Nigel-JDMParts

iTrader: (74)

Are you sure about that??

JGard18

I call BS on that. I've disabled TC and put it in manual mode and it's still upshifted for me.

jcheng

Yup. It does not auto shift when Traction is off

JGard18

Are you doing the pedal dance to turn off TC, or just holding down the TC button?

CTLG

Well, that's because you didn't properly disable TC. While totally stationary, hold down the TC button for more than three seconds until you get the TC light in the dash. This totally disables the TC and associated systems. At this point, you're free to slam the revlimiter (not that you should) all you want. I drive the car in this mode 98% of the time, as the TC system is very invasive.

CTLG

No pedal dance is needed in the 3is.

JGard18

I'll try it again tonight, but I've done this multiple times (holding down the button for 3+ seconds) and the car still auto-upshifts for me.

Speaking of TC. If I just press the button for the simplest disabling of TC, it turns itself back on after one launch. So dumb.

CTLG

Couple of questions:

1. What model do you have? My car is a 3IS 350 F-Sport. It works every time.

2. Are you in manual mode? (Silly question, but I had to ask).

The TC will turn off temporarily but just pressing the button quickly (or while moving) but will re-engage after 30mph. So if you didn't hold the button down for 3 secs and didn't get the TRAC light on the dash, it's going to auto shift after you launch due to being re-engaged after 30mph.

This quick TRAC disable feature is more for situations like getting stuck in sand/snow or going up a steep incline in the snow/rain.

4TehNguyen

iTrader: (1)

oh man did not know you can get rid of that auto upshift at redline. It was annoying me at the track last time but I didnt disable TC.

JGard18

yeah, I have a '14 IS350 F Sport. And yes, in M mode.

I'll try again, maybe I thought I disabled it and I hadn't...but I know this has been a bother of mine since I bought the car and I've tried a number of things to get it to stop upshifting for me and haven't found anything that works.

jcheng

As mentioned M mode and I usually put it in Sport + mode but Sport mode should work as well

8jml8

I got my car up to 150mph on the dyno, could've done a little more if there was room without hitting rev limiter.

CTLG

Is it a 3is 250 or 350? RWD or AWD? What did you put down and what kind of Dyno was it?

jennypenny

Hmmm.. is it because its hot in your country? above sea level?

try doing it at night.

my air con is switched off. that should help release some horses

CarZy

That's not so bad considering that Drive Arabia achieved 0-100 kph in 7.5 seconds for an IS350. They also mentioned that it was July and cars had less than 200 kms on the odometer. July heat in Dubai is very intense... I've lived there for a few years so I speak from experience.

http://www.drivearabia.com/lexus/2014-lexus-is-350.html

Read this article also which compares the acceleration timings of an IS300 before and after the break-in period. I know we all have our opinion on the break-in period and methods, so lets keep that aside.

http://www.drivearabia.com/news/2012...ns-some-speed/