
Gearboxpreparation
A gearbox tuned case by case by our engine engineer, built around how you actually drive on road and track.
- Workshop in Signes (83)
- 700 m from the Paul Ricard circuit
- Bespoke tuning
Gearbox preparationbuilt around your car
Every gearbox we prepare starts from your car and the way you drive, never from a ready-made setting applied blindly.
- ▸ Bespoke gearbox mapping
- Our engine engineer tunes the gearbox case by case, never reusing a generic map.
- ▸ Road and track ready
- The work adapts to your real use, from open roads to track days.
- ▸ Engine and gearbox in tune
- Gearbox preparation is worked in step with your sports car's engine mapping.
- ▸ Next to Paul Ricard
- Our Signes workshop is 700 m from the circuit, at Le Castelet, in the Var.

A gearbox tunedcase by case
Gearbox preparation that starts from your car, not from a standard file.
Preparing a gearbox is about far more than loading a ready-made setting. At Bernis Factory, our engine engineer starts from your car, its engine and the way you use it, on the road as well as on track. The gearbox is mapped case by case, in step with the rest of the mechanics, to stay true to the character of your high-end sports car.
This bespoke logic shapes the whole workshop. We work on high-end sports cars, from Ferraris to BMW Ms, including Mercedes AMG, Porsche and Nissan GT-R, with the same standard: understanding the intended use before touching a single setting. The goal is for the gearbox to follow your engine precisely, with no rough compromise.
Preparation built for the Paul Ricard circuit
A large part of our work revolves around the track. Our workshop is located 700 metres from the Paul Ricard circuit at Le Castelet, which lets us support owners before, during and after a track day. We are an official BMW M France partner for track support and recommended by ORECA, and our team has a recovery truck to step in directly on site. A well-prepared gearbox truly shows its worth on a demanding track day.
Gearbox preparation in Signes and around Le Castelet
Bernis Factory is located at 26 Allée de Dublin in Signes, in the Var. This closeness to the Paul Ricard circuit shapes our business and the way we work on high-end sports cars. Whether you drive on the road, on track or both, you will find here a team able to prepare your gearbox in step with the rest of your mechanics, within a workshop that covers three trades: maintenance, preparation and restoration.
Frequently asked questions about gearbox preparation
What does your gearbox preparation involve?
We tune the gearbox case by case, starting from your car and how you use it. Our engine engineer maps the gearbox in step with the engine, rather than applying a generic setting.
Which cars do you prepare?
We work on high-end sports cars such as Ferrari, BMW M, Mercedes AMG, Porsche or Nissan GT-R, for both road and track use.
Do you give a price for preparing a gearbox?
Every preparation is bespoke and depends on your car and its intended use. The simplest step is to contact us so we can study your project and give a suitable estimate.
Do you prepare gearboxes for the Paul Ricard circuit?
Yes. Our workshop is 700 metres from the circuit at Le Castelet. We support owners before, during and after a track day, and are an official BMW M France partner for track support.
Is the gearbox prepared together with the engine?
Yes. We tune the gearbox mapping in step with the engine, so the whole setup stays consistent and true to the character of your sports car.
Where is my gearbox preparation carried out?
In our workshop at 26 Allée de Dublin in Signes (83), right next to the Paul Ricard circuit and Le Castelet, in the Var.
A workshop dedicated to gearbox preparation
Finding a workshop that treats gearbox preparation as bespoke work is rare. Many settle for standard settings, when every high-end sports car has its own requirements. Bernis Factory covers these subjects from its Signes workshop, with the eye of an engine engineer used to mapping engine and gearbox case by case rather than applying ready-made files.
Our gearbox work is part of a complete approach to the car: maintenance, preparation and restoration of high-end sports cars. This page is also a gateway to our other services and our work, to move from a simple idea to a concrete project around the Paul Ricard circuit, at Le Castelet, in the Var.
Let's talk about your gearbox project
A gearbox to tune, a question about engine-gearbox consistency on your sports car or a track project? Tell us about your car and we will work out the next steps together.
A project,
a call.
Tell us about your car and how you use it. We'll figure out the right service together — maintenance, engine tuning, chassis, restoration.
83870 Signes
Across from the Paul Ricard circuit
Monday — Friday · 9:30 — 18:00
By appointment only