes down to your specific vehicle, the page points you at the lookup that returns the current recommendation for your year, make, model, and engine.
Guides and answers
Each page below covers one question in depth. To confirm what a specific vehicle takes, run it through the AMSOIL vehicle lookup guide.
Fluid color chart
Read the dipstick like a gauge. What red, brown, black, pink, and foamy fluid each tell you.
Read the guideFluid leaks
Pan gaskets, cooler lines, and axle seals. How to locate a leak by position and decide what to do next.
Read the guideWhich fluid type
Six fluid families, what separates them, and why using the wrong one causes shudder and slipping.
Read the guideChange intervals
Why heat matters more than mileage, what counts as severe service, and how to set a realistic interval.
Read the guideChecking the fluid
Warm or cold, dipstick or fill plug. The correct procedure and how to read what you find.
Read the guideWhere to start
If something is wrong right now, begin with the symptoms page and the color chart. Between them they cover the great majority of transmission complaints, and both are written so you can reach a conclusion in a few minutes with nothing but a rag and a flashlight.
If nothing is wrong and you are planning maintenance, start with the fluid type page to confirm which family your transmission takes, then use the interval page to decide when the change is due. Those two answers together are usually all you need before ordering.
Shop by transmission type
When you know which fluid family you need, the category pages group every formula with specs, package sizes, and ordering links. Automatic covers conventional automatics along with CVT and dual-clutch fluid, manual covers synchromesh fluid and gear lube, and powersports covers dirt bikes, V-twins, ATVs, and UTVs.