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Technical / Sale Enquiry Form

Please complete the form below:

Name:
Tel/Cell:
Email:
City:
Make:
Model:
Engine Type:
Transmission Type:
Enquiry:
Are you able to get your vehicle to one of our branches nationwide, for a free diagnostic service?

Or will you prefer to purchase a loose gearbox?

Would you prefer to buy another gearbox, or do you have time to send yours in for repair?

Which warranty would you require?

Would you be able to get your old failed gearbox back to us (At your own cost)?

Who would you use to remove and fit your gearbox?

Can you provide us with an engine code and/or gearbox code (You may have to ask a technical person for these details)?

Great! Please visit any of our branches for a free diagnostic test while you wait.
If you cant make a trip right away and would like to know more about what the job might cost, or how long it will take, please answer the questions below:

Would you prefer to buy another gearbox, or do you have time to repair your gearbox and possibly save money?

Which warranty would you require?

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Mayfair Gearbox's 23 Years In Business

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What Is A Dyno And How It Works?

There comes a time when everyone needs to take their gearbox in for repairs. You’ve probably heard that your engine and related parts will be rigorously tested on a dyno. You have probably pretended like you knew exactly what that meant and hoped the people who took your car keys from you knew what they were doing. Well after reading this article, the next time you take your car in for diff and gearbox repairs you’ll be able to at least make sense of what the experts are saying to you.


What is a dyno?
Dyno stands for dynamometer and is a machine that is used to measure the torque or the power produced by an engine or motor or any rotating prime mover. With regards to a vehicle, they are used to simulate the conditions an engine or gearbox may encounter, and evaluate shift timing and shift field of the transmission at different speeds.


There are various types of dynos that serve very specific purposes. The one that’ll most probably be used to test your car would be a water-brake dyno. Your car’s engine’s crankshaft or flywheel is hooked up to the dyno and when it is accelerated, what is known as a power absorption unit, begins measuring the torque of your vehicle. The absorption unit is made up of a rotational element or rotor and a stationary housing or stator. Torque is measured through the conflicting force created when the rotor starts spinning, as it spins the stator also wants to spin, this is prevented by a strain gauge. This strain is measured as torque. Horsepower is consequently calculated from the collected torque data.


What is a dyno used for?
The water-brake dyno uses water to provide the load but different dynos use different methods to produce desired loads. Eddy-current dynos use electric current that is created by rotating an element to create an electromagnetic field. Due to this you have very precise load control. What do they mean by load? Well when your car or truck is out on the road there are several factors putting strain on your engine. The chassis may take strain, the gearbox, the engine, and so on, a dynos job is basically to put a certain level of strain on the machine before it hits the road.
Other than being used to test torque a dyno can test a variety of other factors with regards to engine development activities.


Trusted gearbox testing
If you are looking for reliable diff and gearbox repairs and testing and you live within South Africa, the best option for you is Mayfair Gearbox centre. They have branches all over South Africa and they use only the best dyno technology to simulate in-vehicle conditions. They test not only an individual’s car, but entire fleets of trucks. They have a combined experience of over 100 years and have been awarded the AA Quality Assured Certificate of Good Service. They are well known for their hospitality, so now that you know what a dyno is, don’t be afraid to ask more questions the next time you get your gearbox repaired.

Quick Facts

Who We Are

Mayfair Gearbox is a National and International supplier of fleet reman gearboxes, diffs and propshafts. We are led by a Management Team of true industry professionals who have pioneered the gearbox remanufacturing industry. Mayfair Gearbox has been established for 20 years in the Industry.

What We Do

Mayfair Gearbox is the solution to limit your fleet’s downtime! We are quality driven to provide only the finest remanufactured gearboxes, diffs and propshafts.

What Makes Us The Best

Commitment and integrity to provide outstanding quality, exceptional service and support at all times, to you our valued Customer. Approved by most manufacturers and a National Footprint of 14 Branches.


Product Division

Heavy Commercial & Buses
Truck Gearbox Repairs Bus Gearbox Repairs
Earthmoving 4 x 4
Earthmoving Gearbox Repairs 4X4 Gearbox Repairs
Passenger Manual Passenger Automatic
Manual Gearbox Repairs Automatic Gearbox Repairs


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Remanufacturing = Sustainability + Efficiency

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