RRT RRT

Road and Race Transmissions

Limited-Slip Differential Experts
Drivetrain Engineering
Additive Manufacturing

01

Hello we are, RRT

Advanced Engineering

Road & Race Transmissions is a specialist engineering company that repairs manual transmissions, axles and differentials. In addition to repairing standard transmissions we also fit up-rated parts such as LSDs, gearkits, and final drive ratios.

We are a drivetrain engineering company that specializes in the supply and fitting of performance Limited-Slip Differentials, and other drivetrain parts. By only supplying the highest quality manufacturers, we allow our customers to have the best performing vehicles on the road or the race track. Our services also include the design and manufacture of custom parts for the drivetrain industry.

We supply only the best from a chosen range of manufacturers, Cusco, Drexler, Titan, Wavetrac, Kaaz and Quaife. Being truly independent, we can recommend what is the best for your car, and to give you the edge against the rest.

Our workshop is equipped to handle final drive ratio changes, gear kit upgrades, and general maintenance on gearboxes and axles. Keeping a wide variety of bearings, seals and synchros in stock, we can repair H-pattern manuals and sequentials without delays.

We can design and manufacture a range of things for all industries, not just the motorsport sector. Our services include CAD Design, and 3D printing. Our in-house 3D printing material is a carbon fibre composite, which has the ability to be reinforced with fibreglass, giving the strength of steel and aluminum. We can also offer metal 3D printing if needed.

25

YEARS OF
EXPERIENCE

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Our Store

Check out differential upgrades, transmission parts, bearing kits, oils, and other performance parts from our online store. We offer competitive prices, and international shipping on all of our products.

Our Services

• Limited-Slip Differential Supply

Our range of LSDs is some of the largest available in the world, and from the top manufacturers. We provide the highest quality, and best performing parts available for your vehicle. Our service includes custom set-up of differentials where available, so you get a bespoke part for your car. 


We can offer unbiased advice on what is most suitable for your vehicle because we aren’t tied to one brand, and you never get an off the shelf, one size fits all recommendation. Our depth of knowledge helps you find the best solution for your car. 


Along with supplying differentials for you to fit independently, we also offer in house fitting services to the gearbox or differential. We also work with local garages for a drive in & drive out service. 

• Customisable Differentials

Our custom set-up involves taking apart the LSDs and adjusting the number of friction plates, the preload, and the ramp angles.


This gives us the ability to precisely control how the LSD works in the vehicle. Due to variations such as power, weight, tyres, and type of use, custom set-up will help get the absolute best out of the vehicle, and will aid in shaving down lap times.


This service is an option with all plated LSDs, and is provided free of charge when purchasing and fitting an LSD with us. We also offer this service to LSDs not supplied by us, and to LSDs made by manufacturers we don’t stock. 


We don’t just offer this service to Limited-Slip Differentials we supply, we can also alter your existing differential so you get the benefits without having to purchase a new LSD. This has been taken advantage of by everyone from road car users, to GT teams and even BMW UK. 

• Gearbox Repair

We carry out repairs for manual gearboxes, whilst we focus on high performance vehicles, we also carry out repairs to standard road vehicles with a number of main dealers outsourcing their repairs to us.
We carry bearings, seals and spare parts for most common gearboxes allowing for a fast repair. We only use the highest quality bearings & seals sourced from reputable manufacturers in the UK, USA, Germany & Japan.
Our spare parts are manufactured by the OEM, or if unavailable, to standards meeting or exceeding that of the OEM.

• Axle & Differential Repair

Axles and differentials require highly specialised knowledge and tools to repair, we have both. To correctly set-up a differential the correct amount of pinion preload must be set, the correct amount of backlash, and then finally the tooth contact patch must be checked.
Ensuring all these are correct prolongs the life of the differential, and reduces noise from the differential. We only use the highest quality bearings & seals sourced from reputable manufacturers in the UK, USA, Germany & Japan. Our spare parts are manufactured by the OEM, or if unavailable, to standards meeting or exceeding that of the OEM.

• Aftermarket Upgrades

In addition to supplying a huge selection of LSDs, we also offer final drive ratio upgrades, close ratio gear kit upgrades, and the supply of sequential gearboxes. 


When recommending upgrades, we take into consideration the characteristics of the engine, and motorsport disciplines the car is used in, and various other influencing factors. The suitability of all upgrades is discussed, and you are fully informed of the upsides, and potential downsides of making a change to the gearing. 

 

We have a wealth of information, and various tools to assess the best option for you. One of these tools is our gear calculator, which we have now made freely available for you to try out.

• Gear Calculation

Our free to use tool was developed after years of on track testing found that even professional drivers were constantly changing gear at the wrong RPMs, close ratio gear kits seemed to slow drivers down, and more gears does not necessarily mean faster lap times. 

 

What we found was far more important was matching gear kits to the torque curve of an engine, and then working out exactly what RPM was the best to change gear. We developed a tool to do exactly that. After seeing the advantages it gave our customers, it was released to the public so everyone can drive their best.

• 3D Printing

We offer in house 3D printing from our workshop in Kent / South East London. We print exclusively in a Carbon Fibre composite, which can be reinforced with bands of fibreglass. This gives us extremely light, high strength parts with no comprise. Our pricing is highly competitive, and makes for a low cost rapid prototyping service, or for end use parts. 

 

We have designed and printed a number of parts used on classic cars, or custom vehicles that are no longer available from the manufacturer. Anything from bracketry, to a simple cap can be recreated in strengths to rival that of steel or aluminium.

• CAD design

 

 

To compliment our 3D printing service, we offer in house CAD design, where we can create a custom part, or recreate an original part that is no longer available. Our design process is highly transparent, and you are consulted along every step of the way to ensure you get exactly what you need.

• Consultancy

Consultancy services are available for diagnosing transmission problems in pre & post production vehicles, and to assist in gearbox and limited-slip differential design.

 

We can diagnose drivetrain noise, vibrations, reverberations, and the cause of component failure in production vehicles, and assist the manufacturer in rectifying issues. This is mainly done via an initial description of the issue, road tests and then disassembling the gearbox and / or axle. Once we find the source of the issue we also advise on how it can be rectified. A number of vehicle manufacturers including Ford & Suzuki have used this service.

 

We can diagnose drivetrain noise, vibrations, reverberations, and the cause of component failure in production vehicles, and assist the manufacturer in rectifying issues. This is mainly done via an initial description of the issue, road tests and then disassembling the gearbox and / or axle. Once we find the source of the issue we also advise on how it can be rectified. A number of vehicle manufacturers have used us for this service.

 

We do also offer other drivetrain consultancy services, please enquire.

RRT

Additive Manufacturing

We offer an additive manufacturing service that goes from CAD design to a physical product with a rapid turnaround time.

Using our engineering grade 3D printer, and state of the art software, we can help your ideas become reality. We print exclusively in a carbon-fibre composite, and can offer internal reinforcement, and a number of external coatings so all your design needs can be met.

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