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10-04-2012, 11:12 AM | #26 | |
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Quote:
I was unaware Subaru's Lineartronic was having reliability issues. Could you elaborate?
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10-04-2012, 11:40 AM | #27 |
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10-04-2012, 11:59 AM | #28 |
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10-04-2012, 04:03 PM | #29 | |
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That statement is fine with me, but that also goes for his statement. I have not heard of any reliability issues with them. We have several customers well into the xxx,000 mile ranges with zero problems. Was just wanting him to clarify his statement when it comes to Subaru's CVT. |
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10-04-2012, 09:50 PM | #30 | |
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Ford was an early(ish) adopter of CVTs but they've dropped the use of them entirely. Their PowerShift DCT transmissions offer better gas mileage than a CVT would. CVTs have the benefit of wider ratios, but they do not lock up anywhere near as tight as a DCT or modern auto. They are quite a bit more lossy than you'd expect. Most manufacturers are going with modern automatics or DCTs over CVTs. |
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10-05-2012, 02:32 AM | #31 | |
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Aren't pretty much all hybrids CVT? Including Fords? Also, I believe the new Accord has gone CVT. Audi's? I am sure I am missing some "modern" ones. Oh wait, Nissan is pretty much all CVT. Heck, the next Pathfinder is CVT. |
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10-05-2012, 02:35 AM | #32 | |
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You didn't say that initially. Since the Impreza went to CVT and gets 30% better mpg than before, it made your statement a bit off... |
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10-05-2012, 09:24 AM | #33 |
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Their current 6 speeds hunt around enough already. I can only imagine what a 9 or 10 speed would be like.
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10-05-2012, 10:43 AM | #34 |
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^^^^ A CVT lol
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10-05-2012, 02:17 PM | #35 |
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10-05-2012, 09:33 PM | #36 |
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Yeah, one of our Nissan guys was telling me it is a new type CVT. I am sorry I can't remember how he described it. I was busy that day and my mind wasn't on it.
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10-06-2012, 01:09 AM | #37 | |
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Ford ditched their CVTs due to durability problems. Audi ditched their CVTs due to durability problems. MINI ditched their CVTs due to durability problems. Nissan (the biggest supporter of the tech) extended the warranties (10 year 120k) of eight models over a span of seven years due to a huge number of failures. Honda going CVT isn't a surprise because they've never managed to make an automatic worth a damn. Nobody makes transmissions as horrible as the 4EAT anymore. If you're comparing a NEW Impreza with other NEW cars, you'd be comparing the CVT to modern automatics (like Hyundai's 6AT or Ford's PS). |
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10-06-2012, 06:57 AM | #38 | |
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http://eahart.com/prius/psd/ That is how it works. Pretty robust solution. The volt is similar. The licensed hybrids are all similar as well. So are most of the others that use some sort of planetary gear set. These are used in buses with no problem. Plenty robust. |
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10-07-2012, 09:58 AM | #39 |
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The only experiences I've had with cvt's are an early outback and a murano. The outback felt like I left the hand brake on. The murano was better. Its my mother in laws car. Its done around 110,000 miles and has never had a transmission issue. I believe it tows a small trailer every once in a while. It drives like a normal automatic in regular every day commuter style but if you romp on it it goes up to about 6000rpm and just sits there making noise. It progresses OK but I find myself constantly checking the speedometer as there is zero feedback.
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10-08-2012, 09:04 AM | #40 | |
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Also Ford's PowerShift is terrible when it can "learn" its way into hard shifts and bucking behavior. Then you need to go to the Ford dealership, get it reset, cross your fingers, and drive away hoping it won't screw up again. Then 5000 miles later you are back at the dealer getting another reset because it's acting like trash again. One of my friends has a new EcoBoost F150 and he is on his third transmission and 5th or 6th reset right now. The dealer is at the point where they have nothing to say except "You are driving it wrong" and they won't work on the truck. The truck is parked while the lawyers work it out. Last edited by ocellaris; 10-08-2012 at 09:11 AM. |
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10-08-2012, 10:23 PM | #41 | |
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Hyundai's problem is they program their transmissions to upshift as soon as it won't stall the engine. If you drive with a heavier foot they perk up a bit. Last edited by BigElm; 10-08-2012 at 11:00 PM. |
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10-08-2012, 10:57 PM | #42 |
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10-08-2012, 11:36 PM | #43 |
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Friend of mine bought an altima in 2007 with a CVT. He had the trans replaced 3 times. Doesn't drive insane or with a jerky right foot. Drove it a few times, only problem I had was the electric brakes which had no feedback and even lightly pressing it pretty much locked the brakes up bad. CVTs will eventually be the future of most ATs once they are able to come up with a solid robust design. Remember fuel injection was outright lousy when it first came out, some weren't even electric. Now you couldn't possibly imagine a car without port fuel injection, with the future being you can't imagine a car without direct fuel injection. That's how progression works, it starts lousy and works its way up till something better comes along.
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10-09-2012, 07:16 AM | #44 | |
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05-13-2016, 09:56 AM | #45 | |
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2017 Chevrolet Camaro ZL1 10-Speed Automatic Transmission
Qwerty
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05-13-2016, 10:02 AM | #46 |
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^^
5th and 6th are lot lower and 10th is About the same as 8th in the eight speed unit. Sorry about the crappy chart I fixed it 2 times then when I post it , it snaps back to that unaligned mess. |
05-13-2016, 10:23 AM | #47 |
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Will make for a good drag car, bur otherwise takes away from the fun. Ratios are so close that you don't need a motor with a flat torque curve, or one that revs to the moon. I found this in the ZF 8-speed that everyone seems to love so much. It's just boring. They also don't snap your head like a single-clutch does - again, these autos and dual-clutches are faster, but not as fun. I'll take the fun.
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05-13-2016, 10:43 AM | #48 |
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even though they are talking about the ZL1, this is for fuel economy on trucks more than anything. And they've had enough time to study some of the mistakes others have done in the past (ZF 9 speed).
GM has always been good at mating slushbox autos to pushrods. |
05-13-2016, 01:32 PM | #49 |
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They brag about the upshift times (impressive), but how are the downshifts? Downshifting has always been poor in automatics.
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05-13-2016, 03:09 PM | #50 |
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...And response time to the driver input. I've found, in older exotic cars with paddle shifters, that while the shift time is quick, there is still the delay from when you tap the paddle, and when it begins to execute the shift. It's pretty annoying, and doesn't seem to be mentioned in a lot of the transmission talk. But while they have all these great specs of how fast the transmission changes gear, they neglect to mention how long it takes the *car* to change gear from when you ask for it.
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