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Driving with pwr on isn't recommended, all it does is shift at higher rpm and slightly up the line pressure. If you want firmer shifts get a tune.
Pwr mode is used for towing only and it will waste fuel for no reason otherwise
The1 who's on this forum (I think it was him) said that the power switch also changes the tune in the ECU slightly which in fact should give more power. I'm still in a little bit of doubt about it though, but he's the one who tunes the bloody things.
Agree with most comments above.
Mine is stock as a rock behind a stock engine but it does get flogged often. Best thing to do is change fluid when it starts looking off colour. I do it about once a year or so running Castrol dexIII. Do a search how to change fluid without removing the pan.
An extra cooler is good but be aware you shouldn't bypass the rad as that is way more efficient at dissipating heat than a standard size oil to air cooler.
Also, if your engine is FI or a V8 you should start in third before giving it the boot as manual third applies extra overrun clutches on the 3rd gear shift which is a known weak link
The1 who's on this forum (I think it was him) said that the power switch also changes the tune in the ECU slightly which in fact should give more power. I'm still in a little bit of doubt about it though, but he's the one who tunes the bloody things.
No it doesn't. The1, Delco, immortality dismissed it. I used to think the same thing but head over to PCM hacking and you'll see the switch only affects the trans map, not ECU (like ignition, AFR, etc..). Drops the shift/kickback points vs. RPM and speed, increases line pressure and holds gears longer as shady said.
If anything using PWR is better on the trans, like a shift kit and/or corvette servo, the idea it's 'bad' is silly, no offence. I've had mine on for 75% of my cars life (since 2006 and 80k). There's no frivolous TC lockups (you know at 50kmh cruising on a side street) and less changes up down the range overall because it holds gears. These are the things that wear out clutch packs. If you know your right foot well, you can manage changes below 3k rpm anyway, so the motor doesn't have to scream.