Z1 370Z / G37 Final Drive Differential Upgrade Kit - Z1 Motorsports - Performance OEM and Aftermarket Engineered Parts Global Leader In 300ZX 350Z 370Z G35 G37 Q50 Q60
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Z1 370Z / G37 Final Drive Differential Upgrade Kit
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Z1 370Z / G37 Final Drive Differential Upgrade Kit

starstarstarstarstar_half 4.5/5 - (2 Reviews)
Fits models: 370Z / G37 / Q60 2014-2016...

Product Description

Z1's Final Drive Differential Upgrade Kit includes everything you need to change your Final Drive Gear Ratio and Upgrade / Update your rear differential. If you are going to remove the differential why not only do it once.

Final Drive Gear Set

For those of you looking for increased performance off the line we now offer this Nissan OEM final drive ring and pinion gear set.  These gears will fit 03+ model differentials, manual transmission model cars only, and will increase acceleration.  This of course comes at a trade off of higher cruise speed RPM and decreased fuel mileage.

Please note that installing a ring and pinion requires precision setting of the bearing pre-load and clearances to complete the job. When installing be sure to keep the factory shims in their respective locations. Shims should not need to be changed.

It is highly recommended that an experienced mechanic install this ring and pinion gear set as excessive noise or even catastrophic failure can result from improper installation.  If you would like to have your gear set installed at Z1, please contact us at [email protected] for an installed price.

Differential Bearings and Seals

This kit is made up of OEM Nissan Differential Bearings and Seals needed when rebuilding your differential. This kit includes everything needed to make your differential like new when installing Ring and Pinion Gears and / or upgraded limited slip differentials.

Included in the Bearing and Seal Kit:

  • 2 X Nissan OEM Differential Side Carrier Bearings
  • 2 X Nissan OEM Differential Side Oil Seals
  • 1 X Nissan OEM Inner "Back" Pinion Gear Bearing
  • 1 X Nissan OEM Pinion Crush Sleeve
  • 1 X Nissan OEM Outer "Front" Pinion Gear Bearing
  • 1 X Nissan OEM Pinion Oil Seal
  • 1 x Nissan OEM Pinion Nut

Differential Cover, Fluid, and Bushings

With the Z1 kit you have new differential bushings, an improved Z1 Motorsports Differential Cover, and the best oil on the market. We even include a tube of ultra gray so that you have everything but the tools to complete the job.

When the stock rear differential bushing fails you often end up with a lot of slop and even clunking in the rear end. By upgrading to the urethane bushings you stiffen up the rear end to handle harder launches and smoother shifts. Plus with the upgraded fluid you don't have to worry about oil breakdown at higher temperatures.

Don't skimp out; do the entire kit with Z1.

Includes your choice of the following:
Z1, Energy Suspension, Whiteline, or SPL Front and Rear Differential Bushings  (ES Bushings include Z1's Replacement Bushing Sleeve)
3 Liters of Red Line or Motul 75w90 or Motul 75w140 Differential Fluid or OS Giken 80w250
Z1 High Capacity Differential Cover
1 Tube Ultra Gray Silicone

Please choose the appropriate options below.

If you are unsure of your current gear ratio, please take a look at the Gear Ratio Chart found HERE.

 

*** This item does not qualify for any additional discounts or promotions ***

Available Options:

Please review the product description if you are unsure about any of the options below.

Fluid Type: Gear Ratio: Bushing Type:

Quantity:

In stock, ready to ship. 
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List Price: $1,383.57
Special Price: $1,249.99
You Save: $133.58 (10%)

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What our customers say

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John
April 14, 2021
Took this to a shop locally to have the diff rebuilt. The shipping cost to Z1 from Oregon FedEx was $300 and I would have had to build the pallet, Highly recommend professional rebuild as there are no shims included in the kit (kinda impossible to guess the shims you need), and you will need a special lash measuring tool (a shop that knows what they're doing will have that tool). Only one BAD thing happened to me. The Z1 diff cover was missing the hole for the vent tube. It wasn't drilled out where it was supposed to be. Had to pay the shop $50 to add one and I had to show them a photo of where it was supposed to be. After everything was completed, what a beautiful rear diff. So glad I went with this upgrade.
starstarstarstarstar
Tyler
October 4, 2018
Great kit, gears are well cut. All the bearings and seals are high quality from Nissan. The differential cover is beautiful and incredibly well designed. The inner shape isn't much different from factory R200 which is good in terms of maintaining proper lubrication and windage. The fins extrude down below the differential housing for increased cooling efficiency. And the cover has an extra port for an external pump which I thought was pretty cool. Special tools are required so don't do this yourself unless you are very well versed with this type of work. Precision is everything. As outlined in the item description, I did not have to re shim anything. Thats a win all by itself. 3.9 gears are very noticeably more aggressive. Still breaking them in but ran it on the lift for a while to start and 70-80 mph was around 3k rpm. Highly recommend