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Product Code: 1219G
Castrol Transmax Manual Transaxle 75W-90 is a fully synthetic manual transmission fluid engineered to meet the complex demands of modern transaxles. A full synthetic transaxle fluid designed to provide enhanced EP performance compared with a conventional GL-4 fluid, Transmax 75W-90 is recommended for use in many vehicles from leading manufacturers.
This premium-grade oil delivers excellent synchroniser performance, thermal stability, and protection across a broad range of temperatures. It has been co-engineered with leading vehicle manufacturers to provide smoother shifting in colder conditions and strong wear protection under high load, making it a trusted solution for both everyday driving and more severe operating conditions.
Designed for use in manual transmissions and transaxles where API GL-4 performance is required, Castrol Transmax Manual Transaxle 75W-90 is especially well-suited to vehicles requiring high-performance synchroniser function. Its low-temperature fluidity helps reduce shift effort during cold starts, while its high film strength offers lasting protection to gear components under load. These qualities make it a strong choice for modern passenger cars, light commercials, and high-torque applications with front-wheel-drive layouts.
With excellent high shear stability, this fluid resists viscosity breakdown even under severe stress, maintaining optimum gear protection and lubricant performance throughout extended service intervals. Its oxidative stability reduces the build-up of deposits, ensuring clean transmission internals and reliable long-term performance.
For workshops, fleet operators, and individual vehicle owners seeking a fluid that combines manufacturer-tested compatibility with synthetic durability, Castrol Transmax Manual Transaxle 75W-90 offers both peace of mind and operational efficiency. By enabling temperature reduction in operation, Transmax Manual Transaxle 75W-90 extends oil and component life and aids fuel efficiency, emissions reduction and transmission cleanliness. To enhance drivetrain reliability and performance, explore our related gear oil and driveline fluid categories, or pair this product with Castrol’s engine oils for a comprehensive solution.
Broughton Lubricants has over 100 years' experience in supplying lubricants, and is the UK's only Castrol Ambassador Distributor for both the industrial and automotive product lines. However, our approach is about more than just supplying Castrol products. We aim to be a technical partner for our customers, by offering advice, insight and support.
The lubricant market changes regularly, and it can be difficult to find the right product. This is a particular problem when products are discontinued, upgraded, rebranded or otherwise removed from the market. Thanks to our longevity, we can help you to find a direct replacement where one exists, or advise you on choosing a suitable replacement based on your technical specifications and performance criteria. Whether your priority is extending oil and component life compared with a conventional fluid, delivering excellent transmission cleanliness, prolonging protection and extending drain intervals, or driving higher performance without losing enhanced EP performance, we can help. Call us for expert recommendations based on your technical requirements or for guidance on finding a suitable product where the manufacturer's recommended lubricant is no longer available.
If you want extra support to optimise operational efficiency, our oil testing service provides detailed insights into lubricant condition and performance over time. Whatever you want to achieve in terms of performance, longevity or protection, Broughton Lubricants is here to help. Call our team of technical experts on 03300 555 109 or use our online enquiry form to request a call back and find out more about how we can help.