Hybrid & Electric
We can repair hybrid and electric vehicles.
All Manufacturers
We can repair all vehicle makes and models.
12 Month Warranty
On all transmission and gearbox repairs.
Collection & Delivery
Available nationwide
Specialists In All Makes Of Transmission Valve Body
Complete Valve Body Remanufacturing and Solenoid Testing
Every valve body is fully disassembled, cleaned, inspected and updated. Solenoids are tested and replaced where required, before each remanufactured unit is hydraulically and electronically tested.
The valve body is the hydraulic control centre of an automatic transmission, managing fluid pressure, gear selection and clutch operation. It contains regulator valves, switch valves, servo valves, springs and solenoids, all of which must operate correctly for smooth gearbox performance.
Checking the hydraulic integrity of the valve body is essential, as worn valves, pressure loss and damaged components can be the root cause of many automatic transmission faults.
Our remanufacturing process includes:
- Complete valve body disassembly
- Hydraulic circuit and spring testing
- Cleaning, repair and component updates
- Valve body reassembly
- Hydraulic and electronic testing
- Testing on specialist data acquisition equipment
Modern automatic transmissions use several types of solenoids, including on/off, variable bleed and linear solenoids. Each solenoid is stripped, ultrasonically cleaned, reassembled and individually tested, with results stored for future reference.
Since 2009, Beds Automatic Transmissions has developed specialist transmission repair solutions supplied throughout the UK and internationally, with our work featured in Transmission Digest and 911 & Porsche World.
Valve Body Testing
Specialists in All Makes of Automatic and Dual-Clutch Transmissions
Our advanced valve body testing equipment allows us to assess faulty valve bodies under different gear selections, pressures and operating conditions. In simple terms, the machines simulate how the transmission performs while the vehicle is being driven.
Using specialist test scripts developed by Mackie and Hydratest, the system sends commands to the valve body and records its hydraulic and electronic responses.
The results are displayed as a performance graph and compared with data from a new valve body of the same type.
This allows our technicians to accurately identify faults such as:
- Damaged or failing solenoids
- Worn regulator valves
- Faulty plungers or spool valves
- Hydraulic pressure loss
- Restricted or incorrect fluid flow
At Beds Automatic Transmissions, we use this specialist testing process to diagnose valve body faults across all makes of automatic and dual-clutch gearboxes. Accurate in-house testing helps us determine the correct repair and avoid unnecessary component replacement for customers across Bedfordshire and the surrounding areas.
Common Automatic Transmission Solenoid Problems
Transmission solenoids control the flow and pressure of gearbox fluid, making them essential for smooth gear changes and correct automatic transmission operation. Common solenoid faults include:
- Electrical failure: Open circuits, short circuits or weak electrical performance can prevent the solenoid from responding correctly. We compare the electrical signal with the hydraulic reaction to identify faults accurately.
- Debris contamination: Metallic particles and gearbox contamination can restrict fluid flow and cause slow or inconsistent solenoid operation. In our experience, this is one of the most common causes of solenoid failure.
- Worn valve seating: Wear can prevent the solenoid valve from sealing or closing fully, leading to pressure loss and poor gear changes.
- Internal seal failure: Damaged internal seals can reduce hydraulic control and affect transmission performance.
- Valve bore wear: Common in linear solenoids, bore wear can cause fluid leakage, pressure problems and inaccurate operation.
- Bushing faults: These are particularly associated with some Aisin linear solenoids and can affect movement and hydraulic response.
At Beds Automatic Transmissions, solenoids are cleaned, tested and assessed using specialist data acquisition equipment to accurately identify electrical and hydraulic faults.
