How to Replace Transmission Fluid?
3 Answers
Replacing transmission fluid involves the following steps: 1. Start the engine to warm up the transmission to operating temperature; 2. Remove the drain plug; 3. After all the old fluid has drained, reinstall the plug; 4. Add new ATF fluid; 5. Start the engine, shift through P, N, D, L1, L2 gears, pausing for at least 5 seconds in each; 6. Check if the automatic transmission fluid level is normal. Transmission fluid is used to keep the gear system clean, lubricate and prolong the life of transmission components. It provides effective lubrication even at low temperatures and reduces fluid loss under harsh operating conditions.
Changing transmission fluid is a step-by-step process. First, lift the car and remove the oil pan, using a plastic bucket to catch the old fluid which is sticky and has a burnt smell. Be careful not to damage the threads when removing the bolts. After taking off the oil pan, you'll see the filter screen—replace it with a new one while you're at it. Use a degreaser to thoroughly clean the sludge from the inner walls of the oil pan; otherwise, adding new fluid would be pointless. Apply sealant evenly, and when reinstalling the bolts, use a torque wrench—over-tightening can cause deformation. Finally, pour in the new fluid through the filler hole, making sure to use ATF or CVT-specific fluid that meets the manufacturer's specifications. After everything is done, start the engine and let it run for ten minutes, cycling through each gear before checking the dipstick level for accuracy. If you're doing it yourself, prepare all the tools and set aside half a day for the job.
As an experienced driver, I've changed transmission fluid three times. First, decide whether to use the gravity method or a flush machine - DIYers usually opt for gravity change. Essential tools include a jack, wrench set, drain pan, and new fluid. Locating the drain plug is crucial as positions vary by model. Warm up the car for five minutes before draining to improve fluid flow. After complete drainage, remove the pan to replace the filter - using a magnet works well for collecting metal shavings. I always install a new gasket when reassembling. Pour fresh fluid slowly to prevent air bubbles. After starting, test shift smoothness by driving through gears, then recheck fluid level at operating temperature. The key lies in following proper procedures throughout.
