Purple: System Initialisation
System is waiting for valid speed readings. Initialisation phase is complete once car starts moving
The Plug-n-Play Drift‑Ready Electronic LSD
for II generation
Lexus GS & Toyota Aristo
for II generation
Lexus GS & Toyota Aristo
eLSDtune is a drift-oriented Electronic Control Module developed as a smarter, more accessible, maintenance-free alternative to traditional limited-slip differentials.
Classic LSDs work well - but they’re expensive, require a differential rebuild, and need a professional shop to install. eLSDtune delivers the same core benefits in a fully plug-and-play package that installs in just 10–20 minutes with basic tools.
No mechanical work. No shop time.
Just plug it in and go.
Just plug it in and go.
Using your car’s factory VSC (Vehicle Stability Control) system, eLSDtune simulates a real limited-slip by actuating solenoids manifold to apply and modulate braking force to the faster-spinning rear wheel individually - instantly transferring torque to the opposite side until both match. Rear wheels speed difference stays tightly controlled within 10–20%, giving you consistent and predictable traction through every slide.
After over a year of development and real-world tuning, eLSDtune transforms the driving experience. Compared to an open differential, it’s a true night-and-day difference - smooth initiations, rock-solid stability at angle, and effortless control whether it’s dry, wet, or snowing.
Compatible with
2nd generation:
2nd generation:
Lexus GS300/400/430
Toyota Aristo
ABS/VSC System must be fully operational and have no active faults
The system operates only when VSC is set to OFF, keeping your car’s daily driving completely intact. The module installs discretely behind the dashboard, out of sight, maintaining a clean, factory-original look - as if it was there from the very start.
🔻 Check out the demo video below to see eLSDtune in action - and compare it directly to stock.
Demo
Nerdy stuff
eLSDtune is designed to stay physically isolated from factory system, outside of conditions where LSD input is required. It calmly sleeps while you daily drive your car, effectively keeping everything fully stock, and once VSC is OFF - it starts actively monitoring the speed of all four wheels, to instantly jump in once needed.
The very moment you kick that gas pedal and get the rear end spinning - an open diff shows its weakness by letting one wheel rest - either heavily underdelivering, and making your drift initiation unpredictable, messy and chaotic, or worse, maintaining grip so nothing happens and you feel and look silly.
Not anymore. The unit starts reacting the moment speed difference exceeds 20%, by reconfiguring VSC system to take over control of rear brake caliper solenoids. And it does that in a way, that tricks VSC module into not registering a fault.
First LSD action kicks in just 30ms after trigger conditions are met. Solenoids are actuated, the fast wheel’s brake caliper is pressurised, the open diff transfers torque to the “lazy” wheel, and traction breaks evenly. Exactly as it should. Such engagement speed makes transition between open diff and LSD seamless, providing you with very smooth, predictable, and linear initiation, that is very easy to “catch”.
Modern, advanced electronics and carefully, precisely calculated load balancing by software enables eLSDtune to drive solenoids in a dramatically more efficient way, allowing very frequent brake inputs - all while still keeping electrical load strictly within official manufacturer specifications.
No overpowering or overheating solenoids. No abuse.
Rear wheel speeds are equalized up to 5 times a second, swinging only between 10 and 20% difference. Inertia does not let even those small pulsations through, resulting in an incredibly smooth slide and great stability at an angle.
00:02:04.136 -> ---Seission start---
00:02:04.136 -> Start: FL:3.22 FR:4.16 RL:6.30 RR:5.21
00:02:04.136 -> Δ 1.21
00:02:04.136 -> Finish: FL:3.74 FR:4.77 RL:8.37 RR:7.61
00:02:04.136 -> Δ 1.10 Took 20037 ms
00:02:04.136 -> After 20ms: RL:12.71 RR:11.55
00:02:04.136 -> Δ 1.10
00:02:04.136 -> ---------------------
00:02:04.497 -> eLSD Done: 302 ms after last
00:02:04.497 -> Start: FL:7.89 FR:9.90 RL:20.38 RR:16.84
00:02:04.497 -> Δ 1.21
00:02:04.497 -> Finish: FL:8.61 FR:10.97 RL:21.91 RR:19.92
00:02:04.497 -> Δ 1.10 Took 55072 ms
00:02:04.497 -> After 20ms: RL:25.91 RR:22.31
00:02:04.497 -> Δ 1.16
00:02:04.497 -> ---------------------
00:02:04.681 -> eLSD Done: 120 ms after last
00:02:04.681 -> Start: FL:9.91 FR:13.31 RL:25.40 RR:21.17
00:02:04.681 -> Δ 1.20
00:02:04.681 -> Finish: FL:10.88 FR:14.15 RL:21.51 RR:19.73
00:02:04.681 -> Δ 1.09 Took 56073 ms
00:02:04.681 -> After 20ms: RL:25.39 RR:22.67
00:02:04.681 -> Δ 1.12
00:02:04.681 -> ---------------------
<skipped part>
00:02:06.430 -> eLSD Done:76 ms after last
00:02:06.430 -> Start: FL:22.30 FR:29.26 RL:42.05 RR:34.75
00:02:06.430 -> Δ 1.21
00:02:06.430 -> Finish: FL:22.01 FR:29.43 RL:42.31 RR:38.76
00:02:06.430 -> Δ 1.09 Took 45055 ms
00:02:06.430 -> After 20ms: RL:43.17 RR:37.54
00:02:06.430 -> Δ 1.15
00:02:06.430 -> ---------------------
00:02:06.538 -> eLSD Done: 67 ms after last
00:02:06.538 -> Start: FL:21.37 FR:29.78 RL:44.67 RR:36.63
00:02:06.538 -> Δ 1.22
00:02:06.538 -> Finish: FL:21.78 FR:29.70 RL:38.46 RR:35.94
00:02:06.538 -> Δ 1.07 Took 43038 ms
00:02:06.574 -> After 20ms: RL:41.39 RR:41.09
00:02:06.574 -> Δ 1.01
00:02:06.574 -> ---------------------
00:02:07.883 -> eLSD Done:1246 ms after last
00:02:07.883 -> Start: FL:9.79 FR:19.67 RL:45.08 RR:37.26
00:02:07.883 -> Δ 1.21
00:02:07.883 -> Finish: FL:9.33 FR:19.26 RL:40.13 RR:37.16
00:02:07.883 -> Δ 1.08 Took 89115 ms
00:02:07.883 -> After 20ms: RL:40.36 RR:39.06
00:02:07.883 -> Δ 1.03
00:02:07.883 -> ---------------------
ECU is composed of high quality components, and built to last. Its only mechanical part is rated for 30,000,000+ mechanical cycles, effectively giving you 30 million+ slides before it is “allowed” to fail. That’s over 800 years if you set your car sideways 100 times per every single day.
Safety
eLSDtune was designed with safety as the top priority - for both the driver and the vehicle’s electro-mechanical systems.
The unit features multiple layers of protection at both hardware and software levels. It continuously performs self-diagnostics and monitors all inputs in real time, instantly halting operation if any irregularities are detected.
User has an ability to temporarily disable the unit manually at any time, so it becomes completely inactive, even in VSC OFF mode.
Unit disables itself at speeds above 80kmh (50mph) as an extra safety barrier
Factory ABS and VSC systems always retain absolute priority. Whenever activity from these systems is detected, eLSDtune instantly disengages, and remains inactive until normal conditions are restored. This way ABS/VSC operations are always executed in a native, factory intended way.
Important Disclaimer:
This unit is not certified for street legal use and is operated at the owner’s risk.
Please refer to your local rules and regulations.
The system has been carefully engineered and extensively road-tested, including top-speed Autobahn evaluations, confirming stable and predictable operation under demanding conditions.
However, as it has not undergone formal certification - it is intended primarily for off-street use.
Use at your own discretion and ensure compliance with local regulations.
Guides
Follow the video guide to get your eLSDtune module installed
How to use
System is designed to be very intuitive and easy to use, so there is not much you should know. Just set VSC OFF and floor it.
However, in case you need to turn off LSD, and temporarily disable eLSDtune module, while still having your VSC OFF - you can perform LSD Disable Procedure:
Quickly toggle between VSC OFF and ON- 5 times within 5 seconds.
Just make sure the dash indicator follows your command, since pressing VSC OFF button too quickly might confuse VSC ECU and make it ignore some of the presses.
LSD Disable/Enable Procedure
VSC
OFF
VSC
OFF
VSC
OFF
VSC
OFF
VSC
OFF
VSC
OFF
<= 5 sec
Successfull input will be confirmed by 3 audible clicks from eLSDtune unit.
LSD will be automatically re-enabled after restart of the car, or you can follow the same procedure to enable unit back manually
eLSDtune has on-board LED for status display
* I am very sorry, if you are color blind :(
FAQ
Does eLSDtune help with climbing slippery driveways and getting through low-traction surfaces like snow, ice, or mud?
Is it helpful on race track?
Is it safe really?
Does it fit other cars?
Does it replace factory VSC ECU?
Sometimes I can hear clicks when car starts moving. No wheel slip is occuring, so what is that?