i have auto g35c... i'm about to finish my break in period... and my question is i'm gonna use manumatic mode all the time after break in period and will that hurt my tranny in long term?? i know out AT tranny made for manumatic but still curious that it will handle if i use all the time... thanks..

 

Used properly, no, although you'll get the normal extra wear and strain from higher revs and engine-braking. You may want to avoid manually downshifting from 2nd to 1st as it usually clunks rather badly and sounds unhealthy. Just let it drop down to 1st automatically when your revs drop too low. Also, you may want to switch to a better transmission fluid if you're planning on driving around a 6600 rpms all day, just to be safe.

-Jack
Obsidian '03 G35 Sports Coupe
Titanium '03 MX-5 Shinsen #532

 

thanks for advise and one more question...
what brand name are some good transmission fluids? thanks..

 

From page 8-10 of the owner's manual:

Using automatic transmission fluid other than Genuine Nissan ATF Matic Fluid J will cause deterioration in driveability and automatic transmission durability, and may damage the automatic transmission, which is not covered by the INFINITI new vehicle limited warranty.

Use alternatives at your own risk.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

I've heard that other people are using synthetic tranny fluid without incident. I myself am a stickler for going by the book (only mineral-based oil for me), but I question whether standard Nissan fluid "J" is formulated to withstand frequent running near redline (which is not what automatics generally do). I have a feeling the tranny runs hot in general, judging from the rice krispies sounds coming from under my car when I'm done driving.

But the caveat is well-noted. Definitely don't swap out fluids unless you've got an Infiniti service center on the hook to take the blame.

-Jack
Obsidian '03 G35 Sports Coupe
Titanium '03 MX-5 Shinsen #532