Quick answer
To identify a Volvo transmission gear for a B2B quotation, start with the complete gearbox designation and suffix, then add the original OEM or catalog reference, the gear’s position in the transmission, tooth and spline counts, critical dimensions, and clear photographs of the old part. A truck model or a visual match alone is not enough. Catalog references can narrow the search, but final compatibility should be verified against the gearbox nameplate and the physical component before an order is approved.
This process is intended for importers, distributors, transmission rebuilders, repair networks and fleet procurement teams—not for consumer gearbox disassembly.
Why “Volvo transmission gear” is not a complete specification
A gearbox contains several gears with different functions and interfaces. Depending on the transmission design, a buyer may be looking for a speed gear, reverse gear, crawler gear, splitter component, sun gear, planetary component or another gear within a shaft assembly. Two parts may look similar while differing in tooth count, spline profile, width, mating component or revision.
The gearbox family matters as well. Volvo Trucks documents the VT2514B as a 14-speed range-and-splitter manual gearbox. Its official fact sheet describes a forward basic unit with basic gears, an integrated splitter, crawler and reverse gears, plus a rear range housing containing a planetary range gear. This architecture helps buyers describe where a required gear belongs, but it does not identify an orderable part by itself. (Volvo Trucks VT2514B fact sheet)
Do not assume that a gear associated with a VT/VTO manual gearbox also belongs to an AT/ATO I-Shift unit. Family classification is a starting point, not an interchange rule.
The identification hierarchy procurement teams should use
Use the strongest identifiers first and retain the weaker ones as supporting evidence.
| Identification input | What it can establish | What it cannot establish alone |
|---|---|---|
| Full gearbox model and suffix | Narrows the transmission family and version | Exact internal gear or supersession |
| Gearbox nameplate and serial | Provides unit-specific identification context | Condition of the old gear or automatic fitment approval |
| OEM or established catalog reference | Identifies a candidate orderable reference | Guaranteed compatibility when suffix or revision differs |
| Gear position/function | Distinguishes reverse, speed, splitter, range or other roles | Exact teeth, spline or dimensions |
| Tooth and spline counts | Helps compare the physical interface | Material, heat treatment or complete application |
| Critical dimensions | Helps reject visibly similar but different parts | Approved interchangeability without reference review |
| Old-part and mating-part photos | Shows profile, wear, markings and assembly context | Hidden revision or dimensional equality |
| Truck model or VIN | Provides useful vehicle context | Proof of the transmission currently installed or its internal gear |
For higher-value or multi-line orders, keep these identifiers together in one RFQ record. Separating the OEM number from the nameplate photo increases the risk of matching information from different gearbox versions.
How external catalog references should be used
Established technical catalogs are useful research tools when governed internal product data is incomplete. They should be used as references to verify—not as automatic fitment approvals.
For example, Euroricambi’s Volvo catalog lists a low-speed gear under references 1521907 and 21521907 and describes it as a 37-tooth item. Its VT2514B catalog also groups multiple gears within that model catalog. These listings support the wording “catalog-referenced for” or “listed in the VT2514B catalog.” They do not prove that the part fits every VT2514B suffix, production revision or rebuilt unit. (Euroricambi gear listing; VT2514B catalog)
Before ordering a catalog-referenced gear, compare:
- the complete gearbox designation and suffix;
- the original number stamped on the part or shown in controlled documentation;
- the installation position and adjacent shaft or synchronizer components;
- tooth count, spline count, width, bore and other measurable interfaces;
- old and replacement photographs taken from the same angles;
- any supersession note from an authoritative catalog or technical review.
If two reputable sources disagree, record the conflict. Do not silently select the number that produces the easiest match.
Gearbox model, gear number and vehicle model are different entities
These identifiers answer different questions:
- Gearbox model identifies the transmission family and configuration.
- Gear suffix narrows a design version or variant.
- OEM or catalog reference identifies a candidate component record.
- Vehicle model or VIN describes the truck and its build context.
- Physical gear data describes the component actually removed from the unit.
A vehicle model alone may be insufficient because transmissions can differ by market, specification or previous replacement. A rebuilt gearbox may also contain a later or earlier component revision. For that reason, the Volvo transmission identification guide should be used when the gearbox identity is uncertain before the gear inquiry begins.
A buyer decision table for gear inquiries
| Situation | Best next action | RFQ status |
|---|---|---|
| Gearbox plate, OEM number and readable old part are available | Submit all identifiers and dimensional evidence | Ready for compatibility review |
| Gearbox model is known but the gear has no readable number | Add position, tooth/spline counts, measurements and photos | Reference search required |
| Only the truck model is known | Identify the installed gearbox first | Not ready for final matching |
| Catalogs list the same number but suffix coverage is unclear | Use “reference to verify” and request technical confirmation | Conditional |
| Catalogs disagree on number or application | Preserve both sources and resolve the conflict | Hold until reviewed |
| The buyer requests a complete gear set | Supply every known shaft, position and mating-component identifier | Scope definition required |
Common ordering mistakes
Treating VT/VTO and I-Shift as one family
Volvo Trucks documentation places representative VT/VTO models under manual gearboxes and AT/ATO models under I-Shift. Do not move a gear reference between those groups without exact evidence.
Ordering by tooth count alone
The same tooth count does not prove the same bore, spline, width, helix, offset or mating geometry.
Assuming a catalog number is a confirmed cross-reference
A catalog association is a research reference unless an official source or governed internal record confirms the exact relationship.
Ignoring the mating components
Gear selection may depend on the shaft, synchronizer, spacer, bearing or adjacent gear. Ask the rebuilder to document the assembly position and related wear before quoting a replacement.
Converting an old product-page claim into a current commercial promise
Published website records do not confirm current stock, MOQ, price, delivery time, warranty, OEM status or authorization. Those fields must be confirmed in the current quotation.
Volvo transmission gear RFQ checklist
Send the following in one inquiry:
- complete gearbox model and suffix;
- clear gearbox nameplate and serial-number photo;
- original OEM or catalog reference, including every character;
- gear position or function in the gearbox;
- tooth count and spline count;
- critical dimensions and measurement method;
- clear photos of both faces, bore/spline, teeth and markings;
- photos of the shaft and mating components where relevant;
- quantity required;
- delivery destination;
- preferred condition or quality option only as a request, subject to confirmation.
Use the Volvo I-Shift Parts Buying Guide for the broader ordering workflow. To review the available commercial path, visit the Volvo Transmission Hub or browse the Volvo transmission parts category. A product listing is a discovery record; compatibility still requires review.
Frequently asked procurement questions
Can I order a Volvo transmission gear from the truck model?
Not safely in most cases. The truck model is supporting context, while the installed gearbox designation, suffix, component reference and physical evidence provide the stronger matching inputs.
Is a matching tooth count enough?
No. Tooth count can eliminate some candidates, but it does not confirm spline, bore, width, offset, mating geometry, revision or application.
Does a catalog association confirm fitment?
No. Unless an official source supports the exact relationship, treat catalog associations as references to verify against the complete gearbox and old part.
Should a gear and its mating components be reviewed together?
Yes. For a procurement inquiry, photographs and identifiers for the shaft, synchronizer or adjacent component can help define the required position and reduce ambiguity. A qualified workshop should determine serviceability.
What happens when two catalogs disagree?
Record both references, the exact disagreement and the gearbox identifiers needed to resolve it. Do not approve the order until the conflict is reviewed.
When are stock, MOQ and lead time confirmed?
They should be confirmed in the current quotation after the required part and quantity have been identified. This article makes no availability promise.
Request a compatibility review and quotation
For a structured gear inquiry, send the gearbox model and suffix, nameplate/serial photo, OEM or catalog number, gear position, tooth and spline counts, dimensions, old-part photos, quantity and destination through the contact and RFQ page.
The response should distinguish externally documented facts, catalog references requiring verification and commercial fields that are confirmed only in the quotation. No final compatibility decision should be based on the article alone.
