26/10/2026
Continuous Development, Improved Lubrication and Enhanced Durability for Demanding Motorsport Applications
The Peugeot/Citroën BE-series gearboxes are not particularly well known for the effectiveness of their original lubrication system, which can become a significant limitation under demanding motorsport conditions.
When using shorter gear ratios, certain gearbox components operate at higher rotational speeds for a given vehicle speed. In addition, the use of a plate-type L*D can generate additional heat inside the gearbox, further increasing the demands placed on the lubrication system.
To address these challenges and improve the overall reliability and durability of our BE4R close-ratio gear sets, we have introduced several important upgrades:
1. Parkerising Treatment of the Mainshaft
Our mainshaft undergoes a specialised Parkerising (manganese phosphate) surface treatment, offering several benefits, including improved oil retention, a reduced risk of scuffing and galling, and enhanced running-in characteristics.
2. Precision Honing of the Gear Bores
The internal bores of the gears undergo a precision honing process to achieve a smoother surface finish and improved dimensional accuracy, resulting in better lubrication conditions and reduced friction and wear.
3. Optimised Internal Oil Grooves and Lubrication Holes
Specially designed internal oil grooves and lubrication holes improve lubricant distribution throughout the gear assembly, helping to reduce the risk of oil starvation and premature wear.
4. Needle Roller Bearing Upgrade – 3rd Gear
We previously introduced an important modification to our BE4R close-ratio gear sets by redesigning the mainshaft to accommodate a needle roller bearing for 3rd gear, reducing friction and heat generation, improving load support and enhancing durability.
5. NEW! Needle Roller Bearing Upgrade – 5th Gear
Our engineering team has redesigned the internal bore of 5th gear to accommodate a new needle roller bearing, allowing this upgrade to be easily retrofitted to previous versions of our BE4R close-ratio gear sets at minimal cost.
