My theory why the IS350 doesn't come with a MT
11-08-05, 01:49 PM
#61
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Info on the RA60 6 Speed
The specific notes for that X-Runner transmission from my tech documents say:
All new RA60 / F 6-speed manual transmission
1. light weight, low friction design
2. for high torque, high rpm engines
a. shared w/ V6 Tundra
Gear Ratios
Type
I - 4.171
II - 2.190
III - 1.488
IV - 1.193
V - 1.00
VI - 0.849
REV - 3.607
I don't know why this couldn't be applied. Obviously it was designed for low down torque from a truck based engine, but adjusted gearing aside, the basic transmission should be a viable option.
All new RA60 / F 6-speed manual transmission
1. light weight, low friction design
2. for high torque, high rpm engines
a. shared w/ V6 Tundra
Gear Ratios
Type
I - 4.171
II - 2.190
III - 1.488
IV - 1.193
V - 1.00
VI - 0.849
REV - 3.607
I don't know why this couldn't be applied. Obviously it was designed for low down torque from a truck based engine, but adjusted gearing aside, the basic transmission should be a viable option.
11-08-05, 02:21 PM
#62
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You guys sound like Industrial Engineers =) I'm suprised I didn't hear some references to six-sigma and Demming in there...haha
I agree whole-heartedly with your assessment. It's why the Japanese manfuacturers are bettter than all the rest.
I agree whole-heartedly with your assessment. It's why the Japanese manfuacturers are bettter than all the rest.
Originally Posted by flipside909
Have you ever studied Toyota's method of manufacture? They like to use the Just in Time method. If you've ever had the opportunity to visit a Toyota manufacturing plant (i've been to NUMMI here in Fremont), you will understand their ideology. It's a simple method in the big picture, but it's a very tight and complex system that works very well. Throwing in a manual tranny variant to the assembly line requires alot more work than just stuffing in a tranny and mating it to the engine. And obviously the CARB/EPA standards just add another hurdle to it. They figure the larger sales volume of automatics will make them more money than having to resort to building 10 MT IS350s out of 100 vehicles. The slow sales of manual tranny Lexus' stem back from the 90-91 ES250, 92-93 ES300 and even the 92-98 SC300. It was very rare to find these cars in manual, let alone hard to sell. Just ask any Lexus salesperson that's been with Lexus from the beginning.
11-08-05, 04:08 PM
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Originally Posted by jet864
Isn't this the exact reason that the 199(6?) Supra didn't come with a manual transmission? Emissions problems? 
Seems like it could be a credible reason.
http://www.musclecarclub.com/other-c...ta-supra.shtml
James
Seems like it could be a credible reason. http://www.musclecarclub.com/other-c...ta-supra.shtml
James
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