[dual-clutch]

With the DCT does anyone manually downshift to coast to a stop from about 50-60 mph? What gear do you drop into?

It just seems to take a lot longer than usual to coast to a stop with this car on the automatic side.

 

[anonimaus]

I’m automatic mode, it does keep the rpm’s so low it’s almost lugging the engine IMO unless you apply brakes. I always tend to downshift as I’m used to the engine braking of a manual, keeping it in the 3K ish rev range.

 

[dual-clutch]

What's the best way to manually downshift in a DCT?

 

[ForteGT2]

The real question is why? Why do you need to downshift to a stop? In smart or normal mode the ECM and TCM are working together to maximize MPG. If you want downshift "stopping" power then put it in Sport mode and you'll get a little more braking...but again...I don't see the point?!?! Why do you want to increase wear on the tranny?

 

[dual-clutch]

The real question is why? Why do you need to downshift to a stop? In smart or normal mode the ECM and TCM are working together to maximize MPG. If you want downshift "stopping" power then put it in Sport mode and you'll get a little more braking...but again...I don't see the point?!?! Why do you want to increase wear on the tranny?

Hmmm all good questions.

 

[noturbonoproblem]

What's the best way to manually downshift in a DCT?

Just start grabbing the downshift paddle? It'll return to drive automatically afterward.

 

[noturbonoproblem]

The real question is why? Why do you need to downshift to a stop? In smart or normal mode the ECM and TCM are working together to maximize MPG. If you want downshift "stopping" power then put it in Sport mode and you'll get a little more braking...but again...I don't see the point?!?! Why do you want to increase wear on the tranny?

Transmission is under warranty, brakes are not. LOL
It won't put any significant wear on the trans since everything is rev matched. Pulling away from a stop or creeping will do much more in terms of wear

 

[dual-clutch]

Just start grabbing the downshift paddle? It'll return to drive automatically afterward.

Sounds easy enough.

 

[ForteGT2]

Transmission is under warranty, brakes are not. LOL
It won't put any significant wear on the trans since everything is rev matched. Pulling away from a stop or creeping will do much more in terms of wear

Brakes are CHEAP compared to tranny rebuilds. I can replace brakes...and I don't want the average "mechanic" doing major work on MY car...LOL!

 

[dual-clutch]

I guess the other question I have is if I'm planning to keep this car for the long haul (115k+) is it better to have the transmission replaced at least once while it's under warranty?

 

[noturbonoproblem]

Brakes are CHEAP compared to tranny rebuilds. I can replace brakes...and I don't want the average "mechanic" doing major work on MY car...LOL!

Agreed - that was satire. If you're the type of person to only keep a car for like 6 years though, it does beg the question...

I guess the other question I have is if I'm planning to keep this car for the long haul (115k+) is it better to have the transmission replaced at least once while it's under warranty?

These things are quite overbuilt. With your luck, you'd probably end up grenading it at 100,001 miles. Drive it how you want, and don't worry too much about it and you'll be fine. Rule of thumb - just keep clutch slip to a minimum for long transmission life.

 

[dual-clutch]

Agreed - that was satire. If you're the type of person to only keep a car for like 6 years though, it does beg the question...

These things are quite overbuilt. With your luck, you'd probably end up grenading it at 100,001 miles. Drive it how you want, and don't worry too much about it and you'll be fine. Rule of thumb - just keep clutch slip to a minimum for long transmission life.

I'm pretty good about not slipping the clutch. Accidently shifting into second gear when going 50+...eh not so much. But it only happened ONCE.

 

[aetb]

I'm pretty good about not slipping the clutch. Accidently shifting into second gear when going 50+...eh not so much. But it only happened ONCE.

The ecu/tcu won't allow you to downshift at a speed/rpm that would cause damage to the engine or gearbox. You can try to downshift at 6,000rpm and nothing will happen - or at least that's how the AU-delivered GT has been set up.. It's also why the DCT will automatically upshift at/near redline even when in manual mode - which is something I really dislike but it's done to reduce wear and fatigue on both the transmission and the engine (valvetrains don't tend to like bouncing off the rev limiter)

Also, if you do use the paddles to downshift or upshift while it's in auto mode, and you want to return it to auto mode, just pull-and-hold the upshift paddle for about 2-3 seconds and it'll revert immediately (otherwise it'll hang in temporary-manual-mode for a while)

 

[Steve g]

If I try to downshift from 50mph the rpms will go through the roof.. and still be doing 40mph.. these little motors don’t have the engine braking power of a high compression v8 or diesel

 

[PLP]

Question what Gear you are in is irrelevant. It is about RPM.
The point behind coast is to maximize fuel economy (minimize fuel consumption).
Hence, the tranny will keep the gear until very low rpm to allow for least engine speed, but high enough to enable fuel cut off.

One thing to consider, not sure how it works with DCT, but most automatics would disable the fuel cut off the moment you start shifting manually. After a while, if you stay in gear, it will enable it back again. That might be causing you to coast further than without any intervention.

As for the gear - it is hard to suggest. It all depends on the conditions, load, wind, distance, speed...
Sometimes I would let it coat in tallest gear to then shift quickly to say 3rd or so, and get the engine spin at higher rpm to a coast.


One thing to mention, though.
While it is true that brakes are wear item and are not covered by 10 years warranty, you need to consider that not using them will result in rust and stuck brakes... what in turn makes to replace them sooner than later.

 

[Chuzz]

You won't be able to replace the transmission while the car is under warranty simply because you see that as a means of "preventative maintenance". The ONLY way you can get it replaced is if something happens to it.

 

[ZiggyM5]

The ecu/tcu won't allow you to downshift at a speed/rpm that would cause damage to the engine or gearbox. You can try to downshift at 6,000rpm and nothing will happen - or at least that's how the AU-delivered GT has been set up.. It's also why the DCT will automatically upshift at/near redline even when in manual mode - which is something I really dislike but it's done to reduce wear and fatigue on both the transmission and the engine (valvetrains don't tend to like bouncing off the rev limiter)

Also, if you do use the paddles to downshift or upshift while it's in auto mode, and you want to return it to auto mode, just pull-and-hold the upshift paddle for about 2-3 seconds and it'll revert immediately (otherwise it'll hang in temporary-manual-mode for a while)

"just pull-and-hold the upshift paddle for about 2-3 seconds and it'll revert immediately"
Didn't know. I've learned something new today.

 

[aetb]

"just pull-and-hold the upshift paddle for about 2-3 seconds and it'll revert immediately"
Didn't know. I've learned something new today.

You're welcome It works on every Kia with paddles that I've driven over the past 8 years or so. Probably applies to paddle-shift Hyundais as well

 

[noturbonoproblem]

You're welcome It works on every Kia with paddles that I've driven over the past 8 years or so. Probably applies to paddle-shift Hyundais as well

Also applies to Mazdas and probably a bunch of other brands too

 

[aetb]

Also applies to Mazdas and probably a bunch of other brands too

That might depend on which year/model Mazda. We had a 2016 Mazda3 with the 2.5L engine and it didn't work in that, at least not in the Aus-delivered variant, you'd have to wait for it to go back to auto mode or flick the lever across to manual and back again