Does RSX Type S have limited slip differential?

Yes. The Acura RSX Type S uses an Active Torque Transfer System (ATTS) that provides front-wheel-drive torque biasing similar to a limited-slip differential. The base RSX model does not have ATTS.

The RSX Type S, produced from 2002 to 2006, was the performance variant of Acura's compact hatchback. It featured a 2.0-liter i-VTEC engine, sport-tuned suspension, and drivetrain hardware designed to improve grip, including ATTS on the front axle with a clutch-pack arrangement that biases torque between left and right wheels in cornering.

ATTS explained: how it works and how it differs from conventional LSD

ATTS vs traditional LSD

The Active Torque Transfer System (ATTS) is an electronically controlled torque-biasing mechanism on the RSX Type S. It uses sensors and a hydraulic or electronically actuated clutch pack to shift torque across the front axle, providing a limited-slip-like effect by sending more power to the outside tire in a corner. It is not a conventional mechanical Torsen or clutch-type LSD, but it serves a similar purpose by reducing understeer and improving traction in turns.

Note that the base RSX uses an open differential; ATTS is a Type-S feature that differentiates its traction behavior. In US-market RSX Type-S from 2002-2006, ATTS was the defining solution for the front axle.

Model-year details and maintenance considerations

What follows clarifies when ATTS is present and how it affects maintenance and ownership:

• The RSX Type S (2002–2006) includes ATTS as standard, providing a front axle with limited-slip-like differentiation to improve grip during high-load cornering.


• The standard RSX (non-Type-S) uses an open differential, with no ATTS on most configurations.


• ATTS hardware can wear over time; maintenance can involve inspecting the clutch packs and the differential oil, and following Honda/Acura service guidelines for ATTS components.


• Track-driven or aggressive driving may increase wear; owners should monitor for signs like unusual tire wear or handling changes and have the system serviced by a qualified technician if needed.

In short, the RSX Type S does have a limited-slip-like device on its front axle, known as ATTS, distinguishing it from the base RSX. This helps with turn-in grip and overall handling performance.

Summary

Conclusion: Yes — the RSX Type S uses the Active Torque Transfer System (ATTS), a torque-biasing mechanism on the front differential that provides limited-slip-like behavior, while the base RSX relies on an open differential. For owners, ATTS contributes to improved grip in cornering and requires standard maintenance per Honda/Acura guidelines.

How do I tell if my differential is limited-slip?

You can tell if your differential is a limited slip by performing a simple test on a lifted vehicle or by checking for a specific tag on the differential housing. With the rear wheels off the ground and the vehicle in neutral, spin one wheel by hand; if the other wheel spins in the same direction, it's a limited slip. If the other wheel spins in the opposite direction, it's an open differential. 
Method 1: Test the wheels

1. Park and secure the vehicle. Park on a level surface, engage the parking brake, and block the front wheels to prevent rolling. 
2. Safely lift the rear. Use a jack to lift the rear of the vehicle and secure it with jack stands. 
3. Place the transmission in neutral. Make sure the transmission is in neutral. 
4. Spin one rear wheel. Rotate one of the rear wheels by hand. 
5. Observe the other wheel. 
   • Same direction: If the opposite rear wheel turns in the same direction as the one you're spinning, you have a limited slip differential. 
   • Opposite direction: If the opposite rear wheel turns in the opposite direction, you have an open differential. 

This video demonstrates how to test if your car has a limited slip differential: 45sERICSDIYGARAGEYouTube · Dec 8, 2018
Method 2: Check the tag

1. Locate the differential. Find the differential housing at the rear of the vehicle. 
2. Look for a tag. Check for a sticker or tag on the differential that says, "Use only limited slip differential fluid". 
3. Consider the tag's reliability. This tag can sometimes be missing, damaged, or removed, so the wheel test is a more definitive method. 

This video shows how to check the tag on the differential housing: 51sChrisFixYouTube · Nov 26, 2012

Does the Acura RSX type S have traction control?

Modern cars apply traction control through not just fuel cut, but also electronic throttle control or electrohydraulic brake actuators (brake vectoring). You're not going to get either of those in an RSX.

What cars have limited slip differentials?

Limited-slip in models that are rear-wheel drive or offer high power can also be helpful for safety and making sure that power is distributed to the best standard. Models like the Mazda MX-5 and BMW M3 include LSD as standard. You might also want to consider limited-slip if you're looking for a track car.

What year to avoid Acura RSX?

All model years of the Acura RSX (2002 to 2006) have been known to leak motor oil due to bad or failing oil pressure sensors. The oil pressure sensor is an important part of your engine because it maintains the engine's oil pressure level.