The Mitsubishi Lancer Evolution X SST and Ralliart SST both feature the Getrag DCT470 SST Gearbox, the Getrag design is incredible, in a nutshell the design is based around two input shafts (one inside the other) that each spline their own clutch drive hubs. The method behind the design allows the shift forks to select both an odd and even gear which leads to incredibly quick gear changes, the perfect solution for a performance car. The concept was adopted by Audi and Porsche in the mid-80's for use in their motorsport operations, today, Getrag refer to this design as their 'Powershift Transmission'.
The impressive yet complex design of the gearbox has resulted in limited specialist support being available in the UK, but don't worry, you've come to the right place, Indigo-GT is the UK's ONLY Dodson Motorsport Pro-Dealer specialising in their entire range of products and services for the Getrag gearbox. Additionally we offer dealer level and beyond diagnostics, servicing, repairs and complete gearbox rebuilds. We have our own MUTIII Diagnostic Tool and cater for Gearbox Software Updates and complete Clutch Pack Re-Teach Procedures.
If you've experienced any of the following, we can help;
- Intermittent clutch slip
- Slow gear changes
- Grinding sound from the gearbox
- Inability to select certain gears
Over the many years we've been rebuilding these gearboxes, we've found that issues caught and resolved early on can mean the difference between a repair bill of a few hundred pounds and a few thousand pounds, you'll find a full break down of the services we offer on this page, please contact us for a model specific estimate.
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SST GEARBOX RE-TEACH
The nature of the SST Gearbox means that over time the clutch plates wear, eventually they have to be replaced entirely but before that point, this wear causes the height of the clutch pack to change ever so slightly. The gearbox, being the finely tuned piece of engineering that it is relies upon a number of sensor within the gearbox that soon find themselves working outside of their configured range as the height of the clutch pack changes, this usually leads to slow and inefficient gear changes, a far cry from how the gearbox was initially designed to operate.
In many circumstances, a Re-Teach using our MUTIII Diagnostic Tool can cure this, this takes approximately two hours to complete.
SST GEARBOX OIL & EXTERNAL FILTER CHANGE
Maintenance is key to ensuring the SST Gearbox is in peak condition, Mitsubishi have a relatively high maintenance interval for the SST Gearbox set at 70k miles, we strongly recommend following the maintenance interval as used by the previous generation of Evo which recommends replacing the transmission fluid at 18k miles (or two years).
This service uses eight litres of fluid (Castrol Transmax DCT Fluid) and an external filter.
SST GEARBOX REBUILD
Over time the SST Clutch Plates wear, this is entirely normal, eventually the Clutch Plates will have to be replaced, early symptoms of this include clutch slip and inefficient gear changes. It's important to address this issue early on as extreme clutch slip can easily lead to additional and severe damage (sometimes irreparable) being done to the rest of the components within the gearbox.
We have a number of Rebuild Packages available for a range of budgets and requirements, all our packages include labour, new gearbox seals, filters and fluid, a normal gearbox rebuild takes 1-2 weeks to complete, this includes testing.
Some of the issues referred to above cannot be cured by a re-teach or oil change alone, in such circumstance, more persistent issues may require a complete gearbox rebuild, our entry level rebuild (suitable for cars running up to 400lbft) includes the following;
- Labour - Remove & Refit Gearbox
- Labour - Strip Down and Clean Gearbox
- Replacement Internal Magnetic Filter and External Filter
- Castrol Transmax DCT Fluid
- Fuchs Silkolene ATF
- Power Steering Fluid
- MUTIII Gearbox Re-Teach
- Four Wheel Alignment
This is a much more cost effective solution than replacing the gearbox (which cost approx. £11k from Mitsubishi) and rules out the inherent level of risk in purchasing a second hand gearbox.
For cars that are running more than 400lbft or are going to see some heavy track action then we'd look to upgrade the clutch pack with Dodson Clutch Kits, there are three types available with different ratings;
Option 1 - IGT-R Dodson Super Stock Rebuild Package
This package is based around the Dodson Motorsport Super Stock Clutch Plates (rated up to 450lbft), if your car has been remapped above 400lbft or your simply looking for a little extra headroom for a Stage 2 power car.
Option 2 - IGT-R Dodson Clubman Rebuild Package
The Dodson Clubman Package utilises the heavy duty Exedy Plates (as used by the Super Stock Package) with the addition of two heavy duty, high tensile alloy clamping plates resulting in this package being rated up to 500lbft.
Option 3 - IGT-R Dodson Sportsman Rebuild Package
The Dodson Sportsman Package is the final word when it comes to the capability of the SST Gearbox, rated up to 600lbft, this incredible feat of engineering features a Heavy Duty Billet Steel Clutch Basket, Heavy Duty Exedy Plates, High Tensile Alloy Clamping Plates and High Tensile Alloy Pistons with High Temperature Seals, this is a serious level of kit that has required extensive development, engineering and manufacturing.
Dodson Shift Fork 4 Replacement
It's incredibly common for Shift Fork 4 to develop a fault which results in the loss of the even gears, to rectify this fault the standard sensor has to be replaced, this requires the remove of stripping down of the gearbox to be able to access the sensor, it's a worthwhile upgrade if you're having the gearbox rebuilt as it requires just a little extra labour to fit the sensor.
Mechatronic Unit Refurbishment
If the gearbox is being rebuilt, we strongly recommend having the Mechatronic Unit refurbished at the same time, this unit contains a number of solenoids that can become contaminated with particles from the wearing friction plates that leads to gearbox pressure issues, refurbishing the Mechatronic Unit involves stripping the assembly down and passing the solenoids through an ultrasonic cleaner.
Indigo-GT Gearbox Repair/Rebuild Warranty
We believe it's vitally important to stand behind our work, all our re-build packages include a six months or 5,000 miles (whichever comes first) limited warranty against labour and any new parts (excluding consumables items) that have been supplied and fitted by Indigo-GT Performance Ltd. In addition to this, we offer a 12 months or 10,000 miles (whichever comes first) limited warranty against any new parts (excluding consumable items) that have been supplied and fitted by Indigo-GT Performance Ltd. This Warranty does not not include any associated transport costs in returning your vehicle to us.
Our Warranty shall only be applicable on vehicles that are operating a standard ECU tune (ie have not been remapped) or have been remapped exclusively by Indigo-GT Performance Ltd with the engine power and torque levels within the design specification of the chosen IGT-R Rebuild Package, in addition to this any gearboxes that have previously failed due to being filled with incorrect gear oils (such as ATF Fluid) will not be covered by warranty due to the extensive damage that can be caused. This does not effect your statutory rights
Common Fault Codes For SST Issues
P1828: Shift fork position sensor 2 system (Neutral) P1829: Shift fork position sensor 2 system (Poor performance) P182A: Shift fork position sensor 3 system (Voltage low range out) P182B: Shift fork position sensor 3 system (Voltage high range out) P182C: Shift fork position sensor 3 system (Output range out) P182D: Shift fork position sensor 3 system (Neutral) P182E: Shift fork position sensor 3 system (Poor performance) P1831: Shift fork position sensor 4 system (Voltage low range out) P1832: Shift fork position sensor 4 system (Voltage high range out) P1833: Shift fork position sensor 4 system (Output range out) P1834: Shift fork position sensor 4 system (Neutral) P1835: Shift fork position sensor 4 system (Poor performance) P1836: Shift fork 1 malfunction P183D: Shift fork 2 malfunction P1844: Shift fork 3 malfunction P184B: Shift fork 4 malfunction P1852: Shift fork 1 or 2 opposite direction movement P1855: Shift fork 3 or 4 opposite direction movement P1857: Odd number gear axle interlock P1858: Even number gear axle interlock P1859: Disengagement too late with clutch 1 P185A: Engagement too late with clutch 1 P185B: Disengagement too late with clutch 2 P185C: Engagement too late with clutch 2 P185D: Clutch open not possible P1862: High side 1 system (Overcurrent) P1863: High side 1 system (Open circuit) P1864: High side 1 system (Short to power supply) P1866: High side 2 system (Overcurrent) P1867: High side 2 system (Open circuit) P1868: High side 2 system (Short to power supply) P186A: High side 3 system (Overcurrent) P186B: High side 3 system (Open circuit) P186C: High side 3 system (Short to power supply) P186D: High side 1 system (Voltage low range out) P186E: High side 2 system (Voltage low range out) P186F: High side 3 system (Voltage low range out) P1870: Engine torque signal abnormality P1871: APS system (Signal abnormality) P1872: Between shift lever and TC-SST system (Q-A function abnormality) P1873: Clutch 1 system (Pressure abnormality) P1874: Clutch 2 system (Pressure abnormality) P1875: Damper speed sensor system (Poor performance) P1876: Gear block 1st P1877: Gear block 2nd P1878: Gear block 3rd P1879: Gear block 4th P187A: Gear block 5th P187B: Gear block 6th P187C: Gear block reverse P1880: EOL Mode Active P1881: Twin clutch SST control mode switch system (Malfunction)