slick972

Hello guys. Long time lurker here.
I have a 2015 IS350 FSport.
I drive full automatic in Sport+ mode, and I notice whenever I decelerate, the RPM would spike up around 200rpm and back to normal within second. It is consistently when the gears are changing down. Is this normal? Thanks in advance for your input.

dnasians

iTrader: (4)

I'm not sure if this is a troll post.... but when the car (every car really) slows down, it will change into lower gears. When changing into lower gears, the engine needs to match the road speeds, aka up rev.

slick972

I believe I don't feel or see it when I am in normal or ECO mode. It is more prominent when I am in Sport+ mode. That is why I asked. Definitely have no time to troll. Thanks for ur input.

evident

In sport+ it tends to downshift more because its ready for you to accelerate again, so it's trying to stay in the powerband

nayuta

Lol are you worried about your auto Revmatching? Dont worry, it's a sport+ feature. Most good transmissions do it. In fact, you chose the Fsport so you paid for it. Even manuals now.

LexSense

iTrader: (2)

LoL, as everyone has stated - perfectly normal!

dteskmo

This freaks me out everytime. Punch it for a few seconds from dead stop, then off the throttle to avoid a speeding ticket, but the engine is revving out in too low of a gear. I understand why it is this way, but it doesn't upshift for several seconds. After a brief burst of speed in Sport Mode, is it best to hit the button to return to Normal, or do people upshift several gears using the paddle shifters?

evident

you can upshift with the paddles, or just keep it in normal/eco if it freaks you out...

Answer

Normal in sport mode. It keeps the revs higher to stay in the power band on case you get back on it.

Smitty17

dealer should have mentioned the rev matching when you bought it