The 'SHIFT ROD BALL SPRING' for the Citroen 11CV is a vital component of the shift system. These spring balls provide the necessary tension and smoothness in shifting, allowing for accurate transmission engagement. For the Citroen 11CV, also known as the Traction Avant, a well-functioning gearbox is crucial for optimal performance and driving pleasure. Replacing or maintaining the shift rod ball spring can prevent wear and extend the entire transmission's lifespan. This small yet important part contributes to the legendary driving characteristics of this classic car.