Final Drive Gear Sets

From Nissan 350Z & 370Z Wiki

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Drivetrain

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Parts

There are several final drive gearing options for the 350Z and you should choose your particular gears based on: driving style, track setup, and power goals.

The 3.9 final drive setup is an economical way of improving acceleration in the 350Z and G35. Increases available power by 10% per gear, resulting in faster acceleration in every gear. Professional installation required. Only for use on 6 speed manual transmission models.

Please note that in addition to the parts shown, there are also several sizes of side lash adjustment shims that Nissan offers. There is no way for us to determine what size(s) your car might need. The ONLY way to determine the proper size lash adjusters is during the installation by a competant installer. For those with higher mileage cars or who want additional peace of mind during the install, there is a list of optional replacement parts.

1 OEM Gear Info
2 Table of maximum speeds
3 Notes
4 Available Gear Sets
5 Available Gears

OEM Gear Info

6spd Manual Transmission: 3.5

5spd Auto Transmission: 3.2

Table of maximum speeds

Table of max speeds
Gear	3.5 @6850	3.9 @6850	3.9 @7200
1st	38.9	35.1	36.9
2nd	63.5	57.3	60.3
3rd	90.8	82.0	86.2
4th	116.1	104.8	110.2
5th	147.1	132.9	139.7
6th	185.6	167.6	176.5

Notes

Minimal parts for installation

Pinion Nut $5
Pinion Crush Sleeve $9.50
Pinion Oil Seal $8.95

Optional parts for installation

Side Bearing (x2) $85
Side Bearing Oil Seal (x2) $12
Drain Plug Washer (x2) $3.90
Final Drive Gear Bolt (x10) $20
Final Drive Side Gear Cir-clip (x2) $1.40
Front Pinion Bearing $34.95
Rear Pinion Bearing $54.95

Available Gear Sets

Below are the available gear sets. There are signifacnt differences in price, but that does not reflect quality. The price of the 350evo gears has not been thoroughly explained, but up until December 2005, they were the only gears available in the United States. The Central 20 gears have finally been imported and are of exceptional quality. Who knows, 350evo might be purchasing from Central 20 and reselling them.

The Nismo gears are new to market and are priced much higher than the other two brands. This is typical of Nismo products.