And even though you’ll read about 100,000 mile transmission flush intervals with ZF units, It’s important to note that this is only a guideline. 30,000 to 60,000 mile intervals can only be beneficial for the health of your ZF transmission. If you notice any signs of transmission trouble, such as slipping gears or delayed shifting, you The common automatic transmission fluid change interval for the GMC Sierra is every 30,000-60,000 miles depending on condition of the fluid. For “severe” use such as towing often, hauling heavy weight, or sitting in stop and go traffic, it’s better to change the fluid every 30-45,000 miles. The web page explains how to determine how often to change transmission fluid depending on your vehicle and driving habits, and the factors that affect fluid life. It also provides tips on checking your fluid level, changing fluid in a filled-for-life transmission, and choosing the right fluid for your vehicle. Once you clear 100k total miles, if you have a notoriously picky transmission (especially if fluid changes are easy), I would up this to 30k fluid changes. My Odyssey is one such beast with tons of trans issues, so every other oil change (around 20k or so) I drain what comes out and refill with fresh fluid; about 3.9 quarts. Step 5: Fitting the new transmission gasket and filter. The new filter should be easily reattached either as a press fit or secured with the locating bolt. Make sure the filter is secure before looking to reattach the transmission pan and gasket. When replacing the gasket, you may require a gasket sealant. How often should I change my transmission fluid? You should definitely change it at the recommended mileage regardless of whether you have a manual or an automatic transmission. Manual: Most manufacturers recommend that manual transmission fluid be changed every 30,000 to 60,000 miles. Under heavy-duty use, some manufacturers suggest changing If you have never changed it, change out a small bit at a time - drain and fills of the transmission pan, about 3 1/2 quarts at a time, and space out the changes a few weeks to a month apart. After 4 of those, you should have mostly new fluid in there and the transmission will be happy with it being introduced to new fluid slowly. Change Fuel Filter(s) 10,000 miles: 16,000 km: Replace Air Filter: Check Filter restriction gauge. Replace as necessary. Check Filter restriction gauge. Replace as necessary. Flush Cooling System: Every 40-50,000 miles or once a year. 64-80,000 km or once a year. Replace Auto Transmission Fluid: 30,000 miles: 48,000 km: Replace Manual Or royal purple. Just had my 2006 Civic EX transmission worked on. Honda dealer tech said the new auto tranny fluid will be good for about 50K miles. My buddy that owns an independent Honda/Acura repair shops recommends to change the fluid every 20K miles. He said at about $40 a change its cheap insurance. Step 1 – Warm up the transmission. Turn your car on, then move your transmission lever through the gears, pausing 30 seconds in each: from park, to reverse, neutral, and drive. Take the car for a ride and drive it at least 10 minutes, so all the fluid is circulating and warm. Cycle through reverse, and neutral again, then put it in park and RPz4wUB.