First of all, as the fuel pump pushes fuel out of a modern car’s tank, air to replace that volume is provided via an internal canister that’s part of the evaporative emissions system. But yes, there have been changes made to the vehicles. Most car owners know about the importance of changing their engine oil on time. But feel free to get as close to empty as you dare. This is a very good question, as there are a lot of different theories as to whether to change or not to change. Winds NW at 10 to 20 mph. Question: is it really a good idea to change the trans fluid on a car/truck that has a high mileage and the fluid was never changed? If new fluid cut this sludge loose I could definitely see it causing problems . Often times aftermarket parts can be very high... Hey there. Been reading mixed opinions on flushing Transmission at Higher Mileages if the history of the vehicle is unknown. I think the stories of transmissions dying after changing the fluid are old wives' tales -- I've done several and never had a problem -- but if you're worried about it, that might be a good in-between option. So if you don’t, and you go 198,000 miles and never change it, then a fresh change can sometimes make it slip. Post and Courier And that’s why he decided to change the transmission fluid in the first place! Topic starter Hello! If you’re buying a used vehicle, ask when the automatic transmission fluid was last changed. And as the engine sucked gasoline out of the tank, air would come in through that hole and fill that space that had been occupied by gasoline. I have a 1998 Toyota Tacoma pickup with 210,000 miles. In your case, if it shifts okay, I personally wouldn’t do it, with that kind of mileage. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. Proper checking instructions vary vehicle to vehicle but it's usually imprinted on the transmission fluid dipstick. Toyota recommends changing transmission fluid in their automatics and CVTs at 100,000 miles, while some Jaguar cars are due at 60,000 miles, and Ford heavy duty trucks should be serviced at 150,000. The purpose of ATF is to cool and lubricate your automatic transmission. guides, Check cars for recalls, common issues & maintenance So if you don’t, and you go 198,000 miles and never change it, then a fresh change can sometimes make it slip. The common recommendation from automatic transmission car manufacturers is that you change the transmission fluid at least every 150,000 miles, but preferably after 100,000 miles. I've gotten a few different answers and I want to make sure that I do the best thing to ensure I get the most mileage out of the transmission as possible. I have a 1999 GMC Sierra with 159K miles, and I've been noticing some hard-shifting in 1st/2nd gears as well as some soft shifting or stuttering when in 3rd/4th. Rainfall near a quarter of an inch.. Here is the problem with changing the transmission fluid. The need to change the automatic transmission fluid in your vehicle at intervals is often overlooked, especially in regions like the UK where automatic transmissions are far less prevalent than, say, the US. Why do I see a lot of disclaimers that say "not recommended" or "don't do" a transmission fluid change and/or flush on high-mileage vehicles or ones that have not been serviced? These noises could foreshadow a more serious problem.Try to keep towing heavy loads, like trailers, to a minimum. In most cars, you can check the transmission fluid by finding the transmission dipstick under the hood of your car while the engine is running. If you hear any bangs or groans coming from your transmission, get it checked out by a mechanic as soon as possible. I get different answers at the dealer. I know there is a school of thought out there that transmission fluid should never be changed or changed very infrequently. We would both like to change out and possibly flush the ATF but we've both heard stories about ATF changes being dangerous on high-mileage vehicles that haven't had an ATF change in a while. I bought the truck with 160k on the odometer and have no record of transmission fluid being replaced so I must assume it has not. The manufacturer’s maintenance schedule for many automatic transmissions doesn’t call for fresh fluid until 100,000 miles or, with some Ford transmissions, even 150,000 miles. © Made with ♥ in Silicon Valley. Yes—if the trans, cooler, and converter are completely flushed. 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