Whats the gear ratio in a 2004 5 speed auto?
Also give me a run down of all the gear ratios 2004-2008 4 AT, 5 AT, and manual?

 

Partial answer... (only low & high gear + final drive ratios).

http://forums.maxima.org/showpost.ph...6&postcount=25

No changes between model years.

 

Gear ratio 6 M/T 4 A/T 5 A/T

1st 3.153 2.785 4.657
2nd 1.944 1.545 3.032
3rd 1.392 1.000 1.982
4th 1.055 0.694 1.341
5th 0.809 - 1.018
6th 0.630 - -
Reverse 3.002 2.272 5.114
Final drive ratio 4.133 3.789 2.440

Helical Limited-Slip differential (M/T only)

 

I thought I could find this info in the book I have -- "Selling Maxima" -- but it was not there. The post above is hard to read, so I will repost the info with more space between the numbers.

Gear Ratios for different Trannies -- excluding the Torque converter effect on ratio in the A/Ts:
Gear __ 6 M/T __ 4 A/T __ 5 A/T

1st ___ 3.153 __ 2.785 __ 4.657
2nd ___ 1.944 __ 1.545 __ 3.032
3rd ___ 1.392 __ 1.000 __ 1.982
4th ____1.055 __ 0.694 __ 1.341
5th ____ 0.809 _________ 1.018
6th ____0.630
Reverse _ 3.002 _ 2.272 __ 5.114
Final ratio 4.133 _ 3.789 __ 2.440

While I can't vouch for these numbers (except the final drive ratios -- which I provided earlier), they seem reasonable.

 

http://www.nissannews.com/ --> Nissan --> Maxima --> Specifications. brio_max is correct.

 

 

I'm confused whats the final drive ratio? Why is the 4 A/T higher then the 5 A/T final drive ratio when first gear is so much higher in the 5 A/T over the 4 A/T?

 

I'll try to keep it simple & easy to understand.
Final drive is the Differential ratio [in a rear wheel drive car this is known as the rear end ratio] so take any of the gear ratios and multiply it by the final drive ratio to get the drive ratio in that gear.
Lets say 5AT [1st gear] 4.657 X 2.440 [final drive] = 11.36306 this means the engine has to rotate 11.36306 times [at the flywheel] to rotate the drive wheel [FWD or RWD] one rotation [this is why the engine RPMs are higher in 1st gear]
Also when taking about gear ratios the higher numbers are actually called low ratios [as they are your lower gears] so yeah it's a little confusing, but then gears are the most complex parts to machine

Also to answer your 2nd question about "Why is the 4 A/T higher then the 5 A/T final drive ratio when first gear is so much higher in the 5 A/T over the 4 A/T?"
First gear [numerically higher]
5AT [1st gear] 4.657 X 2.440 [final drive] = 11.36306 = a little higher RPMs than the 4AT
4AT [1st gear] 2.785 X 3.789 [final drive] = 10.55236

high gear [the highest gear, numerically lower]
5AT [5th gear] 1.018 X 2.440 [final drive] =2.4839 = a little lower RPMs than the 4AT
4AT [4th gear] 0.694 X 3.789 [final drive] =2.6293

When you have a 5sp vs. 4sp or a 6sp vs. 5sp, you have more ratios [gear choices] to play with, so you can have your 1st gear lower [numerically higher] to get the RPMs up, and have the following gears closer in ratio [to keep the rpms up as you go thru the gears, because an internal combustion engine develops max HP & TQ at higher RPMs] the name of the game is to get the RPMs up & keep them up