Should automatic transmissions get routine ATF changes? Everyone young and old tells me not to touch the fluid ever.Where does that mindset come from?
>>28637759>Where does that mindset come from?retards who don't know what transmission adaptive tables are.
>>28637759Planned obsolescence. Remember that in strict legal terms if the company says the transmission fluid will last the lifetime of the transmission that means when the trans fails the fluid has lasted the lifetime of the trans and they haven't lied and cannot be sued.
>>28637765>Where does that mindset come from? >retards/thread
>>28637759This meme debate will never be settled. This is what I go by based on my research and experiences. Assuming you're buying the vehicle new and it has a non-"lifetime fluid" tranny you want to change that fluid often and keep it as clean as possible. If you're buying a dilapidated piece of shit and the tranny fluid looks like abused diesel oil then you're better off letting it be. I've changed fluid like that and it shifted fine afterwards so ymmv I guess.
You should not operate an automatic transmission equipped vehicle
>>28637785question. why would changing out bad transmission fluid for new fluid make it operate worse?
i bought a car with a high mileage 4l60e. i replaced the fluid and filter and lost 3rd and 4th gear a few days later
>>28637810Loss of friction material on the discs.Its now floating in the fluid.So they work together.
>>28637814Did you set the ATF level with a warmed up transmission and with it in drive?
>>28637847Yes I set the level according to the manual. it was not low. if it were low the torque converter would have failed to lock up in 4th gear (while it was still able to get to 4th gear)
>>28637810see>>28637765most idiots don't perform the relearn procedure after changing the fluid.
>>28637759ATF fluid should be changed yearly, transmission fluid loses its lubricating properties over time due to heat and contamination. This old fluid burns up the clutch packs, burnt / worn out clutch packs will work with the burnt / grit filled fluid because of the lack of proper lubrication & friction material in the fluid. So if you have a good AT trans change your fluid regularly, if your trans is old neglected & slipping don't change the fluid, its already broken and running on borrowed time.
>>28637775WrongEvery car has an expected mileage which is the lifetime of a car.You can get away with no oil change of the atf but you wont get as far compared to proper maintenance.>for example BMWZF, the AT manufacturer recommends to change the atf every 60 to 80k kmBmw says its lifetime oil because the car is built to last 150k km.The AT will last 150k km but not changing the atf will cause permanent damage to the transmission over the years.
>>28637814From the reading I've done on the subject a lot of people say you just expedited the process. It was going to shit itself regardless.
>>28637819if the only thing keeping your tranny working is clutch material in the fluid, its already completely fucked and wont go another 5k miles
You also need to keep in mind, the fluid change number isn't the same as total capacity. I used to own a BMW E91 with the GM auto, total capacity was 14L but the change amount when you dropped the pan was only 7L.
>>28637759Yes.>>28637814I replaced both (partial drain/fill) in a high mileage 4L60E and nothing bad happened to it since. How exactly did you do your replacement?
>>28638101>It was going to shit itself regardlessYeah but it could've lasted another couple years which is the life of ownership for most people.That's why you don't change it imo.
>>28638354>Yeah but it could've lasted another couple yearsHow can you be so sure?
>>28638095>ZF, the AT manufacturer recommends to change the atf every 60 to 80k km>Bmw says its lifetime oil because the car is built to last 150k km.>The AT will last 150k km but not changing the atf will cause permanent damage to the transmission over the years.i always wondered where this disparity comes from. My owner manual says 20-40k km oil change interval for my 5 speed MANUAL and here you have 60-80k for an automatic
>>28638095ZF also claims the fluid is lifetime and should be changed only under extreme conditions, in which case I believe they updated their recommendation to 150k kms. This entire argument about fluid changes is retarded, might as well change out most other drivetrain components so the car lasts longer, it is proper maintenance after all. The fact of the matter is that when designing and manufacturing anything at all, it makes sense to take into account how long a car is expected to last. Why design a car to last 500k miles when there is a high probability the car will be involved in a crash or at least one of the owners doesn’t do any maintenance? To appease the 1% of people on Papuan banana engravement forums? This discussion is specific to a transmission, in which case the most trustworthy source regarding its fluid change interval is the manufacturer, not some lore from a government hating redneck from Arkansas on the forums named Chuck "Big Boss" Tamzarian.
>>28638360Probably from >more strain on the gearbox requires changing fluid more oftenServicing schedules for some cars often list two intervals, for normal and severe use conditions, guess which ones are shorter.People with tuned engines and shitty auto gearboxes you can't really "build" sometimes do a single ATF drain/fill along with every engine oil change. Idk if that helps, but they do it. The fluid is pretty cheap.
>>28638368>ZF also claims the fluid is lifetime and should be changed only under extreme conditionsZF has never claimed this you absolute retard
Yes, they should. Boomers can't even use a debit card machine and you're going to believe their lore about complex machinery? Changing the fluid can do absolutely nothing except help.
>>28638369>>more strain on the gearbox requires changing fluid more often>Servicing schedules for some cars often list two intervals, for normal and severe use conditions, guess which ones are shorter.Yeah that's my point.We're talking about a 1100kg jap econobox equipped with a pretty archaic 5spd manual and not a lot of horsepower not a xboxhueg german wallahmobile with a 250+ horsepower diesel
>>28638381>manual
>>28637759You should definitely change the trans oil. The transmission will last forever if you change it routinely. That's why they don't want you changing it
Do not listen to idiots. Change your fluids. All of them.
>>28638423Even blood?
>>28638424your spleen does that. the dead blood cells go into your poo, giving it that brown colour
>>28638424Athletics administration boards all over ban blood doping..so yes, full blood exchange for maximum oxygenation.
>>28637759In the vast majority of cases it’s retarded. But it is true that sometimes changing it can kill the transmission. IME if the fluid has any red left in it when looking at the dipstick, you’ll probably be fine to change it. But if it’s just completely black, I’d leave it be.>>28637765Adaptive tables can’t compensate for their not being enough friction material left. Just like a manual clutch.>>28638101This
>>28638424Yes. You will do it naturally over time but you can bloodlet to improve the process.
>>28637759A modern car is only gonna last 80-120k miles. Yes even your precious gay Toyota. So it is lifetime fluid.
>>28637759I've never fucked up a transmission by changing the oil, but I've recovered 3-4 REALLY slipping Hondas by draining + filling + cleaning solenoids (Honda thing) and dumping some Lucas slop into them in the worst case. Note that a drain + fill is different than a flush, and also typically doesn't change all the fluid at once.I've made a high mileage 4L80 that wouldn't engage gears work by changing the diesel-black fluid and filter a few times (few miles in between). I did the same thing to a high mileage 4L60E with a funny clunk, although I also swapped out the filter and solenoids in that case. I dumped some Lubegard slop into the GMs (watery, not like the Lucas snot) as it's supposed to help with shudder, and it did.>but muh bandaid fixes!At least one of those Hondas, the worst slipping one actually, I sold to someone locally and I saw it farting around for the next 3-4 years at least. The GMs I drove for years, I'm still driving one of them in fact.In the case of one of my old Mercedes with an unknown amount of miles (200k+ at least), it had a drain plug on the torque converter and I completely refilled it fresh, also replacing the filter and installing a spring kit (Mercedes thing) to firm up some of the shifts. Runs great.>>28638368Most don't read into it, the "lifetime fluid" is literally referring to the lifetime of the warranty. On the average warranty and maintenance schedule up to 50-75k or even 100k miles it doesn't have to be done, and as they don't care about anything past that it's called "lifetime". ZF themselves call for fluid changes, while brands that use ZF transmissions like BMW and Alfa Romeo don't and will call them lifetime as they're not a regular service.
>>28637759I’m thinking about doing a drain and fill on my car but it’s absolute horseshit that the pan has to be swapped out because the filter is built in
>>28637759Gents, my 6R80 in my mustang has about 110K on it. No idea if its ever been done. Shifts fine, especially when warm. Should I change it?
>>28642740I've never seen a dirty transition filter to be honest.I used to change the filter + fluid every 50K miles.But the filter was always perfect, so I just do fluid.
>>28638356>schrodinger's 4l60ei have a 97 silverado 1500 with a broken tranny also. i knew it was going because it it shifted funny, still lasted me a year and being stupid and doing pulls with it. dont wanna get rid of it because the previous owner(white dude) lowered it and put a hard bed cover snug top. just have it parked atm. ill fix it eventually look like pic related
>>28637775think of it not as the lifetime of the transmission but the lifetime of the warranty
>>28638424bleeding/leeches is literally one of the only ways to remove insoluble pollutants that can't pass through the kidneys (eg particulates)>>28638101>>28639611people don't understand the reason for why changing completely shot trans fluid appears to result in loss of shifting; it's because the transmission itself is already completely shot and all the worn off material floating in the scum soup is providing extra frictionthere is in other words really no good reason to not change it anyways, and add a friction modifier if necessary, and also just do it regularly in the first place and you won't have these problems, transmissions are expensive and fluid is cheap
>>28638370i read your post and the one you replied to and you sound a lot stupider than him fyi.
