Why a 6-speed transmission?
03-03-07, 09:49 AM
#16
Lexus Test Driver
I wonder why the O/D button wasn't put on the lever so you can manually engage it like on most vehicles. The transmission probably gets really hot driving in the city when using auto. Imagine stopping and going while shifting through all 6 gears, then stop minutes later. Whew, hope cooling is efficient to prevent premature breakdown.
It's just so wierd how the first two gears on the automatics shift soooo darn fast. I really like a longer shift and let that RPM climb up in the auto mode without having to shift. Maybe it is about saving gas.............
It's just so wierd how the first two gears on the automatics shift soooo darn fast. I really like a longer shift and let that RPM climb up in the auto mode without having to shift. Maybe it is about saving gas.............
The car was designed to get to 6th as fast as possible for fuel savings, but I find the transmission in this car to be fantastic. It changes gears very fast - much faster than I could row my own if I had a 6 speed manual.
With modern transmissions, manual trannys are becoming WAY overrated, IMO. They're fun, but you'd have to be a damn good driver to realize any performance gains these days.
03-03-07, 10:55 AM
#17
You can view what gear the tranny is in by looking at a certain page in the information screen. Keep half of an eye on that when you are driving, and you will notice that the car favors the higher gears. This is because, as everyone has said, you get better gas mileage in a higher gear. Also, the engine is quieter with the lower RPMs.
When I had a 250 as a loaner, I had the transmission in auto at about 40 mph and the car was already in 6th gear. Hah! In the Vette I would just about be coming out of 2nd gear by 40 mph.
When I had a 250 as a loaner, I had the transmission in auto at about 40 mph and the car was already in 6th gear. Hah! In the Vette I would just about be coming out of 2nd gear by 40 mph.
03-04-07, 11:14 AM
#18
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I wonder why the O/D button wasn't put on the lever so you can manually engage it like on most vehicles. The transmission probably gets really hot driving in the city when using auto. Imagine stopping and going while shifting through all 6 gears, then stop minutes later. Whew, hope cooling is efficient to prevent premature breakdown.
It's just so wierd how the first two gears on the automatics shift soooo darn fast. I really like a longer shift and let that RPM climb up in the auto mode without having to shift. Maybe it is about saving gas.............
It's just so wierd how the first two gears on the automatics shift soooo darn fast. I really like a longer shift and let that RPM climb up in the auto mode without having to shift. Maybe it is about saving gas.............
03-04-07, 12:08 PM
#19
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Since our cars aren't torque monsters, the 6 speed very likely helps in acceleration versus hurting it. It definatly helps when going from a roll, as you will rarely be in a "bad gear"
03-05-07, 01:28 PM
#20
Tech Info Resource
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6 gears means you don't need the torque to be as wide or as flat as you would with fewer gears. It also means you can design the engine for best efficiency over a narrower range of rpm to get good fuel economy. So you get to have your cake and eat it too. Better acceleration and peak power with better efficiency in your typical operation range.
03-05-07, 05:29 PM
#22
Lexus Test Driver
6 gears means you don't need the torque to be as wide or as flat as you would with fewer gears. It also means you can design the engine for best efficiency over a narrower range of rpm to get good fuel economy. So you get to have your cake and eat it too. Better acceleration and peak power with better efficiency in your typical operation range.
The M5 is a good example. It comes with a 7-speed SMG or 6-speed manual transmission. Guess which option results in quicker runs to 60 and 1/4 mile?
Last edited by 15951; 03-05-07 at 05:32 PM.
03-07-07, 01:24 AM
#25
besides the fact that this is my first car and I've always wanted to learn how to drive a manual transmission, was gas. other than that driving a manual is a lot better than auto, you get a better feel for your car and it keeps you from doing stupid things when you multitask.
6MT is more fun than i expected !
03-07-07, 01:30 AM
#26
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But the sport shift kind of does the same thing, just without the clutch. I notice the auto shifts through each gear at around 2500 RPM on average for me. When I shift manually, the car really goes fast. I tend to shift not too aggressively, like around 3500RPM-4000RPM. I can get a good jump on most cars by doing that. I beat a Honda Civic at an intersection. Or does that not even count at all? 
yup that what i was told
03-09-07, 05:13 PM
#28
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When I went to the product knowledge class better fuel consumption was it.. Aside from that, Lexus is looking to get away from MT... Don't now if it will happen...
03-09-07, 05:46 PM
#29
Tech Info Resource
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There's a conundrum for you. They tell you they put a lot of gear ratios in the box to save gas, but still use a torque converter which is inherently inefficient compared to a manual. Sounds like they're talking out of both sides of their mouths.
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03-22-21 08:11 AM
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