Recent Topics
Echo weed trimmer - carb issue?
by ryan2022
52 minutes 8 seconds ago
Reviving Old Hard Rubber Experiment
by sleddriver
Today at 04:47 PM
Where do pets go?
by Whitewolf
Today at 04:47 PM
Help reading Bosch 3330 date code
by beavis87
Today at 04:11 PM
Castrol magnatec
by ChadW
Today at 04:07 PM
Purolator Red 14612 Weedeater Size 6k miles
by bbhero
Today at 04:05 PM
Purolator Red 14612 Weedeater Size 6k miles
by bbhero
Today at 03:46 PM
2001 Chrysler Concorde selling for cheap.
by chryslerconcorde
Today at 03:24 PM
How to open please?
by dblshock
Today at 03:19 PM
Do Purolator clone filters have tearing issues?
by jongies3
Today at 02:59 PM
BW-44-44 Transfer Case special fluid
by -SyN-
Today at 02:27 PM
mini inspection camera for androi phone
by bmwjohn
Today at 02:15 PM
Newest Members
machfive916, Pollybaby, bigblue9, Kane304, 69er
58266 Registered Users
Who's Online
90 registered (Bandito440, 2009Edge, 2cool, aquariuscsm, AandPDan, 69GTX, 7 invisible), 1681 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58266 Members
66 Forums
250809 Topics
4110611 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 1 of 5 1 2 3 4 5 >
Topic Options
#3425429 - 07/15/14 11:42 AM CVT with shift sensation
wing0 Offline


Registered: 10/08/12
Posts: 190
Loc: Ontario, Canada
http://www.autoblog.com/2014/07/15/nissan-alters-all-cvt-act-less-like-stretched-rubberband/

Many new CVT out there have the shift sensation or shift logic built in to mimic automatics.

I am just wondering, would this generate more wear and tear on the CVT in the long run?

Top
#3425440 - 07/15/14 11:54 AM Re: CVT with shift sensation [Re: wing0]
sasilverbullet Offline


Registered: 08/22/04
Posts: 1071
Loc: San Antonio, Tx
Don't know, but my brand new 2014 Civic seems to have shift points.
_________________________
14 Honda Civic 4dr EX-L - Mobil 1 Ext Perf 0W-20 & M1 Filter
14 Honda Accord 4dr EX-L 4cyl - Mobil 1 Ext Perf 0W-20 & M1 Filter

Top
#3425452 - 07/15/14 12:10 PM Re: CVT with shift sensation [Re: wing0]
4wheeldog Offline


Registered: 04/23/12
Posts: 1451
Loc: East Mountains, NM
If the ECU is smart enough to vary the ratio shift points, it should not cause any odd wear. If it always shifts at the same ratio, I am thinking it will eventually "Notch" the cone.

Top
#3425465 - 07/15/14 12:22 PM Re: CVT with shift sensation [Re: wing0]
Miller88 Offline


Registered: 04/09/08
Posts: 10916
Loc: Onondaga County
I can understand the concept of a CVT.

But doesn't programming in gear ratios kind of defeat the purpose?
_________________________
Originally Posted By: 01rangerxl
A Lada with manually adjusted drum brakes sounds like a fantastic car.

2000 Cherokee / 2011 Focus

Top
#3425477 - 07/15/14 12:31 PM Re: CVT with shift sensation [Re: Miller88]
4wheeldog Offline


Registered: 04/23/12
Posts: 1451
Loc: East Mountains, NM
Originally Posted By: Miller88
I can understand the concept of a CVT.

But doesn't programming in gear ratios kind of defeat the purpose?


People are used to the feeling of torque from flywheel effect when the transmission shifts, so CVTs make it feel like there is less torque, and the "Rubber band effect" is the lack of that kick in the butt. It is a matter of perception, not an actual performance issue.

Top
#3425501 - 07/15/14 01:11 PM Re: CVT with shift sensation [Re: 4wheeldog]
leeharvey418 Offline


Registered: 08/05/11
Posts: 724
Loc: Southeast Michigan
Sooo....

Doesn't that kind of defeat the purpose of a CVT? crazy
_________________________
2010 Mazda3 s Grand Touring
2014 Mazda CX-9 Touring AWD

Top
#3425507 - 07/15/14 01:16 PM Re: CVT with shift sensation [Re: wing0]
901Memphis Offline


Registered: 08/14/10
Posts: 10805
Loc: Northern Kentucky
We don't need CVTs. 9 speed automatics can handle everything.
_________________________
2002 Buick Century 125k - Built 4T65e(Maxlife) - Syn Frankenbrew + XG 3387A
1998 Nissan Altima 335k - 5MT - M1 HM 5w30/Fram Ultra XG7317+MOS+ATP 205

Top
#3425508 - 07/15/14 01:19 PM Re: CVT with shift sensation [Re: leeharvey418]
d00df00d Offline


Registered: 10/20/05
Posts: 10176
Loc: PA
Originally Posted By: leeharvey418
Sooo....

Doesn't that kind of defeat the purpose of a CVT? crazy

Yes. Completely.

Discrete ratio programming on a CVT is one of the most blindingly stupid features I can think of. It blows my mind that people actually want it.
_________________________
2011 Mazda RX-8 R3
Castrol GTX 5w-20

Top
#3425511 - 07/15/14 01:29 PM Re: CVT with shift sensation [Re: d00df00d]
JHZR2 Offline



Registered: 12/14/02
Posts: 38086
Loc: New Jersey
Originally Posted By: d00df00d
Originally Posted By: leeharvey418
Sooo....

Doesn't that kind of defeat the purpose of a CVT? crazy

Yes. Completely.

Discrete ratio programming on a CVT is one of the most blindingly stupid features I can think of. It blows my mind that people actually want it.


+1

Just plain stupid. For all the comments in the MT threads from the pro-AT folks, then technology moves on and we get this idiocy.

Top
#3425512 - 07/15/14 01:30 PM Re: CVT with shift sensation [Re: wing0]
badtlc Offline


Registered: 06/08/06
Posts: 4933
Loc: KC
shifting CVTs are have more of a slushbox feel than a torque converter based ATX. They are just terrible all around.
_________________________
2007 Ford Escape XLS 2.3L ATX, Trop Artic 5W30, Fram OCOD, 140k+
2015 Chrysler T&C, 45k+

Top
#3425519 - 07/15/14 01:41 PM Re: CVT with shift sensation [Re: badtlc]
d00df00d Offline


Registered: 10/20/05
Posts: 10176
Loc: PA
When you buy an automatic transmission and demand shift shock, you're saying you don't want to be involved in gear selection, but you do want to be jolted every time it happens.

Think about what that means for a second. All the unsettling feedback, none of the control. It's tantamount to buying a machine the sole purpose of which is to poke you with a stick at random intervals while you're blindfolded.
_________________________
2011 Mazda RX-8 R3
Castrol GTX 5w-20

Top
#3425532 - 07/15/14 02:03 PM Re: CVT with shift sensation [Re: wing0]
IndyIan Offline


Registered: 09/23/08
Posts: 7468
Loc: Ontario, Canada
Maybe they could do the BMW trick of aural engine enhancement, and use the sound system to simulate distinct ratios?
I wonder as well, if there is some wear reduction on some part of the CVT by having many small steps in ratio change vs. a truly continous ratio change?
_________________________
07 Focus ZXW, 5spd manual, 139km VWB 7.5W25
06 CRV, 5 spd auto AWD, 250km M1 EP 5W30

Top
#3425534 - 07/15/14 02:07 PM Re: CVT with shift sensation [Re: wing0]
gregk24 Offline


Registered: 04/13/13
Posts: 4376
Loc: FL, USA
I think it's a neat feature to have for those who like the feeling of shift points. I really could care less either way, as long as it's reliable then that's all that matters, CVTs are not performance transmissions to begin with.
_________________________
2012 Honda Accord EX-L
Taffeta White - Ivory
39,xxx miles

PPPP 0w20 / Fram Ultra

Top
#3425538 - 07/15/14 02:11 PM Re: CVT with shift sensation [Re: wing0]
Hokiefyd Offline


Registered: 06/24/04
Posts: 13737
Loc: Virginia
Presuming that CVT reliability is good, and that they are perhaps lighter with fewer moving parts, etc, I think it's a great feature for those who want the sensation of gear changes. I like to feel the engine rev up through a gear, make a change, and then rev up again. It's part of how I'm programmed I guess.

But I don't feel the need to make those gear changes myself. My wife can't drive one anyway, and has no desire to, so why not give consumers like me a choice in how a CVT drives and feels? The great thing is it's ALL orchestrated with computer programming. You can have it feel like a CVT if you want to. I can have it feel like a traditional automatic if I want to. No change in parts.

More choice, more flexibility, more options...these are always good in my opinion.
_________________________
Cheers,
Jason

2009 Honda Ridgeline RTL
2005 Acura MDX Touring

Top
#3425548 - 07/15/14 02:20 PM Re: CVT with shift sensation [Re: 4wheeldog]
gregk24 Offline


Registered: 04/13/13
Posts: 4376
Loc: FL, USA
Originally Posted By: 4wheeldog
Originally Posted By: Miller88
I can understand the concept of a CVT.

But doesn't programming in gear ratios kind of defeat the purpose?


People are used to the feeling of torque from flywheel effect when the transmission shifts, so CVTs make it feel like there is less torque, and the "Rubber band effect" is the lack of that kick in the butt. It is a matter of perception, not an actual performance issue.


What is the flywheel effect?
_________________________
2012 Honda Accord EX-L
Taffeta White - Ivory
39,xxx miles

PPPP 0w20 / Fram Ultra

Top
Page 1 of 5 1 2 3 4 5 >