Like wine i think CVT hates me - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Compass & Patriot Forum > Like wine i think CVT hates me

WJ Shackle Tabs: Tow-Hook Replacements2014 Spartan Locker Special - While Supplies Last! Dana 3FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye Kit

Reply
Unread 03-25-2013, 05:25 PM   #1
Thunderai
Registered User
2013 MK Compass 
 
Join Date: Mar 2013
Location: Watertown, Sd
Posts: 4
Like wine i think CVT hates me

I have a new 2013 jeep compass 2.4l latitude 4x4 with a cvt transmission. I think the transmission hates me. Like many people onlinewho find the cvt differnt to drive i find it odd and perhaps its me, but i think my cvt dislikes to shift when i think it should.

It happily stays at a higher rpm then it should and dislikes to shift up to lower the rpm. If i control the shifting i can increase the fuel economy but the fuel economy cvt happily burns 17mpg city wasting rpm.

Is it my jeep cvt being normal or should i be worried?

Thunderai is offline   Reply With Quote Quick reply to this message
Unread 03-25-2013, 05:53 PM   #2
FujativeOCR
Registered User
2011 MK Patriot 
 
Join Date: Aug 2011
Location: Newfoundland, Center of the Universe
Posts: 878
Quote:
Originally Posted by Thunderai
I have a new 2013 jeep compass 2.4l latitude 4x4 with a cvt transmission. I think the transmission hates me. Like many people onlinewho find the cvt differnt to drive i find it odd and perhaps its me, but i think my cvt dislikes to shift when i think it should.

It happily stays at a higher rpm then it should and dislikes to shift up to lower the rpm. If i control the shifting i can increase the fuel economy but the fuel economy cvt happily burns 17mpg city wasting rpm.

Is it my jeep cvt being normal or should i be worried?
The 17 mpg city sounds normal to me. The shifting doesn't, since they don't really shift per say. Mine only drops rpm once, and it varies depending how hard it's being stepped on.
FujativeOCR is offline   Reply With Quote Quick reply to this message
Unread 03-25-2013, 07:52 PM   #3
Thunderai
Registered User
2013 MK Compass 
 
Join Date: Mar 2013
Location: Watertown, Sd
Posts: 4
When i drive you hear the engine rev really high and it stays there for awhile. If i manually shift up i can decrease the rpm, but why do i have to shift it up? It seems to shift really slow. Its totaly possible the cvt is so different.
Thunderai is offline   Reply With Quote Quick reply to this message
Unread 03-25-2013, 09:08 PM   #4
FujativeOCR
Registered User
2011 MK Patriot 
 
Join Date: Aug 2011
Location: Newfoundland, Center of the Universe
Posts: 878
Quote:
Originally Posted by Thunderai
When i drive you hear the engine rev really high and it stays there for awhile. If i manually shift up i can decrease the rpm, but why do i have to shift it up? It seems to shift really slow. Its totaly possible the cvt is so different.
It doesn't shift.
FujativeOCR is offline   Reply With Quote Quick reply to this message
Unread 03-26-2013, 03:37 AM   #5
aroundincircles
Registered User
1989 XJ Cherokee 
 
Join Date: Nov 2011
Location: Tempe, Arizona
Posts: 1,126
There are no gears to shift, and it takes a different driving style. That is why most people don't like the CVT, as you have to almost relearn how to drive a car. Can you provide more details? 2.0. Or 2.4? Fwd, FDI, fdii?
__________________
1989 Cherokee Pioneer
http://goo.gl/h3lf9 youtube channel.
aicoffroad.com
aroundincircles is offline   Reply With Quote Quick reply to this message
Unread 03-26-2013, 06:07 AM   #6
Wmillonig
Registered User
2012 MK Compass 
 
Join Date: May 2012
Location: Arlington, Va
Posts: 45
So, here's an example of the auto stick with a CVT, if you're coming down a hill and want to use a little bit of engine braking to keep your speed rather than brakes, each time you "bump" the stick to the left, you drop a "gear". If you drop to 4 or 5, and want to go back, you have to push and hold momentarily the stick to the right and it'll go back to "D" and behave normally, otherwise it'll stay in the last number selected and the RPM will go up when you accelerate. If you drop a couple of gears and then subsequently come to a complete stop, it'll start in "1" and stay there till you either shift it manually, or bump and hold to get back to "D". This happens to me all the time.
Wmillonig is offline   Reply With Quote Quick reply to this message
Unread 03-27-2013, 04:14 AM   #7
yougotdslapd
Registered User
 
Join Date: Mar 2013
Posts: 2
That sounds a little abnormal to me. My CVT gets me 21 mpg city. Before this I was driving a 6 cylinder Ford explorer. I didn't really change my driving habits. You shouldn't feel the CVT shift gears, but you can watch the tachometer and see the RPM drop when it does. You don't see a drop in RPM? In other words, you stay in gear 1 when its in automatic, or what?
yougotdslapd is offline   Reply With Quote Quick reply to this message
Unread 03-28-2013, 04:40 AM   #8
Wmillonig
Registered User
2012 MK Compass 
 
Join Date: May 2012
Location: Arlington, Va
Posts: 45
not sure if you're asking me or the OP? But no, you don't feel the CVT shift, however if I use the auto shift to lower the number then it starts and stays in "1". At least til I bump and hold it back to D. I've never run it to the redline to see if it does anything else. Engine braking isn't nearly as effective as a conventional tranny, but in the hilly neighborhoods around my home, it keeps me at a proper speed.
Wmillonig is offline   Reply With Quote Quick reply to this message
Unread 03-31-2013, 06:03 PM   #9
WingedScapula
Registered User
2009 MK Compass 
 
Join Date: Oct 2011
Location: Pittsburgh, PA
Posts: 62
Quote:
Originally Posted by Wmillonig View Post
not sure if you're asking me or the OP? But no, you don't feel the CVT shift, however if I use the auto shift to lower the number then it starts and stays in "1".
You've given some excellent advice. I'll just add a few more observations: there is a single "shift" that occurs somewhere in the 10-20 MPH range, depending on how hard you're accelerating (if you're accelerating slowly then it's around 10 MPH). I was under the impression that this is like a true first-gear that hands off to the CVT, but I don't know for certain. There are also some weird things with the electronic shifting. For example, when taking declining hills, sometimes manually placing the vehicle into 6th gear slows the vehicle down, while other times I've found that it causes the vehicle to pick up speed. It probably has to do with the initial speed and the angle of decline, but I haven't done this enough to know exactly what it is yet. It seems counter-intuitive that manually setting into the highest "gear" should cause engine braking, though!

Thunderai, I don't know if this explains your observations, but I've also noticed that sometimes the transmission is a bit touchy and seems to maintain higher RPMs inappropriately. I usually notice this when the engine is cold and is still warming up. I find that if I let up on the accelerator a bit then the RPMs drop down to their normal low range (~2000 for my vehicle, freedom drive 1), and then depressing the accelerator to where I was before doesn't cause the RPMs to raise up much. For some numerical examples, the RPMs might be around 2500 to 2700 RPM, slightly letting up on the accelerator drops it down to 2000, and then returning to where I was before brings it to 2100 RPM. It doesn't happen to me all that often, though.
WingedScapula is offline   Reply With Quote Quick reply to this message
Unread 04-01-2013, 08:00 PM   #10
Dacaur
Registered User
2008 MK Patriot 
 
Join Date: Mar 2003
Location: midvale Utah
Posts: 1,138
Quote:
Originally Posted by WingedScapula View Post
You've given some excellent advice. I'll just add a few more observations: there is a single "shift" that occurs somewhere in the 10-20 MPH range, depending on how hard you're accelerating (if you're accelerating slowly then it's around 10 MPH). I was under the impression that this is like a true first-gear that hands off to the CVT, but I don't know for certain.
Just FYI, the CVT doesnt ever shift. what you percive as a "shift" is actualy just something programed into the trannys programing to make people think its shifting.... Same thing with the autostick, all you are doing is forcing the tranny into a lower or higher "gear", but its not really a gear, its just a different ratio. CVT's dont have gears like a normal auto tranny, inside your CVT you will find, basicaly, two pullys connected by a metal belt. the "gear" ratio is controlled by, basicaly, varying the size of the pullys....

So why the fake shift?
When the first generation of CVT's came out, people wouldnt accept them, they kept bringing them in thinking something was wrong, becuase it was "stuck in gear".... Of course being used to a normal automatic, when you are accelerating and the engine revs high and stays there, it IS stuck in gear, right? But of course, thats normal operating procedure for a CVT....... So by programing in a fake shift at about the point where a "normal" auto does its first to second shift, they have tricked people into accepting it, and saved a whole lot of uneeded "service" calls......

You will notice is you accelerate full throttle, you dont get that "shift", because in reality, it slows things down, so when you are asking the tranny to give you all its got, it forgoes the fake shift and just revs up and goes....
__________________
Dacaur

99 WJ Laredo
2.5" Budget boost, 265/75/16 tires, K&N air filter
www.dacaur.com/jeep.html

Past Jeeps:
1992 YJ 4.0, 5 speed 6", lift 33's
1992 XJ 4.0, auto, 3" lift, 31's
1999 XJ 4.0, auto, 3" lift, 31's
1985 XJ 2.5, 5 speed, no lift, 255/70/15's
---------------
Dacaur is offline   Reply With Quote Quick reply to this message
Unread 04-02-2013, 04:07 AM   #11
Gramps
The Necessary Evil
 
Gramps's Avatar
2007 MK Compass 
 
Join Date: Aug 2006
Location: Madison/Janesville, Wisconsin
Posts: 5,623
Correct, the 'gears don't shift, the are programmed and will vary anywhere between 2.349 - 0.394 depending on the Variator position.Transaxle Ratio - 6.12, This calculates out to 14.37 in low and 2.41 in high.

I have not found out what the electronic settings are for the other four positions of the variator.
__________________
Bob

Artificial intelligence is no substitute for natural stupidity

MK Skid Plate fasteners for sale posts 68 & 69

Also visit me at Photobucket
'06 WK Grand Cherokee Limited Quadra-Drive II, 5.7
'07 MK Compass Limited 4X4, AutoStick
Gramps is offline   Reply With Quote Quick reply to this message
Unread 04-03-2013, 09:13 AM   #12
Thunderai
Registered User
2013 MK Compass 
 
Join Date: Mar 2013
Location: Watertown, Sd
Posts: 4
The compass has a Jatco CVT Transmission and I am getting more used to it, but at the same time I wanted to know more about what I'm feeling and seeing so I mapped the transmission 'gears'. Now before everyone screams there are no gears...I know, but their are ratios I can sort of control with the autostick. The interesting part about this chart is that it points to something I already knew, the vehicle likes 30mph at fifth gear. There is good fuel economy there and although sixth gear has better economy at 40mph, 40mph on a city street is uncommon.

Thunderai is offline   Reply With Quote Quick reply to this message
Unread 04-03-2013, 10:50 AM   #13
FujativeOCR
Registered User
2011 MK Patriot 
 
Join Date: Aug 2011
Location: Newfoundland, Center of the Universe
Posts: 878
Depends on your city. Most streets in Fresno where I live, speed limit is 40-45.
FujativeOCR is offline   Reply With Quote Quick reply to this message
Unread 04-04-2013, 06:17 AM   #14
Gramps
The Necessary Evil
 
Gramps's Avatar
2007 MK Compass 
 
Join Date: Aug 2006
Location: Madison/Janesville, Wisconsin
Posts: 5,623
Nice chart and thanks for doing it. Like FujativeOCR hinted at this can change according to the demand put on the engine with hills and such, i.e. the demand that you put on the engine.
__________________
Bob

Artificial intelligence is no substitute for natural stupidity

MK Skid Plate fasteners for sale posts 68 & 69

Also visit me at Photobucket
'06 WK Grand Cherokee Limited Quadra-Drive II, 5.7
'07 MK Compass Limited 4X4, AutoStick
Gramps is offline   Reply With Quote Quick reply to this message
Unread 04-04-2013, 04:34 PM   #15
Thunderai
Registered User
2013 MK Compass 
 
Join Date: Mar 2013
Location: Watertown, Sd
Posts: 4
For the most part each element was tested in the same route so that should minimize some of the variation. Different routes for different speeds but more or less as close as possible.
Thunderai is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.