Tamiya SP-1643 TRF420 37T Pulley & Case - Precision Replacement [51643]

Tamiya 51643 - TRF420 Differential Pulley & Case (37T) SP-1643

Price:

£4.65

Brand:

Tamiya

Model:

51643

GTIN:

4950344516438

Condition:

Brand New

Quantity:

Available in warehouse

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Description
FAQ

Precision replacement for TRF420 differentials from Tamiya SP-1643

Hobbyists and racers seeking dependable drivetrain behaviour will find the Tamiya SP-1643 - TRF420 Differential Pulley & Case (37T) a useful service part. Intended for the TRF420 racing chassis, the kit refreshes worn components to keep gear engagement consistent and reduce the need for frequent adjustments.

Feature Breakdown

Compatibility: Specifically intended for TRF420 and TA07 chassis to ensure correct fit and operation.
Design Efficiency: The revised components cut 1.5g of weight, which helps reduce rotational inertia for crisper responses.
Improved Sealing: The upgraded sealing lowers oil leakage compared with earlier assemblies for tidier upkeep.
Complete Set: Supplied with a single 37T differential pulley, a differential case, and 0.2mm and 0.3mm shims to assist proper setup.

Will this replace a worn TRF420 pulley without extra parts?

Yes. The SP-1643 kit is a direct replacement and includes the shims needed for most rebuilds, so you can swap components and get back on track quickly.

What difference does improved sealing make day to day?

Improved sealing reduces oil escape, which means less mess on the chassis and more consistent diff performance between services.

Are the 0.2mm and 0.3mm shims usually enough?

Those shims cover common adjustment ranges for setting mesh and endplay. For precision tuning you can still mix with other shim sizes, but many users will find these sufficient for an initial rebuild.