Did anyone notice the low speed the jerkiness and knocking sound of the transmission
09-10-2014, 11:06 PM
#41
In reading this I cannot comment on the sound being described. However, I feel that some of what I see being described may be drivetrain 'lash' where the engine/transmission moves on the rubber mounts or subframe. This effect would be greatest in low gears where torque multiplication is the highest.
In the end, it's an automated manual transmission. When the clutch bites, I don't see how you cannot expect to 'feel' something. I would imagine that any software update would slow the shifting down, I'd be careful what you wish for.
Edited to add to the OP:
Are you describing the rev matching feature? As you slow, the transmission should be moving into a lower gear, to smooth out shifts, the throttle should 'blip' a bit to match the revs. It's what I (a manual driver) do when coming to a stop.
In the end, it's an automated manual transmission. When the clutch bites, I don't see how you cannot expect to 'feel' something. I would imagine that any software update would slow the shifting down, I'd be careful what you wish for.
Edited to add to the OP:
Are you describing the rev matching feature? As you slow, the transmission should be moving into a lower gear, to smooth out shifts, the throttle should 'blip' a bit to match the revs. It's what I (a manual driver) do when coming to a stop.
09-11-2014, 04:18 PM
#42
Volvo Defector
I test drove the i4 Tech & V6 Tech last weekend back to back. I also experienced jerkiness coming from the i4. Specifically in traffic. I test drove it during rush hour 5-6PM on route 18 in East Brunswick NJ. While it wasn't bumper to bumper traffic, the volume made me inhibit low speed acceleration + stopping where during a 20 minute test drive I felt the jerkiness 2 or 3 times. It was only during low speeds lightly accelerating or coming to a slow stop. I found it to be alarming considering all the reviews I saw this was the whole point of the torque converter to smooth out the DCT. This was a turn off for me to get the i4.
Driving the V6 afterwards was smooth as butter. I drove the V6 the same exact route as the i4. Acceleration & braking were smooth and I didnt experience any jerkiness.
I was excited to get the i4 Tech but what I experienced is making me think twice. To get the V6 Tech it's another $4000. Was hoping to stay around $35-36k.
Honestly, the issue reminds me of the same jerkiness the 3G TL had with 3rd gear shifting, specifically slowing to a stop at slower speeds and accelerating again with the lurching a lot of people experienced with those transmissions.
Driving the V6 afterwards was smooth as butter. I drove the V6 the same exact route as the i4. Acceleration & braking were smooth and I didnt experience any jerkiness.
I was excited to get the i4 Tech but what I experienced is making me think twice. To get the V6 Tech it's another $4000. Was hoping to stay around $35-36k.
Honestly, the issue reminds me of the same jerkiness the 3G TL had with 3rd gear shifting, specifically slowing to a stop at slower speeds and accelerating again with the lurching a lot of people experienced with those transmissions.
Last edited by reddogTL; 09-11-2014 at 04:25 PM.
09-11-2014, 07:51 PM
#44
For what its worth, I test drove the I4 today and didn't feel the jerkiness that has been reported...
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Stew4HD (09-12-2014)
09-11-2014, 08:19 PM
#45
Advanced
It has been my experience with all of the latest Honda/Acura transmissions that they do indeed drop to lower gears and employ engine braking to help bring the car to a stop.
What does that feel like?
Many times it feels like the car jerks as it goes to a lower gear. It feels like the constant brake pressure you've applied is now actually too much. It feels like what a manual transmission car would feel like, except you don't know when the car is going to drop a gear and you are not prepared for it, as opposed to a manual where you do the shifting and therefore you're prepared for the effects of the change in gearing.
I'm not saying that nothing's wrong but *I* would chalk this up to transmission programming.
Frankly, I've many times looked at the MID and wished that I could know at all times what gear the trans is in, not just when I manually row the cogs.
Last edited by Gregg; 09-11-2014 at 08:21 PM.
09-11-2014, 08:46 PM
#46
Instructor
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internalaudit (09-15-2014),
Stew4HD (09-12-2014)
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BookemDanole (09-12-2014)
09-12-2014, 05:21 AM
#49
Moderator
So what you're saying is that when you are on the brakes, slowing to a complete stop, that you'd like the transmission to simply go into neutral instead of doing engine braking.
It has been my experience with all of the latest Honda/Acura transmissions that they do indeed drop to lower gears and employ engine braking to help bring the car to a stop.
What does that feel like?
Many times it feels like the car jerks as it goes to a lower gear. It feels like the constant brake pressure you've applied is now actually too much. It feels like what a manual transmission car would feel like, except you don't know when the car is going to drop a gear and you are not prepared for it, as opposed to a manual where you do the shifting and therefore you're prepared for the effects of the change in gearing.
I'm not saying that nothing's wrong but *I* would chalk this up to transmission programming.
Frankly, I've many times looked at the MID and wished that I could know at all times what gear the trans is in, not just when I manually row the cogs.
It has been my experience with all of the latest Honda/Acura transmissions that they do indeed drop to lower gears and employ engine braking to help bring the car to a stop.
What does that feel like?
Many times it feels like the car jerks as it goes to a lower gear. It feels like the constant brake pressure you've applied is now actually too much. It feels like what a manual transmission car would feel like, except you don't know when the car is going to drop a gear and you are not prepared for it, as opposed to a manual where you do the shifting and therefore you're prepared for the effects of the change in gearing.
I'm not saying that nothing's wrong but *I* would chalk this up to transmission programming.
Frankly, I've many times looked at the MID and wished that I could know at all times what gear the trans is in, not just when I manually row the cogs.
I too would like to be able to see what gear I'm in without having to hit a paddle shifter - they could have easily included this information along with the other information on the trip computer.
09-12-2014, 07:37 AM
#50
Moderator
Mine is silky smooth while I'm slowing down - it only jerks a tad when I nudge the gas again - almost like it picked the wrong gear. This leads me to think it's a software thing and could very well be the nature of the car. It's not like it's a constant jerking - it's just one little tug when it shifts. At this point for me it's a non issue and not something I plan on taking to the dealership.
I too would like to be able to see what gear I'm in without having to hit a paddle shifter - they could have easily included this information along with the other information on the trip computer.
I too would like to be able to see what gear I'm in without having to hit a paddle shifter - they could have easily included this information along with the other information on the trip computer.
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Toddo627 (09-12-2014)
09-12-2014, 01:30 PM
#52
Exactly! Also, depending on your driving style...some "problems" may become more noticeable. After almost a week with the car, I've gotten used to how it behaves and have adjusted my driving a bit to accommodate for the 8 gears...and haven't felt the low-speed shifts nearly as much as I first did. I think most people reporting the issue are coming from 5-6 gears (I had a 5 gear TSX, now 8 with TLX). A 8/9 gear car is not going to behave exactly the same...it takes a little getting used to.
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weather (09-12-2014)
09-12-2014, 01:37 PM
#53
Moderator
Exactly! Also, depending on your driving style...some "problems" may become more noticeable. After almost a week with the car, I've gotten used to how it behaves and have adjusted my driving a bit to accommodate for the 8 gears...and haven't felt the low-speed shifts nearly as much as I first did. I think most people reporting the issue are coming from 5-6 gears (I had a 5 gear TSX, now 8 with TLX). A 8/9 gear car is not going to behave exactly the same...it takes a little getting used to.
That said - I'm going to try playing around with the paddle shifters to see if I can force the transmission into the "right" gear depending on my intentions.
Last edited by CheeseyPoofs McNut; 09-12-2014 at 01:46 PM.
09-12-2014, 02:23 PM
#54
yea I've used the paddle shifters a couple times so far and noticed you need to downshift a few (2-3) gears most of the time to get it to move quickly...gotta get used to that. On my TSX it only needed 1 to 2 clicks down to get into 3rd...and gooooo!
09-12-2014, 03:21 PM
#55
I found a really informative video on the basics of dual clutch transmission. It appears that this was made without his knowledge of the Acura DCT with torque converter. However, from his descriptions you could easily see where the torque converter comes into play.
It's about eight minutes long so those with a short attention span may not make it through the whole thing. But I think that every sales consultant here at our store could benefit from understanding the mechanics he explains. If only we could get them to watch it.
It's about eight minutes long so those with a short attention span may not make it through the whole thing. But I think that every sales consultant here at our store could benefit from understanding the mechanics he explains. If only we could get them to watch it.
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CheeseyPoofs McNut (09-13-2014)
09-13-2014, 10:42 PM
#57
Moderator
Spent the day (about 100 miles) in econ mode and didn't notice anything at all - I think it's all software related specific to the mode you're in. I really love how smooth this thing is on the highway!
09-13-2014, 11:26 PM
#59
09-14-2014, 11:48 PM
#60
09-16-2014, 12:27 PM
#61
My V6 Tech TLX has similar issues when slowing down but I'm not that concerned with the downshifting. My problem is that when shifting to 5th gear it slips then catches 5th gear so there is a noticeable jerk to the car. It only happens when the car is cold but that is the case when I leave, go to lunch and go home. Dropped it off at the dealership today and they said either its the computer or replace the whole transmission. We'll see but I'm not happy about dropping off my TLX after 2 weeks of owning it.
09-16-2014, 12:47 PM
#62
My V6 Tech TLX has similar issues when slowing down but I'm not that concerned with the downshifting. My problem is that when shifting to 5th gear it slips then catches 5th gear so there is a noticeable jerk to the car. It only happens when the car is cold but that is the case when I leave, go to lunch and go home. Dropped it off at the dealership today and they said either its the computer or replace the whole transmission. We'll see but I'm not happy about dropping off my TLX after 2 weeks of owning it.
09-16-2014, 10:49 PM
#63
I got a call from the service dept at the dealership this evening. They apologized repeatedly and said a new transmission is being shipped from Acura and mine is getting replaced! I was shocked but the manager said Acura isn't interested in repairing the transmission, they just want to put in a new one. Still sucks but what service!
09-16-2014, 10:52 PM
#64
^^ Dealers almost never open a transmission case anymore. On something this new, they need to get it back to the factory to tear it down to find the problem.
09-17-2014, 09:36 AM
#65
I got a call from the service dept at the dealership this evening. They apologized repeatedly and said a new transmission is being shipped from Acura and mine is getting replaced! I was shocked but the manager said Acura isn't interested in repairing the transmission, they just want to put in a new one. Still sucks but what service!
Good news. Let us know how the new tranny feels!
09-17-2014, 10:21 AM
#66
Instructor
I would be furious if i bought a new car and the tranny had to be replaced after 2 weeks..
my i4 tech has low speed jerkiness as well. noting jarring but its noticeable.
Gas response is quite minimal with basic gas touch which is not very acura like either
my i4 tech has low speed jerkiness as well. noting jarring but its noticeable.
Gas response is quite minimal with basic gas touch which is not very acura like either
09-17-2014, 11:05 AM
#67
09-17-2014, 10:05 PM
#68
I told them my frustration with this whole issue and how my new car is sitting in a repair parking lot. They offered 1st and 2nd standard service which is total ~$300 value. Also the transmission is on order and will be here and installed Friday. In a loaner RDX til then. Should I ask for more??
09-17-2014, 10:09 PM
#69
I told them my frustration with this whole issue and how my new car is sitting in a repair parking lot. They offered 1st and 2nd standard service which is total ~$300 value. Also the transmission is on order and will be here and installed Friday. In a loaner RDX til then. Should I ask for more??
09-17-2014, 10:14 PM
#70
Burning Brakes
I told them my frustration with this whole issue and how my new car is sitting in a repair parking lot. They offered 1st and 2nd standard service which is total ~$300 value. Also the transmission is on order and will be here and installed Friday. In a loaner RDX til then. Should I ask for more??
That seems like a fair offer to me. I understand how frustrating it is for you but it does appear that the dealer is genuinely concerned and trying their best to accommodate you. Best of luck to you though and I really hope they make things right for you.
09-17-2014, 11:42 PM
#71
1st Gear
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I found a really informative video on the basics of dual clutch transmission. It appears that this was made without his knowledge of the Acura DCT with torque converter. However, from his descriptions you could easily see where the torque converter comes into play.
It's about eight minutes long so those with a short attention span may not make it through the whole thing. But I think that every sales consultant here at our store could benefit from understanding the mechanics he explains. If only we could get them to watch it.
How Dual Clutch Transmissions Work - YouTube
It's about eight minutes long so those with a short attention span may not make it through the whole thing. But I think that every sales consultant here at our store could benefit from understanding the mechanics he explains. If only we could get them to watch it.
How Dual Clutch Transmissions Work - YouTube
09-18-2014, 02:24 AM
#72
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Originally Posted by golftro
I told them my frustration with this whole issue and how my new car is sitting in a repair parking lot. They offered 1st and 2nd standard service which is total ~$300 value. Also the transmission is on order and will be here and installed Friday. In a loaner RDX til then. Should I ask for more??
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Wow, can't believe you're already getting a new transmission. What happens if the problem continues? Will Acura buy it back?
Did they reset the ECU first and see if anything changes? Car these day "learn" they way you drive. So if you're smashing on it daily in stop and go traffic, the drive is going to be rough.
09-18-2014, 06:31 AM
#73
Of course it's smooth on the hwy. My 6mt G coupe was smooth on the hwy. But on the streets. My passengers hated it. I on the other hand, didn't even notice the jerkiness of my driving.
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Originally Posted by golftro
I told them my frustration with this whole issue and how my new car is sitting in a repair parking lot. They offered 1st and 2nd standard service which is total ~$300 value. Also the transmission is on order and will be here and installed Friday. In a loaner RDX til then. Should I ask for more??
------
Wow, can't believe you're already getting a new transmission. What happens if the problem continues? Will Acura buy it back?
Did they reset the ECU first and see if anything changes? Car these day "learn" they way you drive. So if you're smashing on it daily in stop and go traffic, the drive is going to be rough.
-------
Originally Posted by golftro
I told them my frustration with this whole issue and how my new car is sitting in a repair parking lot. They offered 1st and 2nd standard service which is total ~$300 value. Also the transmission is on order and will be here and installed Friday. In a loaner RDX til then. Should I ask for more??
------
Wow, can't believe you're already getting a new transmission. What happens if the problem continues? Will Acura buy it back?
Did they reset the ECU first and see if anything changes? Car these day "learn" they way you drive. So if you're smashing on it daily in stop and go traffic, the drive is going to be rough.
As far as the ECU, I'll ask but I baby it in traffic and all other gears were smooth, just shifting up to 5 lagged and then jolted.
09-19-2014, 08:26 AM
#74
Senior Moderator
And this is coming from a guy who put up with 5 Acura automatic trans failures, yet still has the car 14 years and 600k miles later.
09-19-2014, 02:23 PM
#76
GM didn't recall their cars for transmission failures until 13 people died...
Last edited by vbx; 09-19-2014 at 02:25 PM.
09-19-2014, 03:23 PM
#78
09-19-2014, 03:27 PM
#79
Suzuka Master
And in the death
As the last few corpses lay rotting on the slimy thoroughfare
The shutters lifted in inches in Temperance Building
High on Poacher's Hill
And red mutant eyes gaze down on Hunger City
No more big wheels
Fleas the size of rats sucked on rats the size of cats
And ten thousand peoploids split into small tribes
Coveting the highest of the sterile skyscrapers
Like packs of dogs assaulting the glass fronts of Love-Me Avenue
Ripping and rewrapping mink and shiny silver fox, now legwarmers
Family badge of sapphire and cracked emerald
Any day now
The Year of the Diamond Dogs
09-19-2014, 05:14 PM
#80
I learned in class today that the sun is going to fizzle out - in about 3 billion years. Before that happens, it will be so hot on earth that everything will burn up. Even with advances in science, I doubt that I will be alive then, so I am not worrying about it.