RCM Subaru Manual Transmission Service Kit

RCM is proud to offer the ultimate transmission service solution for your Subaru, bringing together the highest-quality products to ensure unmatched performance and protection. By working with Castrol, we’ve developed premium gear oils specifically tailored for Subaru manual gearboxes and rear differentials. With Castrol’s advanced formula, our gear oils deliver superior protection, reduce wear, and ensure smooth, reliable shifting under all conditions. 

In addition to our specialized gear oils, our complete service kit includes the OE Subaru gearbox drain washer, a highly absorbent FibreKing cloth and Wurth brake cleaner, so you can handle maintenance with ease and precision. The FibreKing cloth is perfect for keeping your components clean and free of residue, while the Wurth brake cleaner offers powerful, residue-free cleaning for brakes, transmissions and other essential parts. 

For the rear differential we supply Castrol B373 which is a 90w mineral based extreme pressure gear oil which combines limited slip performance with excellent load carrying ability.
It is particularly suitable for use in clutch plate type limited slip differentials fitted to Race or Rally competition vehicles.

·         Ideal for competition vehicles with plate type LSDs

·         Maximises LSD performance

·         Provides high levels of protection even in harsh conditions

Specifications: API GL-6+, supplied in 1 litre bottles.

For the gearbox we supply Castrol Transmax Universal 75W-90 which is a high-performance, synthetic gear oil designed for both manual transmissions and differentials, offering exceptional versatility and reliability. Formulated to provide smooth shifting, superior wear protection, and outstanding performance under high-stress conditions, Transmax Universal 75W-90 is ideal for drivers who demand the best. 

This multi-functional oil reduces friction and heat buildup, extending the life of your transmission and differential components. With enhanced protection against wear, oxidation, and corrosion, Castrol Transmax Universal 75W-90 ensures your vehicle’s performance is optimized, even in the most challenging driving environments. 

Trust RCM for all-around quality and care. With our expertly designed products, your Subaru will perform at its best, mile after mile.