Yokomo Z4-302R Graphite Rear Transmission Case for YZ-4  [Z4-302R]

Yokomo Z4-302R Rear Transmission Case L/R (Graphite molded) for YZ-4
Price:
£3.43
Brand:
Yokomo
Model:
Z4-302R
GTIN:
3888
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Or you may find similar product under the
Spares / Hop-ups - Yokomo - YZ-4 category
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Sealed rear transmission case designed for YZ-4

This is a replacement rear transmission case for the YZ-4 4WD off-road chassis, molded from a graphite-enhanced resin to provide greater rigidity than common plastic housings while still fitting hobby-class vehicles.

The left and right halves form a sealed assembly to reduce ingress of dust and small stones, helping to maintain correct spur and pinion engagement and to prolong drivetrain life. The split design also makes periodic inspection and maintenance accessible for field or workshop use.

As an upgrade the part protects the gearbox under off-road loads and its increased stiffness can subtly change drivetrain behaviour compared with more flexible housings, offering tuners another lever to adjust rear-end characteristics on YZ-4 setups.

Compatibility

  • Supported Chassis: B-YZ4
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Is this case suitable for heavy off-road use?

The graphite-enhanced resin improves structural rigidity and offers better protection for gears under off-road conditions, though extreme impacts may still cause damage. Regular inspection after hard use is advised.

Will fitment require changes to existing components?

The case is specified for YZ-4 rear transmission fitment and supports the B-YZ4 chassis. Standard mounting points are maintained, so no routine modifications should be necessary for compatible builds.

How often should I inspect the gearbox with this case installed?

Despite the sealed design, periodic checks after off-road sessions are recommended to confirm gear mesh and bearing condition; the split halves make these inspections straightforward.

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