I am confused 3rd gen Drive Train ?
#17
Instructor
iTrader: (1)
Direct shift is still a single clutch auto transmission whereas a DCT has two clutches and is still a manual automated transmission so there isn't a clutch pedal. Two different things. And it shows too when you drive it.
He's probably talking about dct at slow speeds being quirky and jittery. A friend of mine with a GTR said that too. But that to me is a small price to pay vs. the benefits of instant shifts and downshifts, and we all know that the IS sucks at downshifting (8th to 4th in about 5 seconds...)
And more on topic, i've driven the regular 6 speed IS 250 and I can say that there isn't much difference between the 8 speed and that as far as shift times and overall feel. The standard 6 speed shifts really fast, nothing like the previous gen. So no one should feel like they're missing out on anything here.
He's probably talking about dct at slow speeds being quirky and jittery. A friend of mine with a GTR said that too. But that to me is a small price to pay vs. the benefits of instant shifts and downshifts, and we all know that the IS sucks at downshifting (8th to 4th in about 5 seconds...)
And more on topic, i've driven the regular 6 speed IS 250 and I can say that there isn't much difference between the 8 speed and that as far as shift times and overall feel. The standard 6 speed shifts really fast, nothing like the previous gen. So no one should feel like they're missing out on anything here.
Direct shift means the lockup torque converter is locked from 2- 8 gears in manual mode. So the slippage from gear to gear does not happen since the torque converter is locked (torque converter is what really gives automatics the "smooth" feel as it glides from gear to gear)..
This lockup gives the shift a crisp feel with a brief pause between the shifts making it feel like a manual transmission.
Only the Lexus LFA has an automated (robotized) manual transmission in the Lexus line up.
This lockup gives the shift a crisp feel with a brief pause between the shifts making it feel like a manual transmission.
Only the Lexus LFA has an automated (robotized) manual transmission in the Lexus line up.
#18
#19
Lexus Test Driver
Thread Starter
#20
There are several DCTs on the market now, each of them with a different "personality." For example, most people hate the DCT in the Focus because it's generally clunky and never in the right gear. VW / Audi DSG requires expensive fluid changes and has had it's own problems. BMW SMG... terrible; I dont know how the new one is.
I dont think this car is "raw" enough to really require the DCT... The DCT in most of these cars is more about marketing than it is about actually performance benefits.
I dont think this car is "raw" enough to really require the DCT... The DCT in most of these cars is more about marketing than it is about actually performance benefits.
#21
exclusive matchup
iTrader: (4)
There are several DCTs on the market now, each of them with a different "personality." For example, most people hate the DCT in the Focus because it's generally clunky and never in the right gear. VW / Audi DSG requires expensive fluid changes and has had it's own problems. BMW SMG... terrible; I dont know how the new one is.
I dont think this car is "raw" enough to really require the DCT... The DCT in most of these cars is more about marketing than it is about actually performance benefits.
I dont think this car is "raw" enough to really require the DCT... The DCT in most of these cars is more about marketing than it is about actually performance benefits.
#22
Forgot that about the SMG, but my comments were generally toward non-conventional (non torque-converter) automatic transmissions. I understand chasing this idea for the M5, M3 or IS-F but 200 and 300 hp cars don't require it.
#24
I'm not sure if the transmission in the 3is behaves the same, but we can downshift in the isf pretty quickly. If we are cruising in sport manual mode in 8th gear for example, we move the gear shift right and pull the down paddle shift. That'll drop you to 4th or 3rd gear almost instantly. Then we move the gear left again. It's one more step than a dct but it's pretty easy to do.
This is mostly right except the part about the pause and the making it feel like a manual transmission.
This is mostly right except the part about the pause and the making it feel like a manual transmission.
Last edited by TheShaddix; 02-27-14 at 02:52 PM.
#26
Direct shift is still a single clutch auto transmission whereas a DCT has two clutches and is still a manual automated transmission so there isn't a clutch pedal. Two different things. And it shows too when you drive it.
He's probably talking about dct at slow speeds being quirky and jittery. A friend of mine with a GTR said that too. But that to me is a small price to pay vs. the benefits of instant shifts and downshifts, and we all know that the IS sucks at downshifting (8th to 4th in about 5 seconds...)
And more on topic, i've driven the regular 6 speed IS 250 and I can say that there isn't much difference between the 8 speed and that as far as shift times and overall feel. The standard 6 speed shifts really fast, nothing like the previous gen. So no one should feel like they're missing out on anything here.
He's probably talking about dct at slow speeds being quirky and jittery. A friend of mine with a GTR said that too. But that to me is a small price to pay vs. the benefits of instant shifts and downshifts, and we all know that the IS sucks at downshifting (8th to 4th in about 5 seconds...)
And more on topic, i've driven the regular 6 speed IS 250 and I can say that there isn't much difference between the 8 speed and that as far as shift times and overall feel. The standard 6 speed shifts really fast, nothing like the previous gen. So no one should feel like they're missing out on anything here.
#27
There is no sport + mode for the 6 speed transmission.
Also Lexus markets their 8 speed DIRECT SHIFT transmission as one of its best designs ever, even if you can't feel the shift differences between the two transmissions.
Also Lexus markets their 8 speed DIRECT SHIFT transmission as one of its best designs ever, even if you can't feel the shift differences between the two transmissions.
#28
Lexus Champion
This is not correct. The 350 AWD F Sport does indeed have Sport +. The difference between Sport and Sport + is the AVS settings, and nothing to do with the transmission.
#29
Lexus Test Driver
Thread Starter