I have been watching a bunch of videos on different transmission designs recently, and I am stuck on a seemingly straightforward question. Manual transmissions and automatic transmissions are designed very differently, with the latter using planetary gears and torque converter. My question is: why did automatics switch to this completely different gearing mechanism, vs. just automating the shifts in a manual transmission?
I am aware that clutchless and automated manual transmissions exist, but I am not aware of why the conventional automatic transmission design was adopted instead of them. Is this purely historical? (If so, what happened?) If not, what engineering advantages does a conventional automatic offer over an automated manual transmission? (The wikipedia page on automatic and automated manual transmissions did not give me a clear answer.)
I’ve been driving automatic my whole life and am very new to learning about manual cars. I saw a car that was said to have an automatic transmission (BMW M4 competition). However, it also has shift paddles. What exactly do these shift paddles do? I assume that it’s for shifting gears but if so, why is this car not considered a manual?
I have an AUDI A7 3.0TDI biTurbo, diesel type, with normal 8 speed automatic transmission box, 4WD, now it is around 90000km, 6 years old. I bought it when it had 70000km.
Recently I had a service at a AUDI service center, including changing engine oil, engine oil filter and the aircondition filter.
I checked the user service book and found that the Haldex-clutch oil needs to be replaced every 3 years for all AUDI cars. But in the sevice book there is no service record of the Haldex-clutch oil since the car is manufactured... The former owner did not do it either within the first 70000km/4 years.
My understanding is that a 4WD car must have the four-wheel-drive system which needs the oil and oil needs to be replaced.
In addition, the service chief said this car has the normal 8 speed automatic transmission box which is a long-life type so no need to change the gear box oil---To be honest, I can't believe that an automatic transmission box does not need oil change...
Do you believe that?
Im sure that the new automatics are better then the manuals like the 2018 mustang one but what about like 2005 or 2010 or even 2015 are the autos better in those?
I understand that it's necessary for manual transmission, since you need to go to neutral every time before switching gears.
In an automatic transmission, it switches for you, so you stay in drive the entire time. Of course, when you want to go in reverse, you stop the car, and switch to that.
Given that, exactly why would you ever need neutral?
I had the thought recently of a sequential automatic transmission, but where pulling the steering-wheel paddles electrically disconnects a clutch until you let go.
So, for example, to downshift, you might pull the paddle and hold it while rev-matching with the throttle, then release the paddle to engage the clutch (and the lower gear). It would end up feeling a lot like driving a motorcycle, as I'm imagining it.
Has this kind of transmission ever been built? I'm curious to find out. I'm not having much luck on google.
I have no experience driving a manual car, and while I wouldn't mind learning to drive one, I'm not quite sure it would be the best move considering I'm looking to buy a car in the 15k$ range and that I really don't want to regret my decision.
I've heard a lot of good things about the Accord V6, but most of my friends suggest me to go manual considering the main pros of that car are the transmission and power. If I choose automatic, would that car still be worth it for the price tag? Would it be "fun" to drive regardless?
The reason why I'm looking for the Accord V6 : It's classy and not too flashy, fast, midsized, I love coupes, it's great for road trips, it's extremely reliable and I just love the sound of V6s. My new job will be in the mining industry, meaning I will work remotely 2 weeks per month where I won't have to daily commute. I also live a fairly rural region, so even though I'm planning to visit cities and do road trips, most of the time, I won't be stuck in traffic.
So yeah, what are you thoughts on the automatic V6?
I'm seeing all these videos on youtube where people are making functioning automatic transmissions and Im wondering why, at least through the googling I did, I can't find any multispeed autos for the 1/10th scale. Is there something holding manufacturers back? Or am I just dumb and needed to look harder?
I would love to hear folks' thoughts/experiences related to the reliability of the the 2013-14 Outback 3.6R Limited, with the automatic transmission, vs. a 2016 3.6R Limited, which has a CVT.
Would love advice - would you purchase/recommend:
Is the CVT / automatic transmission a distinction to dwell on or less of a consideration than some of these other factors like mileage? Any/all thoughts & advice welcome!
My 2011 BMW 328i has been a bit rough as of recent, my car has 104k miles on it, and I bought it 6k miles ago. Would it be worthwhile for me to change my transmission fluid? I heard if I do that I should only drain half of the fluid and put the another half in with new stuff.
Yes, you should always pull over when conditions deteriorate. However, weather apps and reports aren't perfect.
Before I get a "read your truck manual" I'm asking about generally how do and when do you use these functions.
I just got a 4x4 SUV (2010 Lexus GX460) from just using a normal FWD car, so my knowledge on anything with an automatic transmission and shifting is just Park/Neutral/Reverse/Drive.
What specifically is 4L and 4H used for, can you just switch those on with the car moving? There's a picture of a stick figure car with an x in the middle which im assuming is a lock differential, do you have to be parked before you engage any of those? Also there's an ability on the shifter to go from Drive to some S +/-, does that make your car faster or responsive or something like a higher gear in a manual transmission? Does that mean you can just shift to S +/- while I'm driving on the highway?
im not really sure but I'm assuming this theory would work?
Hey guys, just wanted to see if anyone did an automatic transmission tune here. I know automatics aren’t very popular here but maybe someone could tell me if a transmission tune makes more sense than an engine tune.
I have some bolt one but it’s NA. I was hoping to tune my automatic to hold gears for longer, closer to like 6k on every gear or whatever the optimal shift time is for each gear for most performance. Correct me if I’m wrong but 350z automatic transmission from factory comes with most fuel economy shifts so my understanding was that a tune can make the transmission hold gears for longer to get more performance.
I have a 2009 forester and it's starting to slow up a little at 97k miles, I find when changing gears they jump around a little, and sometimes if push the car on a hill it can be pretty sluggish. Was talking to mechanic and just by looking at my past service records he wants to do a whole bunch of things such as change the automatic transmission fluid, transfer case fluid, rear diff fluid, brake fluid flush, pcv valve, fuel system flush. From my limited knowledge, a lot of these things do not seem necessary except maybe the pcv valve change. I have particular concern over the automatic transmission fluid since I have read some things saying that it can actually damage the transmission. Was curious on thoughts about this since there seems to be a lot of opinions, mostly that an older car gets used to the dirty fluid and a change can damage if not break the transmission.
He also wanted to do the timing belt which needs to be done but I was hoping to wait for another 5k or so.