Current
Mechatronic unit repair and remanufacture
The mechatronic unit is the brain and the hydraulics of a modern automatic in one housing: valve body, solenoids, sensors and the control module. It’s also, on most modern gearboxes, the part that actually fails, while the gears and clutches are perfectly serviceable.
12 month warranty
When a modern automatic starts shifting harshly, flaring between gears, dropping into limp mode or refusing to select drive, the instinct is to assume the gearbox is finished. In the great majority of cases the mechanical side is fine and the problem is hydraulic or electrical: a leaking seal, a worn valve bore, a solenoid that no longer meters accurately, or a control module fault.
We remanufacture mechatronic units properly. The unit is stripped, every valve bore measured, worn bores sleeved or the valve body replaced, solenoids tested individually and replaced where they’re out of tolerance, seals renewed, and the assembled unit run on a test bench through its full pressure and duty-cycle range before it’s signed off.
Send it to us. You don’t need to bring the car
Remove the unit, pack it, and we’ll collect it anywhere in mainland UK. It comes back bench tested, coded to your VIN where required, with the adaptation procedure supplied and a warranty.
Units we remanufacture
| Manufacturer | Units |
|---|---|
| ZF | 6HP19, 6HP21, 6HP26, 6HP28 mechatronic; 8HP45, 8HP50, 8HP65, 8HP70, 8HP90 mechatronic |
| VW Group | DQ200 (0AM), DQ250 (02E), DQ381 (0GC), DQ500 (0BH), DL501 (0B5) |
| Mercedes-Benz | 722.6 conductor plate, 722.8 CVT, 722.9 VGS, 725.0 |
| Ford | 6R80, 10R80 solenoid body, PowerShift TCM |
| Aisin | TF-80SC solenoid pack, AWF8 valve body |
| Jatco / Nissan | CVT valve bodies and stepper motors |
| BMW | GS7D36SG DCT mechatronic |
Scroll the table sideways to see every column.
Common mechatronic faults
| Symptom | What’s usually behind it |
|---|---|
| Limp home, stuck in one gear | Solenoid failure, internal short, pressure loss |
| No drive in D or R | Pressure loss from the accumulator, or a sleeve or seal failure |
| Harsh, jolting shifts | Valve bore wear, solenoid drift, contaminated fluid |
| Flare between gears | Slow pressure response from a solenoid or the valve body |
| Delayed engagement from cold | Internal leakage, pressure bleeding down when parked |
| Intermittent warning lights | Sensor or wiring internal to the unit |
| Fluid leak at the electrical connector | Failed connector sleeve seal, very common on ZF |
Scroll the table sideways to see every column.
TCU cloning, coding and adaptation
Where a control module has failed, we can clone the original to a replacement so the unit retains its immobiliser and VIN data and drops straight in. Where a rebuilt unit needs setting up, adaptation is part of the job rather than an extra. A mechanically perfect rebuild will feel wrong on the road if the adaptations haven’t been reset and learned properly.
What you get back
- Remanufactured unit
- Coded to your VIN where required
- Adaptation procedure supplied
- 12-month warranty
What will it cost?
We price a mechatronic remanufacture once we know which unit you have and what it is doing. Send us the gearbox number and the symptoms and you will have an answer the same working day, with an indicative price wherever we can give one.
Frequently asked questions
How do I know it’s the mechatronic and not the gearbox?
Often you don’t until it’s read and pressure tested. Send us the codes and the symptoms and we’ll give you an honest view before you commit.
How long does it take?
Typically a few working days from receipt, plus carriage.
Do I need to be a garage to send one in?
No. Private customers and trade both welcome.
Can you supply an exchange unit instead?
For the common families, yes.
Related
How it works
Sending us a unit
You don’t need to bring the car. Most of what we do arrives on a pallet.
- Drain it. Couriers won’t take a unit full of oil, and it’ll leak.
- Crate or pallet it. A gearbox needs to be strapped to a pallet or in a stout crate. A cardboard box won’t survive.
- Label it. Put your name, telephone number and the vehicle inside the packaging as well as on it. Labels come off in transit.
- Tell us it’s coming. Send the enquiry form first so we know what to expect and can book it in.
We can arrange collection anywhere in mainland UK. Ask when you enquire.
What happens next
- 01You send the enquiry.
- 02We come back the same working day with an initial view and, where we can, an indicative price.
- 03If it needs looking at, we book it in or arrange collection.
- 04We strip and assess, then ring you with a firm price before any work goes ahead.
- 05Rebuilt, tested, returned, warranted for 12 months.
No work happens without your say-so, and there are no surprises on the invoice.
Same working day
Send us the number and what it’s doing
The gearbox number, the vehicle and the symptoms. That is usually enough for a straight answer, and photographs are welcome.