Differential pin / Jellybean. Porsche 356 with ZF Limited Slip Differential  ›  71833252501

Differential Pin / Jellybean
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The OE Match Differential Pin, commonly known as the Jellybean, is a replacement sliding component for the ZF limited slip differential fitted to selected Porsche 356B and 356C models.

Fits:

• Porsche 356B 1959-63
• Porsche 356C 1963-65

Located within the differential locking mechanism, this small but important component helps control the transfer of drive between the rear wheels, maintaining effective limited slip differential operation.

What Does It Do?

The Jellybean is a sliding element within the ZF limited slip differential mechanism.

It works with the internal differential components to help generate the locking action, improving the distribution of drive between the rear wheels when traction differs.

Why Does It Fail?

Common causes include:

• Wear from repeated differential operation
• Friction between internal sliding components
• Insufficient or incorrect lubrication
• Contaminated gearbox oil
• High mileage or prolonged use

When Should It Be Replaced?

Replace during differential rebuilding if the pin shows excessive wear, scoring, deformation or damage.

Worn sliding pins can affect the operation of the limited slip mechanism and contribute to inconsistent differential locking.

Checks & Installation

Inspect the differential sliding pins, mating gears and internal locking components for wear or damage.

Check gearbox oil condition and use the lubricant specified for the particular ZF differential.

Replacement should be carried out by a technician familiar with Porsche 356 gearbox and limited slip differential assemblies.

Key Features

• Also known as a Jellybean or sliding pin
• Designed for Porsche 356B and 356C
• Suitable for compatible ZF limited slip differentials
• Helps maintain correct differential locking operation
• Ideal for gearbox restoration and differential rebuilding

Porsche 356B / 356C ZF Limited Slip Differential Parts

The ZF limited slip differential helps improve traction by controlling the difference in drive between the rear wheels.

Its internal sliding pins, commonly called Jellybeans, are essential to the operation of the locking mechanism and should be inspected during gearbox restoration or differential servicing.

The OE Match Differential Pin 71833252501 provides a replacement option for worn or damaged sliding components in compatible Porsche 356B and 356C ZF differentials.