Chevrolet 6th Gen Camaro ZL1 & SS Complete GForce Performance 9" Rear End IRS Kit 2016+

For more Information about the differential click here!

All GForce Performance Engineering 9” housings are laser cut, CNC formed and tig welded for a flawless finish and unmatched strength. Housings feature vent and drain plug bungs as well bungs to run an optional diff cooler and provision for a temperature sensor. 9” kits are sold as a complete assembly that includes the housing, a third member (pumpkin), axles, stub shafts and a driveshaft. All third members come complete and setup by Strange Engineering with your choice of gear ratio. Although most kits are designed for the factory transmission, we can accommodate most common transmission options with a driveshaft tailored to fit.

GForce 9” Kits Include the following:
Strange S-Trac Street Differential - Pro-Gear or Spool Diffs available in the product options
Fabricated 9” housing (bolts to factory locations)
Heavy-duty mounts w/ solid bushings
35 Spline Inner and Outer Stubs
Renegade 9” axles - Outlaw upgrade available in the product options
All necessary hardware
Third member to housing
Housing and front mount to cradle
HD aluminum Strange third member
4” aluminum driveshaft - carbon or no drive shaft options available see the product options (New 4.0" aluminum driveshafts use upgraded tubing, billet Sonnax slip joints, and billet Sonnax direct bolt flanges)

*9" kits are not guaranteed to work with factory exhaust, and may require modification for driveshaft clearance
*Customer is responsible for E-diff sensor on ZL1 9" kits; There is no functionality with our 9" kit at this time.

Available Gear Sets : 3.0 3.25 3.50 3.70 3.89 4.11

What's a Strange S-Trac or Spool Differential?

S-Trac Street - The Strange S-Trac Street/Track Differential is the only option for GForce 9" kits intended for street use. Its forged steel, heat-treated, and fully machined case halves reduce weight, improve rigidity, and extend gear life. Inside are precision 9310 steel pinion gears that are vacuum heat-treated, cold-treated, and dry-film coated for maximum strength, longevity, and reduced wear Recommended for full-bodied street/track cars running low 9s or slower, the S-Trac delivers smooth operation across drag, road race, off-road, and autocross use. For drag-only builds, Strange suggests the S-Trac with Pro-Gear or a spool. Included gears can work in some drag applications depending on weight and power, but if tooth breakage occurs, Pro Gears are required.

S-Trac Pro-Gear - The Strange S-Trac Very Limited Street/Track Only Differential is built the same as the S-Trac Street differential but includes the Pro-Gear which is produced from a softer material, the teeth can flex as opposed to the standard S-Trac street gears that crack and break. The life expectancy can vary anywhere from 15 to 300 runs depending on the vehicle.

Strange Spool Diff w/ Standard Gear - The Strange Spool Differential is the for track use only. Spool differentials lock your axles ls to be a one:one ratio this makes your wheels spin at the same speed with equal amount of force which increases straight-line traction they also help with reliability as their is less moving parts in your differential. Due to its simplistic design, it is much stronger and lighter than any differential. This makes it the best choice for Drag Racing, Drifting, and other forms of motorsports that require uninterrupted transfer of power to both wheels. Spool Differentials should not be considered for a street application. Included gears can also be used in some Drag Race cars depending on weight & power If tooth breakage occurs, then Pro Gears will become necessary (See Below)

Strange Spool Diff w/ Pro-Gear - The Strange Spool Differential comes with Pro-Gears made from a softer material that allows the teeth to flex rather than crack like standard gears. Life expectancy can range from 15 to 300 runs depending on vehicle setup By locking both axles the spool differential delivers equal force to both wheels, improving straight-line traction and reliability with fewer moving parts. Their simple, lightweight, and ultra-strong design makes them ideal for drag racing, drifting, and other motorsports where uninterrupted power delivery is critical. However, spool differentials are not recommended for street use.

Fitment & Lowered Vehicle Information
GForce 9” Kits are designed to fit in the factory location and work with factory components with as little modification as possible. When installing a GForce 9” kit, it is up to the installer to check for clearance around all components, including potential clearance issues from drivetrain and suspension movement. Axle boots can sometimes be close enough to shocks or suspension that they could rub and cause a failure down the road. Most OEM shock mounts can be loosened and allow you to push the shock body away from the axle and gain a little more clearance to avoid any issues. Modification might be necessary for driveshaft clearance, especially with exhaust, specifically towards the diff, where the pinion height will be at a lower level, compounded by using a larger diameter driveshaft. 9” kits are not guaranteed to fit with ANY other aftermarket products. Aftermarket shocks, control arms, etc. may present clearance issues. If CV boots have clearance issues, low profile boots can be purchased at an upgraded cost. The low profile boots reduce the amount of available axle angle in comparison to the standard boots, so they are not ideal for lowered or high axle angle vehicles. If you have questions or would like to add low profile boots to your axles, please contact us for more information.

Damage Prevention
NO DRIVELINE COMPONENT IS BOMBPROOF! GForce does not put a power rating on any driveline components as there are entirely too many variables that can affect a driveline component other than just horsepower. We take great pride in building the strongest driveline components to fit certain applications, but it is important to know that YOU, the end customer, are responsible for proper installation and YOU, as the driver, are responsible for the lifespan of your axles or other driveline components.Most of the applications we are working with are heavy vehicles and we are often asking a lot of the driveline components, be it OEM or aftermarket. These heavier cars, paired with high torque levels make all driveline components more susceptible to failure due to small mistakes, such as wheel hop. Many customers understand that wheel hop, tire shake, tire skipping, tire chatter are all bad things but there is often a misunderstanding of how destructive it can really be. The heavier the vehicle and more torque the vehicle is making, the more your window of forgiveness begins to narrow. This can result in CV’s loosening prematurely and more severely, splined stubs and axle bars twisting or shearing, which is NOT a fault of the axle. So please use your best judgement when driving in any given scenario, be it on the track or the street.

It is worth noting that most wheel hop related issues rarely cause an immediate failure, with certain exceptions. The result of repeated cycling torque spikes will often weaken the material of a given component such as an axle bar or stub shaft. Then each subsequent hit will continue to weaken the component until it fails completely. If you know that you have driven through a particularly abusing situation, it would be wise to pull the axles and assess the splines of the inner and outer stub shafts as a maintenance procedure. If they have started to twist or shift, then you might be able to prevent a more catastrophic failure. We encourage all end users to read up on the appropriate measures that they can take to help prevent wheel hop with their specific vehicle. This can be anything such as aftermarket bushings, shocks, springs, control arms, tire type, or excessively low tire pressure. Two of the most fundamental pieces we look at to help control rear end movement and prevent wheel hop start with the cradle and differential bushings. Both of these bushing sets are often very soft from the factory and although they provide smooth ride quality, they allow a considerable amount of movement in a performance scenario. Which can lead to a number of concerns or issues.

If you have any further questions please email us at Sales@TREPerformance.com

Lowered Vehicle Information
GForce axle shafts were manufactured based on OEM suspension. Aftermarket shocks, control arms, etc. may present clearance issues. If CV boots have clearance issues, low profile boots can be purchased at an upgraded cost. The low profile boots reduce the amount of available axle angle in comparison to the standard boots, so they are not ideal for lowered or high axle angle vehicles. If you have questions or would like to add low profile boots to your axles, please contact us for more information.

Maintenance Information 
All driveline components will fatigue or wear over time depending on how the vehicle is driven and what level of performance is demanded from them. CV joints are a wear item and will see wear over time, but with our current design, axles can be sent in for service. So boots, fasteners, and CV assemblies can be serviced without scrapping the complete axle assembly. It is up to each customer to establish their own maintenance intervals based upon the manner in which their car is driven. Individual inner or outer splined stubs and axle bars can be replaced as well if they twist or are damaged due to wheel hop or simply from power levels exceeding capability of the material.

TREperformance is an Authorized Priority Dealer of GForce Performance Engineering.