tigmd99

Link: http://www.canadiandriver.com/articl...ansmission.htm

Cool short article on it.

BigMikeISF

Nice article! Seemed like they really like the 8 speed sport direct shift

foup

Since the torque converter is only used in manual and in first gear I am assuming that the best acceleration times can only be obtained in manual mode then? Were those 0-60 or 1/4 mile tests made by the car magazines done in manual or in auto?

Anyone knows? Also I am not sure I understand about the upshift times in manual mode. The 0.2 sec of computer thinking is only for auto, isn't it (because in manual the user selects the gear, which most of the time is one up or one down and that does not require software thinking?) If it's not then the 0.1 sec upshift time would be misleading?

Any info on this? Thanks.

tcoury

The shifts are in .1 seconds, regardless of auto or manual mode. The .1 seconds is the amount of time it takes the transmission to engage the next gear

dbastidas0

sorry tcoury but your wrong..the shifts are only .1 second in M mode...in auto its about 0.3...thats why if you notice, if you floor it in auto you will notice a minor delay when it shifts gear but in M mode, virtually no delay.. try it out and you will see

dbastidas0

and foup, the 0.2 second shift time is reffered to the down shift.. when you downshift at high rpm, the engine goes to neutral and then shifts to the appropriate rpm according to your speed...this is what causes the minor delay resulting in the 0.2 downshift time..and to awnser your other question...yes the best acceleration times can only be reached in manual mode.. i think there is a youtube video where a IS- F owner is using the GTEC and he makes 3 passes 2 in manual and one in auto...from 0-60.. i beleive his two times in manual where 4.5 and 4.6....in auto it was 4.8

foup

Ok, that makes sense: 0.1 sec upshift in manual, 0.2 sec downshift in manual and 0.3 sec in any gear change in automatic. Was this info published somewhere by Lexus or is that just various interpretations I have seen here and there?
Thanks.

dbastidas0

i did read it somewhere.. to be quite honest i dont remember where...i just have a nack for rembering things that I find intresting and I love my car so I try to know as much as possible about it... hope this info was useful..have fun

foup

Thanks for the feedback.