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nadunr Profile
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Date Registered: 05-2014
TOTAL POSTS: 7
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Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


Hi Everyone,
I hope someone could advice me on this, I have a 2012 Nissan X-Trail 2.5 L T31 XTronic CVT model,
I bought it second hand and has had about two months, it has about 49000km on the clock.
I notice that there is a delay in starting the car to move when I shift from one gear to the other, Say if i change from Reverse to Drive, it takes about 1.5 seconds before the car starts to move, i dont notice gear engaging or RPM rise during this time gap either.
So, its only after about 1.5 seconds, the gear engages and RPM rises even if i immediately press the accelerator.
This is on a level ground not up hill or down hill.
This has been the same for the last two months and the time delay hasnt increased, still 1.5 sec.
This personally doesnt really bother me, however when compared to my Toyota Yaris (4spd Auto) I can clealy feel the difference, which in Toyota Yaris's case almost immediate engagement and movement.
Note : This car has 2WD/4WD and Auto modes (which you can select by rotating a knob just infront of gear lever), mine is usually set to 2WD mode. Changing the mode doesnt solve the above problem.
Thanks for any ideas.
4/May/2014, 12:07 am Link to this post Send Email PM   Send Private Message Blog
 
Jupitor 2 Profile
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Date Registered: 01-2009
Location: Newcastle Australia
TOTAL POSTS: 318
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Re:


Yep mine does the exact same thing, both with the old CVT and new one which was replaced under warranty. A bit annoying waiting for it to engage when doing reverse parking and there's people behind you. And if you start accelerating to early there's a real jolt.

---
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Translucidus Profile
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Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
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Re: Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


Absolutely normal for this transmission!

If you move the shifter quickly from D to R (ie immediately after stopping - NOT ramming the shifter) or vice versa then it shifts almost instantly.

If you pause for an instant then it takes a while.

Last edited by Translucidus, 4/May/2014, 8:11 pm


---
2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

4/May/2014, 8:10 pm Link to this post Send Email PM   Send Private Message
 
nadunr Profile
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Date Registered: 05-2014
TOTAL POSTS: 7
Reply | QUOTE
Re: Re:


quote:

Jupitor 2 wrote:

Yep mine does the exact same thing, both with the old CVT and new one which was replaced under warranty. A bit annoying waiting for it to engage when doing reverse parking and there's people behind you. And if you start accelerating to early there's a real jolt.



Hi, Thank You for your advice, can i ask you, why was your CVT replaced? was it because of a similar issue or something else?

I am just worried, that i might end up having to replace my CVT.
At the moment it is still under warranty, however only a few months of warranty remaining..

Thanks

5/May/2014, 7:58 am Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 05-2014
TOTAL POSTS: 7
Reply | QUOTE
Re: Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


quote:

Translucidus wrote:

Absolutely normal for this transmission!

If you move the shifter quickly from D to R (ie immediately after stopping - NOT ramming the shifter) or vice versa then it shifts almost instantly.

If you pause for an instant then it takes a while.



Hi Thanks for the advice. I havent noticed this with any other car with automatic transmission before, I have been driving Toyotas until recently.
Do you think this delay is likely to get worse?

Cheers
5/May/2014, 7:59 am Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
Reply | QUOTE
Re: Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


Regarding the "delay":

My Transmission was replaced at around 30k kms. The new one was very tight and quiet but as it "wore in" it became like the one replaced.

I have now done 100,000kms trouble free and believe both my transmissions were/are fine regarding durability, function and continuing great drivability and performance.

I'm saying this because CVT transmissions are entirely different to any other transmission you may have experienced.

The pulleys/belt drive is immediately after the torque converter and the reversing gear cluster.

There is then a series of reduction gears and the differential before the drive shafts and this, together with the pulsations from the engine (very light flywheel unable to dampen completely), I believe, leads to some "backlash" or perceived looseness in the drive train.

It is all fine though!

The delay in D to R etc I believe, is caused to some extent by the above and to a greater extent by dropped oil feed pressure to the shifting mechanism inside the gear box after vehicle has stopped for more than about 1 second. This is most probably caused by the engine revs dropping to idle and therefore the hydraulic pump slowing to idle. Note that the hydraulic pump that provides pressure to operate the CVT is driven by a sprocket and chain directly from the engine.

The D to R or R to D is instantaneous if the shifter is moved immediately the vehicle has stopped - stop for more than a second and the hydraulic pressure from the transmission oil pump needs to be restored and this takes a moment.

All the above is very stable and not worsening in my T31 and seems completely normal now I am used to it. You can't compare a CVT to a regular automatic that has planetary gears and clutches. They shift faster from D to R but drive nowhere near as smooth as a CVT or have such a wide spread from low to high gearing.

Relax and enjoy your car as it is a very sophisticated piece of machinery and electronics.

---
2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

5/May/2014, 1:39 pm Link to this post Send Email PM   Send Private Message
 
nadunr Profile
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Date Registered: 05-2014
TOTAL POSTS: 7
Reply | QUOTE
Re: Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


quote:

Translucidus wrote:

Regarding the "delay":

My Transmission was replaced at around 30k kms. The new one was very tight and quiet but as it "wore in" it became like the one replaced.

I have now done 100,000kms trouble free and believe both my transmissions were/are fine regarding durability, function and continuing great drivability and performance.

I'm saying this because CVT transmissions are entirely different to any other transmission you may have experienced.

The pulleys/belt drive is immediately after the torque converter and the reversing gear cluster.

There is then a series of reduction gears and the differential before the drive shafts and this, together with the pulsations from the engine (very light flywheel unable to dampen completely), I believe, leads to some "backlash" or perceived looseness in the drive train.

It is all fine though!

The delay in D to R etc I believe, is caused to some extent by the above and to a greater extent by dropped oil feed pressure to the shifting mechanism inside the gear box after vehicle has stopped for more than about 1 second. This is most probably caused by the engine revs dropping to idle and therefore the hydraulic pump slowing to idle. Note that the hydraulic pump that provides pressure to operate the CVT is driven by a sprocket and chain directly from the engine.

The D to R or R to D is instantaneous if the shifter is moved immediately the vehicle has stopped - stop for more than a second and the hydraulic pressure from the transmission oil pump needs to be restored and this takes a moment.

All the above is very stable and not worsening in my T31 and seems completely normal now I am used to it. You can't compare a CVT to a regular automatic that has planetary gears and clutches. They shift faster from D to R but drive nowhere near as smooth as a CVT or have such a wide spread from low to high gearing.

Relax and enjoy your car as it is a very sophisticated piece of machinery and electronics.



Hi Translucidus,

Many thanks for your time and detailed reply, now its very clear to me..
I really appreciate your input..

Cheers
N
6/May/2014, 8:07 pm Link to this post Send Email PM   Send Private Message Blog
 
Jupitor 2 Profile
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Date Registered: 01-2009
Location: Newcastle Australia
TOTAL POSTS: 318
Reply | QUOTE
Re:


Check this thread as to why my CVT was replaced.

http://baustralianxtrail.runboard.com/t127275

---
Diamond White Series 1 T31 CVT Petrol
X-1111 (c)
Bash Plates
Towbar
Rubber Mats
TomTom GPS
Garmin Etrex 10 for Geo-caching
7/May/2014, 10:11 am Link to this post Send Email PM   Send Private Message
 
Jupitor 2 Profile
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Date Registered: 01-2009
Location: Newcastle Australia
TOTAL POSTS: 318
Reply | QUOTE
Re: Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


quote:

Translucidus wrote:

Regarding the "delay":

The delay in D to R etc I believe, is caused to some extent by the above and to a greater extent by dropped oil feed pressure to the shifting mechanism inside the gear box after vehicle has stopped for more than about 1 second. This is most probably caused by the engine revs dropping to idle and therefore the hydraulic pump slowing to idle. Note that the hydraulic pump that provides pressure to operate the CVT is driven by a sprocket and chain directly from the engine.

The D to R or R to D is instantaneous if the shifter is moved immediately the vehicle has stopped - stop for more than a second and the hydraulic pressure from the transmission oil pump needs to be restored and this takes a moment.

All the above is very stable and not worsening in my T31 and seems completely normal now I am used to it. You can't compare a CVT to a regular automatic that has planetary gears and clutches. They shift faster from D to R but drive nowhere near as smooth as a CVT or have such a wide spread from low to high gearing.

Relax and enjoy your car as it is a very sophisticated piece of machinery and electronics.



Well I tried the above method of shifting immediately after the vechile has stopped and found no difference, still a delay between D & R engaging.

---
Diamond White Series 1 T31 CVT Petrol
X-1111 (c)
Bash Plates
Towbar
Rubber Mats
TomTom GPS
Garmin Etrex 10 for Geo-caching
8/May/2014, 9:38 am Link to this post Send Email PM   Send Private Message
 
DogTrail Profile
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Date Registered: 05-2012
Location: Sunshine Coast
TOTAL POSTS: 481
Reply | QUOTE
Re: Time delay of about 1.5 sec before car start moving - from Drive to Reverse gear and vice versa


My 2011 /12 T31 does the same.

Mine takes about the same time as counting 'one thousand and one' for take-up after shifting from neutral. i.e 1 second - but it always seems longer at the time.

Zero elapsed time (except for the gulp of air & fuel) of course if you happen to be in Drive or manual at the time.

That slight delay does seem to be normal for that transmission.

Best way to test is to sit it stationary in neutral on flat ground & without the brake, then drop it into drive without using the accelerator.

You should feel the transmission pick up and engage ('one thousand and one' slowly ~1 second), then it will idle forward for you.

Try that out & see how yours behaves emoticon





Last edited by DogTrail, 9/May/2014, 12:16 am


---
2011/12 Australia:- 2.5 litre petrol 4WD, Series IV ST, CVT : + some gadgets and cosmetic add-on's. Dirt, (it protects the paintwork) X-2429(c).
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