Gumout Q&A

click here to participate in the Gumout Q&A

Recent Topics
Air in Tranny
by artbuc
04/19/15 12:05 PM
Shelf life of coolant
by Stewie
04/19/15 12:03 PM
marvel oil vs seafoam in oil
by wantboost
04/19/15 11:39 AM
Which diff fluid will help with whining?
by wantboost
04/19/15 11:38 AM
5w20 but how does that protect in summer months?
by wantboost
04/19/15 11:28 AM
Corolla will now be built in Mexico...
by Benoit
04/19/15 10:53 AM
Bleeding cooling system on classic car
by 007
04/19/15 10:51 AM
1978 K5 Blazer Stumbles Until Warmed Up
by Egg_Head
04/19/15 10:21 AM
2009 V6 camry ATF... mityvac
by bowlofturtle
04/19/15 10:09 AM
Problem with pictures
by whip
04/19/15 09:33 AM
Bridgestone Dueler H/L Alenza Plus - Thoughts?
by 2010_FX4
04/19/15 09:20 AM
New Truck, 2015 Ram 1500
by MuzzleFlash40
04/19/15 09:06 AM
Newest Members
rickeys, DROD, nandowln, Bldavis22, kemtho
53640 Registered Users
Who's Online
88 registered (ag_ghost, 2002 Maxima SE, 2010Civic, aquariuscsm, andyd, barkingspider, 6 invisible), 2170 Guests and 176 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
53640 Members
66 Forums
229985 Topics
3680091 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: 138
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: 939
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: 634
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: 8205
Loc: Onondaga County
I can understand the concept of a CVT.

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

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


Registered: 04/23/12
Posts: 634
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: 705
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: 7334
Loc: Northern Kentucky
We don't need CVTs. 9 speed automatics can handle everything.
_________________________
2002 Buick Century 108k - O'reilly HM 5w30/Fram Ultra XG 3980
Filter mag/Cooper CS5 GT/Wearever Platinum Ceramics
Triple Edge 4T65E/Maxlife Dex-Merc

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


Registered: 10/20/05
Posts: 9618
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: 35428
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: 4369
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, MMO/Trop Artic 5W30, MC Fl910s, 120k+
2012 Mazda 3i Skyactiv M1 AFE 0W20, 6spd MTX Redline MTL, 40k+

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


Registered: 10/20/05
Posts: 9618
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: 6086
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, 111km M1 5W20
03 Tracker, 5spd manual, 282km, Valvoline Syn 5W30

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


Registered: 04/13/13
Posts: 3535
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.
_________________________
2006 Honda Accord 2.4 129K
M1 AFE 0w20
Fram Ultra

2005 Chevy Uplander 3.5 123K
VML SB 5w30
Fram Ultra

1991 Buick Park Avenue 3.8 115K
MSHM SB 10w30
Fram TG

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


Registered: 06/24/04
Posts: 12315
Loc: North Carolina
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

2008 Honda CR-V EX-L (Shell 5W-30)
2005 Acura MDX Touring (VNG 5W-20)

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


Registered: 04/13/13
Posts: 3535
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?
_________________________
2006 Honda Accord 2.4 129K
M1 AFE 0w20
Fram Ultra

2005 Chevy Uplander 3.5 123K
VML SB 5w30
Fram Ultra

1991 Buick Park Avenue 3.8 115K
MSHM SB 10w30
Fram TG

Top
Page 1 of 5 1 2 3 4 5 >