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Nissan Altima CVT

84 messages,  Last post on Nov 20, 2009 at 11:10 PM

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#1 of 84 07 Altima CVT Transmission by kal1212 Nov 12, 2007 (1:58 pm)
Here's the problem. When moving from a stand-still in slow moving traffic, after reaching about 20mph and coming off the gas pedal, the rpm suddenly drops then shoots back up causing the car to shoot forward. Sometimes I jam on the brakes because it feels like I'm going to hit the car infront of me. Also, when going slowly uphill, the rpm goes down too low causing the car to feel like it has a manaul transmission and is about to stall. Of course this doesn't happen when you take it to the dealer. Anyone else having a similar problem? Again, I only feel these things in traffic. Replies to this message: ripper82 (Nov 21, 2007 4:34 am) jd10013 (Nov 21, 2007 4:53 pm) ripper82 (Nov 23, 2007 10:07 am) and 1 more... dtownmil (Dec 28, 2007 11:40 am)
#2 of 84 07 Altima CVT Transmission by kushlik Nov 14, 2007 (4:06 pm)
I experience a similar problem on 07 altima 2.5S: When you go above 20mpg, when you release gas pedal, everything goes smooth, and the car starts slowing down gradually (as expected). However, if i do not accelerate faster than 20 and release the gas pedal, i feel a bump (a slight drop in rpm and then it comes back up) and then, instead of gradually slowing down (as if above 20 mph), the car starts to keep up the speed (which may seem like accelerating). Also, if originally you go above 20 and the car gradually slows down to 20, same effect is observed - a bump and no more slowing down. It is very annoying if you drive in traffic.. I am going to try to test drive another altima and see if it has the same effect and then go to my dealer anyway.. Let me know if you have any updates with your problem..
#3 of 84 Re: 07 Altima CVT Transmission [kal1212] by ripper82 Nov 21, 2007 (4:34 am)
Replying to: kal1212 (Nov 12, 2007 1:58 pm) Hey guys... I am having the *same* problem with my 2007 Sentra with the CVT. It's happening at higher and lower speeds, but you're right, it's very pronounced around 20 to 25mph. But I have another problem that's happening more during braking, so that when the engine gets down around 1,000 rpm and I'm trying to brake smoothly, the car will rev up a couple hundred rpm pulling me forward, then suddenly it will drop down to about 800 rpm and the car pulls back quite a bit. I have to be really careful to let off the brake when this happens so that the car behind me doesn't think I just slammed down on the brakes.   It seems as if the engine doesn't know which pulley ratio to be using right around that 1,000 rpm mark. I'm taking my car to the dealer today to look at this, and I printed out your posts to show them I'm not just imagining this. I'll let you know how it goes. Replies to this message: jd10013 (Nov 21, 2007 4:53 pm) ripper82 (Nov 23, 2007 10:07 am) jd10013 (Nov 23, 2007 3:30 pm)
#4 of 84 Re: 07 Altima CVT Transmission [ripper82] by jd10013 Nov 21, 2007 (4:53 pm)
Replying to: ripper82 (Nov 21, 2007 4:34 am) I think what you guys are describing is normal behavior for the cvt. Its actually trying to put the car in the most fuel efficent gear ratio as possible. As you said, I think it gets confussed at times. but, just put it in manual mode. that will lock it into a particular gear ratio and your problem should go away. Replies to this message: ripper82 (Nov 23, 2007 10:07 am) jd10013 (Nov 23, 2007 3:30 pm)
#5 of 84 Re: 07 Altima CVT Transmission [jd10013] by ripper82 Nov 23, 2007 (10:07 am)
Replying to: jd10013 (Nov 21, 2007 4:53 pm) The technician at my dealer said that he did feel the problem I described, but that all the CVTs do the same thing, and there's nothing they can do. But he also said Nissan might eventually decide to do something about it, because it *is* annoying.   Maybe it's simply a software issue and they might release a fix for it. Replies to this message: jd10013 (Nov 23, 2007 3:30 pm)
#6 of 84 Re: 07 Altima CVT Transmission [ripper82] by jd10013 Nov 23, 2007 (3:30 pm)
Replying to: ripper82 (Nov 23, 2007 10:07 am) Maybe it's simply a software issue and they might release a fix for it.   Thats exactly what it is. the manual says the CVT is pre-programed with about 300 algorithms that control how it shifts.
#7 of 84 Re: 07 Altima CVT Transmission [kal1212] by dtownmil Dec 28, 2007 (11:40 am)
Replying to: kal1212 (Nov 12, 2007 1:58 pm) I drove a rental 07 Altima 2.5 with the CVT and did not notice this problem. I later had a Dodge Caliber with a "CVT" and it DID have this problem.
#8 of 84 07 Altima CVT 1500 rpm rumble by bambio23 Jan 05, 2008 (5:18 am)
I have a 2007 Altima CVT and when the revs get to around 1500 rpm there is a rumble that can be heard and a vibration is set up that my passengers also note. I have taken it to the dealer and we took out another new car, and it had a similar vibration, even though it was a bit less.   Does anyone else have this problem. Has anyone heard of a fix? Replies to this message: ksthiebaud (Jan 07, 2008 8:51 am)
#9 of 84 Re: 07 Altima CVT 1500 rpm rumble [bambio23] by ksthiebaud Jan 07, 2008 (8:51 am)
Replying to: bambio23 (Jan 05, 2008 5:18 am) Is this the 2.5 or 3.5 engine?
#10 of 84 Rumble by bambio23 Jan 08, 2008 (7:55 pm)
It's a 2.5 engine. Replies to this message: stephaniemott (Jan 20, 2008 12:19 pm)

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