i have a 06 g35 coupe with a automatic transmission, just curious, at 70 mph(in drive) my rpm is close to 3k, is this normal?

No. My RPM at 70mph is over 9000.

I would say its a little abnormal, Im pretty sure you should be at 3000 RPM at 80MPH

sounds normal

+1 for a 5AT 3K RPM corresponds to ~80MPH.

^+1

yep its ~80mph people have slight differences in there tach

are you gonna redline yet?

Not if you've swapped out your diff. I'm running 3250 RPMs at 80.

what is the normal speed for 6mts?

I'm taking SLICK for a drive this morning, when I get back I'll let you know exactly. You can bet what Marcus posted is on the $$, he's spent a few hours behind the wheel....
Gary

Yeah Id say its a lil less than 3k. It also depends on what your idle rpm is. Mine is exactly 1k.

My '04 AT at 70 (corrected for slightly larger diameter rear tires) = 2450

At 80 (corrected) = 2800.

If you're showing 3000 r.p.m. at 70 something isn't right. Your tachometer, or speedometer is off, or perhaps your transmission isn't shifting into fifth gear. Have you tried manually selecting fifth to verify it's operational?

All the gears works normal in manual mode, I have the stock differential. Is there a difference in gear ratio in a 04 and 06?

Of course Tim. I should have clarified I was talking about stock gears. Since I've done the diff swap (3.3 to 3.5) I went from 2900 to 3250 or so at 80MPH.

is there a switch on the automatics to turn overdrive off? that's my only guess