Differential Groups

Ring and Pinion for differential group. Satellite boxes for trucks, tractors, public works and industry. Sale shop in valencia and on line. High quality at the best prices. Shipping worldwide since 1950.

Drive pinion and ring gear spare parts for truck differential assembly

In this specialized section you will find a wide range of drive pinion and ring gear sets, critical components responsible for transmitting engine torque from the transmission to the vehicle’s wheels. These mechanical parts are essential for repair and proper operation of the differential group, especially in industrial vehicles and trucks that carry heavy workloads and require constant traction.

Our catalog is aimed at workshop professionals, fleet managers and mechanics looking for high-precision spare parts to restore drive axle efficiency. We offer solutions designed to withstand the friction and mechanical stress typical of heavy transport, enabling effective replacement that extends the service life of the vehicle’s drivetrain.

Criteria for choosing the right bevel gear set

• Gear ratio: It is vital to check the number of teeth on the pinion and the ring gear to maintain the original differential ratio and not alter the truck’s speed or pulling power.
• OEM reference: Always compare the manufacturer reference (OEM) of the damaged part with that of the replacement to ensure full geometric compatibility.
• Axle type and model: Make sure the set is specific to the model of your vehicle’s rear axle housing or drive axle, as dimensions vary between brands.
• Pinion splines: Count the number of splines on the drive pinion shaft to ensure it mates perfectly with the transmission flange.

Frequently asked questions

Is it mandatory to replace the drive pinion and ring gear at the same time?

Yes, this is standard practice in mechanics. These components are manufactured and matched as pairs (“bevel gear sets”) to ensure perfect tooth contact. Replacing only one of the two parts usually leads to noise, vibrations and premature, irreversible wear of the new part.

What symptoms indicate wear on the pinion and ring gear?

The most obvious sign is a humming or howling noise from the rear axle that varies with acceleration or speed. Excessive play when shifting (sharp “clonk” knocks) or unusual vibrations in the drivetrain may also be noticed, indicating that the tooth mesh is no longer correct.

How do I calculate the differential ratio if I don’t have the reference?

You must count the teeth on the ring gear and divide them by the teeth on the drive pinion. The result is the reduction ratio (for example, 39 ring gear teeth / 11 pinion teeth = 3.54 ratio). It is crucial to respect this figure so the vehicle retains its factory performance.

What maintenance do these parts require after installation?

Once the bevel gear set has been installed and adjusted (including bearing preload and tooth contact pattern), it is essential to use the lubricating oil with the viscosity recommended by the manufacturer. It is advisable to check the gear oil level periodically and replace it according to maintenance intervals to prevent overheating due to friction.