Automatic Transmission Overhaul & Repair

We have over 60 years' experience of overhauling/remanufacturing, repairing and servicing Allison Transmissions both in the field and in our fully equipped workshop facilities.

Delivering the same quality as the original product

Mitchell Powersystems can provide you with an automatic transmission overhaul and repair solution that will help your transmission go even further. Our overhauls return your automatic transmission to like-new condition, delivering the same high standards of performance, service life and quality as the original new product. Putting your transmission back to work is a top priority and we provide a comprehensive service to assist that includes troubleshooting faults, removal, overhaul, or supply reman, to re-installation, and ongoing preventive maintenance for your automatic transmission.

Automatic Transmission Disassembly and Cleaning

Our rigorous overhaul process does more than repair and recondition your transmission, it fully returns it to original factory specifications thanks to our knowledge, expertise, and procedures based on over 60 years’ experience as the sole UK and Ireland distributor for Allison Transmission. Our automatic transmission overhaul process includes a complete disassembly, including paint and rust removal from all parts and components.

Our Service Engineers are factory trained and all transmissions are overhauled using only Genuine Allison Transmission Parts and fully Dyno Tested to Allison’s Test Specified Standards and also come with the added security of a 2 year warranty.

Automatic Transmission Re-Assembly

The automatic transmission reassembly process includes using remanufactured/rebuilt parts and components and new wear parts (gaskets, seals, bolts, screws, etc.). All new parts used are always Allison Genuine Parts™. Our in-process inspection and tests adhere to inspection plans, Allison specifications, including documentation of key dimensions throughout the re-assembly process.

Sectors we specialise in

From agriculture to marine, we have the knowledge and skillset to support your product, from an in-house overhaul to supplying genuine parts, to a roadside breakdown.

Agriculture

Mitchell group of companies have been supplying and supporting the agriculture industry for over 50 years which has made or expertise of agricultural engines invaluable to our clients. Specialist equipment OEMs rely on our industrial sales department to provide bespoke power and driveline solutions to their customers.

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Airport – Ground Support

When airports need to be kept moving, Mitchells has the power to deliver. We have many years of experience in delivering support to ground fleet operators. Being the first choice of axle, engine and transmission maintenance, we have the complete, in-house knowledge of the original equipment driveline solution.

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Airport ground support

Bus

Supporting public transportation, Mitchell Powersystems are proud to be working alongside the UK’s largest bus fleet operators. Providing on and off-site solutions through our extensive sales, parts and service networks.

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Construction

For many years Construction and Plant operators have relied on the ability of Mitchell Powersystems to deliver the highest levels of Product Support on a number of engines and transmissions utilised on equipment within the industry.

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Defence

Mitchell Powersystems and Turner & Co have a long-established relationship with the UK Ministry of Defence that spans over 40 year’s, supporting both infrastructure on overseas deployed operations and supplying products and services into specific Defence applications.

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Fire & Rescue

Mitchell Powersystems have supported the Fire and Rescue Services for many years, ensuring the reliability and availability of equipment. UK Brigades and Airport Rescue operators rely on our trained technicians and genuine parts in optimising vehicle uptime, with the assured speed and performance, in this exacting industry sector.

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Freightliner

Mitchell Powersystems (UK), are the Master Regional Parts Distribution and Technical Support Centre for Daimler Trucks North America, incorporating MTU, Detroit Diesel and Mercedes Benz On Highway Engines, Freightliner Trucks, Sterling Trucks, Western Star Trucks and Thomas Buses.

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Marine

As with the MTU/Detroit Diesel service centres, based at key locations in the UK, Mitchell Powersystems have now incorporated STEYR MOTORS into the marine division. We continue to be the driving force in keeping leisure, commercial, military and rescue vessels in service.

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Offshore

Mitchell Powersystems can provide solutions which enable diesel engines to operate in areas where explosive concentrations of gas vapour may exist, or where potentially explosive materials are handled. Core activities include flame/explosion protection for diesel engines supporting the on/offshore Oil & Gas industries.

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Ports & Distribution

Parts & Service support for Engine, Transmission, PTO, Axle, Differential and Transfer Case products fitted in – Forklift Trucks, terminal Tractors, Reach Stackers, Ro Ro Trucks.

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Power Generation

Generator sets are at the core of every on-site power source. With our range of G Drive engines supplied from world-leading manufacturers such as JCB Dieselmax and FPT (Iveco), we can provide you with an advanced power generation solution at reduced running costs.

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Refuse & Municipal

With environmental issues being at the forefront in both commercial and domestic minds, OEMs and operators know the value of keeping vehicles running as efficiently and reliably as possible. Over the years, Mitchell Powersystems have been at the heart of the Allison Transmission service, maintenance and re-manufacture within this specialised industry sector.

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Our partners

Mitchell Powersystems are proud to be dealers and distributors for some of the worlds leading manufacturers of premium brand products and have achieved official approval status with many significant customers in key market sectors.

FPT logo in red
Technical support

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