Q: How to replace the transmission fluid and filter on Ford Focus?
A: Before beginning work, purchase the specified transmission fluid and a new filter. The filter will come with a new pan gasket and seal. The fluid should be drained immediately after the vehicle has been driven. More sediment and contaminants will be removed with the fluid if it's hot. After the vehicle has been driven to warm up the fluid, raise it and support it on jackstands. Position a drain pan capable of holding six quarts under the transaxle. Be careful not to touch any of the hot exhaust components. There is no transaxle fluid drain plug. Remove all of the pan bolts except for the three at the driver's side. Unscrew the three remaining bolts two turns, but leave them in place to support the pan. Using a plastic scraper tool to separate the silicone sealant, separate the pan from the transaxle case and allow the fluid to drain out. Try not to splash fluid as the gasket seal is broken and the pan is detached. Once the fluid has drained, remove the three bolts and detach the pan. Scrape all traces of the old gasket from the pan and the transaxle case, then clean the pan with solvent and dry it with compressed air. DONOT use a rag to wipe out the pan. Disconnect the transmission fluid temperature sensor electrical connector. Remove the filter bolts and detach the filter. Discard the filter and the seal. Attach the new seal to the new filter, then bolt the filter to the transaxle. Apply a small bead of RTV sealant around the flange of the pan.then hold the pan against the transaxle case and install the bolts. Tighten the pan bolts to the torque in a criss-cross pattern. Work up to the final torque in three steps. Don't overtighten the bolts or the pan flange could be distorted and leaks could result. Lower the vehicle, and allow the RTV sealant time to cure. With the engine off, fill the transaxle with fluid. Use a funnel to prevent spills. It is best to add a little fluid at a time, continually checking the level with the dipstick. Allow the fluid time to drain into the pan. Start the engine and shift the selector into all positions from Park through Low, then shift into Park and apply the parking brake. With the engine idling, check the fluid level. Lower the vehicle.drive it for several miles, then recheck the fluid level and look for leaks at the transaxle pan.