Transmission Fluid Checks

If you have a vehicle with automatic transmission, you should check the transmission fluid levels once a month. This is done quite easily using a dipstick. However, if you have a manual transmission, then the levels can only be checked by crawling under the car and removing a fill plug; most people simply ask the auto shop to check the levels when the car is serviced.

Checking the Levels

Automatic transmission fluid should be checked while the engine is running. This means that you should be particularly careful when working under the hood; remove any items of clothing that may dangle into the engine, such as a scarf, tie or necklace.

1. Park your vehicle on a level surface and engage the parking brake.
2. Start the vehicle, shift to drive (D) and then shift back to park (P).
3. With the engine still running, open and secure the hood.
4. Locate the transmission dipstick; this is usually behind the oil dipstick, and may have a brightly colored handle. If in any doubt, check the owner's manual for its location.
5. Remove the transmission dipstick, wipe it clean with a clean lint-free rag and then reinsert it fully back into its place.
6. Check the fluid level against the markings on the dipstick. If the level is low, then you will need to top the fluid up.

If the fluid level is very low, it may mean that you have a leak in the system, from a crack or a worn seal. This may also be indicated by a reddish-brown oily patch where you park; if so, get the system checked out by an auto shop as soon as you can.

Topping Up the Transmission Fluid

If you need to top up the transmission fluid, you must use the transmission fluid specified in the owner's manual; incorrect transmission fluid can destroy the transmission.

1. Add a small amount of the fluid through the dipstick pipe.
2. Wait for a few minutes to allow the fluid to settle.
3. Recheck the level again, and add more fluid if necessary.
4. Do not overfill; this may cause problems with your transmission.