28-7S/25T Fifth Gear for Toyota Hiace

This Toyota Hiace fifth gear is identified by the 28-7S/25T gear specification. It is a replacement gear for a manual transmission rebuild.

Compare tooth count, internal spline pattern, gear width and mating gear geometry. A gear specification should be matched to the transmission code as well as the vehicle model.

Send the transmission code, component number, tooth and spline counts and quantity. Include the principal dimensions and photographs of the original part.

Contact TOSEN for a quotation or browse Transmission Parts.

The 28-7S/25T gear specification identifies the fifth gear offered for Toyota Hiace manual transmission rebuilds. The fifth gear is the top forward ratio of the gearbox, the one engaged for steady cruising, and it is supplied here as a single gear rather than as a gearset or a complete transmission. Sustained highway operation loads the fifth gear pair, and a rebuild that finds damage at that position replaces the gear as an individual component. The specification carries the tooth and spline information needed for the match, which is why it anchors the order.

• Component: fifth gear, a single gear for the top forward ratio
• Gear specification: 28-7S/25T
• Application: Toyota Hiace manual transmissions
• Matching basis: transmission code together with the vehicle model

A gear specification belongs to the transmission code, not to the vehicle badge alone, so Hiace models with different gearbox codes can call for different gears even when the body is the same. Tooth count, internal spline pattern, gear width and the mating gear geometry are compared against the removed part before the order is placed. Photographs of the original gear and its markings support the comparison, and the transmission code read from the vehicle confirms the family the order belongs to.

• Primary check: transmission code read from the vehicle
• Gear checks: tooth count and internal spline pattern
• Geometry: gear width and mating gear geometry
• Support: photographs of the original gear and its markings

TOSEN checks each fifth gear enquiry against the 28-7S/25T specification and the transmission code recorded by the buyer. The tooth count, the spline pattern and the gear width from the original part are compared with the specification, and the quantity with the destination completes the record. The quotation that follows therefore covers the gear the Hiace gearbox actually needs.

What does the 28-7S/25T gear specification identify?

The specification identifies the fifth gear offered for Toyota Hiace manual transmissions, carrying the details used to match the gear to the gearbox. Tooth count, internal spline pattern and gear width follow from that designation, and the mating gear geometry is compared against the original part. A rebuild at the fifth gear position orders the gear under this specification rather than as part of a gearset.

Why is the transmission code needed alongside the Hiace model?

The vehicle model alone does not identify the gearbox version installed, and the same body style can leave the factory with different manual transmissions. The transmission code identifies the gear family the rebuild is working on, while the model name leaves that choice open. Reading the code from the vehicle before ordering keeps the gear matched to the gearbox actually installed.

Which measurements are compared when ordering this fifth gear?

Tooth count comes first, followed by the internal spline pattern that fits the shaft, the gear width that sets the assembly position, and the mating gear geometry that determines how the pair meshes. Each measurement is taken from the removed gear or from the gearbox documentation. Comparing all four against the specification prevents a mismatch that only appears at assembly.

What should a fifth gear enquiry for a Hiace rebuild include?

The enquiry carries the transmission code, the component number and the tooth and spline counts, together with the quantity and the principal dimensions of the gear. Photographs of the original part support the identification. With those details recorded, TOSEN can check the 28-7S/25T specification against the gearbox and quote the correct delivery.