ya i havent seen any info on the before and after difference on the z with the 3.9 final gear. does anyone no what the difference is on the 0-60 and the 1/4? please need the info really want to know if i should consider the mod!! and for the $500 every thing need comes with the final gear right? how much does it cost for the install? and hours of install?

 

And what is the stock gear ratio BTW.

 

stock gear ratio is 3.3 for auto and 3.5 for 6mt. i think most shops charge around $400-500 for install. usually you need to buy different sized shims to make it fit. some vendors sell complete kits to make it easy. shoot some PMs to some vendors for more info.

also, i have read it offers 10% more acceleration in each gear

 

After install, faster accleration, more shifting, lower gpm, more excitment.

 

this is off the subject but i just wanted to tell u guys i have saw 5 dodge vipers in 2 days! i live in tucson, az and i only see 1 like in 1 year and ive seen 5 in 2 days all mutiple hours before each. imnot sure if theres a meet or somethen but i just thought it was out of the ordinary for me. but ya back to the question. need some answers!

 

For the pricing questions, the best way to go about it is to contact multiable vendors in your area.

 

i'd want to do gears but it would cost just as much to install the gears as to the price of the gears themselves..
i think replacing gears one should either break the stock lsd(or to sell it) to upgrade the lsd too (cusco?)

 

The best way (price wise) to do internal mods is to decided what mods you want, cams, final drive, headers, etc....and then have the install all done at once.

 

the best way is probably this...
do not mods but save $
then once you saved money for cams, gears, and FI you'll probably have about 20000 dollars...
then you invest in my uber money cash project
yielding you 10-15% a year to do mods

anyway...

 

You should first determine what exactly your performance goals are and keep your budget in mind. Here's a thread that you should check out:

https://my350z.com/forum/engine-and-drivetrain/50429-new-350z-owners-read-this-before-doing-any-modifications-to-your-z.html

If you plan on staying NA the 3.9 gears are a great choice. Yea, the cost of the install is about as much as the gears. It cost me about $1400 total including the shims and all. Not too bad considering I could have easily spent that on a catback exhaust and gotten no where near the performance IMO. If you don't track the car very often the stock diff. will work fine. I've had no problems whatsoever and am more than happy with it.

 

j u are way too hyper on the forum.

 

If you are staying NA this is a GREAT racing mod!! Crazy lauching and acceleration!