Description

Transform Your SST: Faster Shifts, Stronger Pull, Less Gear Skips, Zero Hassle

Firmware software upgrade for OEM Mitsubishi TC‑SST (DCT470) – Update to this Highest and Latest OEM TCU Firmware from Mitsubishi.

Bring out the best in your factory SST transmission with a proven software upgrade based on Mitsubishi’s highest B151 calibration—calibration tables enhanced by EvoScan. Expect crisper, quicker shifts, more acceleration during the shift event, and smarter gear logic in every mode. No engine retune required.

Who It’s For (Compatibility)

2008+ Mitsubishi models equipped with the DCT470 TC‑SST:

• Lancer Evolution X / Evo 10 (SST) – a.k.a. Evo X MR in the USA
• Lancer Ralliart (SST) – all years with SST
• Lancer Sportback 2.0L (SST)

All of the above share the same SST hardware—so you get one optimized software foundation across models.

Why Drivers Love It (Key Benefits)

• Faster, crisper upshifts & downshifts for a more connected, performance feel.
• More acceleration during shifts—gain time exactly where dual‑clutch boxes shine.
• Rolling Super Sport (S‑Sport) Mode – engage S‑Sport instantly at any speed.
• Higher commanded clutch pressure options to reduce slip and wear.
• Smarter shift points in Normal, Sport, and S‑Sport (with ShiftMods option).
• Ralliart bonus: Built‑in S‑Sport mode + Rev‑Hunt fix.
• Launch Control boost build—up to ~19+ psi with ShiftMods/LC option.
• Plays nicely with your current tune (incl. Tephra X Mod). No ECU retune needed.

“Going from Sport to S‑Sport, then to this, is like an entirely new transmission.” – Customer review

What You Get (Included)

• SST Firmware B151‑based SST upgrade (one license per vehicle).
• Multiple ROM/CFF options with different clutch‑pressure maps so you can choose your feel.
• Video + PDF walkthroughs to install PassThruCAN and flash safely at home.
• Friendly help from EvoScan Support if you get stuck (Messenger/Email).
• Stock CFF provided so you can revert to factory at any time.

Optional:

• ShiftMods Pack – revised upshift/downshift points, earlier rev‑match downshifts, Launch‑Control enhancements, Rolling S‑Sport, and more.
• SST Tuning Guide (20+ chapters) – proven tips for high‑HP builds and aftermarket clutches.

How It Works (Simple Requirements)

• Windows 10/11 laptop/PC
• Openport 2.0 cable
• Purchase on this page (enter your VIN) → we email your files and instructions instantly on purchase.

Flashing takes about 5 minutes with Included PassThruCAN software (The flashing software written by Mitsubishi themselves so you know its reliable). in saying that, even so, its common practice that if a flash is interrupted, don’t touch the car key, simply flash again. Ensure you don’t touch the key, Leave the vehicle key ON (but not started), and flash again, it will continue as normal and will exit programming mode on its own once it is finished.

Safety & Reliability

• Built on Mitsubishi’s latest B151 logic (adds safety behavior with brake‑pedal press).
• Uses factory‑style flashing via PassThruCAN—robust and proven.
• If a flash is interrupted, simply flash again. Important: Ensure you don’t touch the key, Leave the vehicle key ON(but not started), and flash again.
• Revert anytime with the provided stock CFF.

We have not had incidents of “stuck” ECUs; if something goes sideways, you re‑flash and go.

We have heard of the occasional U1203 or P1590 dtc codes after flashing, but thats just transientary – go into evoscan and click clear dtc, also use mmc coding writer v2.3 to set SST  software market to JDM-DOM/EU-EUR/US-NAM, and as rare as this is, just pull fuse 3 to reset all codes for the A/T SST transmission ecu, this will clear out any remaining issues that occur with clearing out codes.

Details for Enthusiasts

• Clutch‑pressure packs included (example set): -10, -7, -5, -3, 0 (OEM), +3, +5, +7, +8, +9, +10, +11, +12, +15%.
• If you buy the V4 Upgrade Pack you get clutch-pressure options  ANY Clutch % to choose from 0 (OEM) +1, +2, +3.. +99%, and any negative clutch pressure you like for those of you who have tightly packed sportsman and heavy duty clutch plates steels and you need to button off the clutch pressures quite a bit into like Negative 3% is quite common.
• Works with Tephra X Mod, Rax Patch fast logging, spark‑cut patch, and torque reporting tables.
• Compatible with aftermarket clutch packs (for 500+ HP builds, start with 0% or +7% maps and fine‑tune using the guide).
• recommend EvoScan v3.0 with built‑in SST Teach‑In Calibration included.
• Shift Mods V3 holds gears longer before auto upshift (per mode), improves rev‑match downshifts, and enhances LC boost build.
• Shift Mods V4  New V4 Preferences for Auto Shift Normal/Sport/SSport modes. Reduces Clunking on downshifts,  Reduces Skipped Gears, Works better on older SST boxes by reducing shift point stress with more accurate shift placement. Give it a try, you can always set shift points back to stock and still have the other features above.

Pricing

• $37 USD – Modified CFF SST TCU ROM (licensed per VIN) includes free PassThruCAN Easy Auto installer by EvoScan.
• + $20 USD (optional) – SST Engine/TCU Tuning Guide v1.6 (20+ chapters)
• + $20 USD (optional) – More Clutch Pressure options up to 15% Extra Clutch Pressure or +$25 for All Percentages
• + $27 USD (optional) –  Shift Mods V3 or +$47 SST Shift Mods V4 shift points SST Firmware Generator

Have multiple cars? Purchase one license per VIN.

Delivery

• Files are emailed automatically instantly after purchase.
• Retrieve your files at any time in the future under the EvoScan top Account menu -> Downloads
• If you haven’t received your SST TCU files within 48 hours, message hamish.ahern on the sst owners facebook group and we’ll sort it.

Frequently Asked Questions

Do I need an engine retune?
No. This upgrade does not alter your engine ECU tune. It focuses only on the SST TCU firmware.

Is it safe?
Yes. We use factory‑style tools and factory oem firmware with calibration table adjustments. You can always revert to stock using the supplied CFF.

My car is skipping gears, will this firmware update fix this?
No I wouldn’t have thought so, but we did hear from a one customer that their gear skipping went away immediately after Appling the V4 firmware update.  So to save yourself a $5k SST rebuild its definitely highly recommended to purchase this.

Can Ralliart run B151?
Yes. We upgrade Ralliart users to B151 and include a Rev Hunt fix and S‑Sport mode.

I have an EvoX what will the Ralliart rev hunt fix do?
Just tick it anyway, it does no harm, I have an EvoX and run the rev hunt fix as well, it has no effect on EvoX, it fixes Ralliart rev  hunt.

What Clutch Pressure should I run if I have an OEM clutch pack?
I would recommend Plus +8% to start, and if you get too many clunks when coming to stop, then back off the % a bit, and go back 1% at a time, until its smooth at coming to a stop without clunks.

What Clutch Pressure should I run if I have an Sportsman or stronger multi-plate aftermarket clutch pack?
I would recommend Minus 3% to start (thats why we added -3% and other negative pressures)  you need more slip when using more clutch plates. you will have full grip anyway, and you need it to be smooth and strong – not just strong and clunky.

Should I do a Teach-in after doing this firmware flash update?
I would NOT recommend doing a teach in – why? because the sst learns over many hundreds of drive circles the clutch trims, so in doing a teachin resets all the learned values,
therefore ONLY do a teach on these occasions:
– only TEACHIN if the car has a lot clunks or skipping gears.
– only TEACHIN if the sst has had a rebuild.
– only TEACHIN if the sst has not had a teachin for many years (3+), and its time a for a re-calibration.

Remote e‑tuning?

We’re focused on software. For remote e‑tuning, consider reputable specialists (e.g., Chet Rickerman, Chag Tuned, Jeff Evans).

Launch control boost?
With the ShiftMods/LC option, customers report ~19+ psi built before launch while retaining stock rev limiter behavior (no spark cut required).

Real‑World Feedback (From Our Customers)

1. “Best money ever spent. It shifts so quick now in all modes.”
2. “Perfect with my E85 setup—no more gear slip and stronger hold.”
3. “Love this update—worth every dollar. Switching to +10% next.”
4. “Superb. Fast gear changes and firmer clutches. Launch control finally hooks.”

Ready to Feel the Difference?

Add to Cart, enter your VIN, and we’ll send your tailored upgrade with step‑by‑step instructions. Flash at home in minutes—drive away with a sharper, stronger SST.

Notes & Disclaimer

• Maintain your SST with OEM SSTF‑1 or compatible DCT fluids (e.g., Castrol Transmax, Penrite DCT).
• Increased pressures remain within system limits; nonetheless, any motorsport or high‑HP use is at your discretion.
• Limitless Designs Ltd liability is limited to the purchase price of the software.
• Questions? Message Hamish.Ahern (EvoScan) on Facebook SST Owners group.