rome99LS

Whats the differance between this button? Wats the benefit of it being in power mode. I heard the the gas mileage isnt the same...plz help me understand this button.

PureDrifter

iTrader: (10)

transmission and throttle response differences, shouldn't not be a huge difference in mileage as the engine maps aren't altered.

in a nutshell:
normal mode=self-evident
power mode=sharper throttle response, transmission is more willing to downshift and will hold gears to the redline
snow mode=dampened throttle response, trans will start from 2nd gear instead of first and tend to hold a higher gear than usual to maintain traction in snow.

rome99LS

Oh ok makes sense, thanks PD. I took the intake cover off once and then took tsc off and put it pwr mode and as I was rollin I punch it and was gone.
Another day when it was raining I did the samething except sitting still pwr braked it and my boi said both rear tires were spinning. Does this car have Positive traction?

PureDrifter

iTrader: (10)

no, but if you look in the sticky you'll see a discussion on a possible LSD-like effect due to wear in the diff. no LS400 ever left the factory with a limited slip diff.

VanCityLS4

iTrader: (1)

Power mode = more fun.

On 98-00 models, does this button light up ? I think I've seen illuminated in another picture thread.

xtremex626

iTrader: (3)

^yes the power/ect/snow button does stay illuminated when the headlights are on in the first or second position. it's common to see the bulb go out as mine did too when i got it. it's an easy replacement which requires removing the shifter assembly/middle console.

not exactly too sure what bulb size it is but it's either a T3 or T4 neo wedge bulb.