Tamiya SP-1643 37T Differential Case and Pulley - TRF420 Upgrade Kit [51643]

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

Price:

AUD$8.87

Brand:

Tamiya

Model:

51643

GTIN:

4950344516438

Condition:

Brand New

Quantity:

Available in shop

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Description
FAQ

Optimise the TRF420 driveline with the Tamiya SP-1643 pulley and case

For drivers chasing consistent lap times, the Tamiya SP-1643 - TRF420 Differential Pulley & Case (37T) is a practical replacement that restores drivetrain consistency. Tailored for the TRF420 racing chassis, the set refreshes worn pulleys and improves oil containment for fewer service stops.

Feature Highlights

Compatibility: Made for TRF420 and TA07 chassis to deliver a correct, repeatable fit.
Design Efficiency: Weight is reduced by 1.5g in the new design to sharpen acceleration and steering response.
Improved Sealing: Less oil leakage than earlier versions, reducing mess and maintenance frequency.
Complete Set: Contains one 37T differential pulley, one differential case, plus 0.2mm and 0.3mm shims to aid correct assembly.

How difficult is installation for a regular club racer?

Installation is straightforward for anyone familiar with TRF420 diffs. Follow standard diff rebuild procedures and use the supplied shims to set the correct clearance.

Should I change diff oil after fitting these parts?

Yes. After assembly fit the oil grade you normally run and check for leaks and smooth rotation on the bench before your first track session.

Does the lighter pulley require rebalancing other components?

The 1.5g reduction is small. Most users will not need to rebalance other parts, but top-level setups may adjust diff oil or weight distribution to match handling preferences.