Compare Tank 300 gearbox choices through exact petrol, diesel or hybrid identity, service evidence, road testing and destination support.
Name the complete engine and transmission combination
Request build information and applicable original-market specifications for both offers. The China 2025 petrol announcement identifies a 9AT update, while regional hybrid documentation uses its own transmission description. Those references establish named examples, not universal fitment. An earlier or overseas car may follow a different range. Use the drivetrain identity guide and retain the actual gearbox record in the vehicle file. Ask the seller to explain whether AT or HAT shorthand is being used accurately. A nine-speed claim without supporting engine and system identity should not attract a premium.
Compare actual road behaviour rather than a gear-count slogan
Arrange permitted cold and warm trials with the applicable operating instructions. Observe engagement, ordinary acceleration, steady driving, deceleration and parking behaviour. Record load, tyre configuration and route conditions so a comparison can be repeated. More available ratios do not automatically establish smoother low-speed operation or a quieter motorway result. The noise and vibration trial helps separate the impression from an unresolved fault. Do not provoke repeated hard acceleration or inappropriate mode changes to demonstrate performance. A qualified assessor should investigate symptoms instead of dismissing them as normal because the car is newer.
Review service evidence for the installed unit
Match invoices, mileage and work descriptions to the VIN and actual transmission. Confirm which scheduled or condition-led operations apply and which fluid specification is required. Do not use a single flush interval or material for every Tank drivetrain. The maintenance and parts record sets the wider process. A seller statement that the gearbox was serviced should identify the work and evidence, not just a recent invoice for engine oil. Keep undocumented intervals visible as a question for the inspector. Service history informs the assessment but does not replace a current operating and diagnostic review.
Keep hybrid-system checks separate from conventional AT checks
If either candidate is electrified, request assessment suitable for its actual energy system and transmission arrangement. Low-voltage condition, battery evidence, control warnings and region-specific diagnostic access can affect the evaluation. The HEV and Hi4-T battery inspection provides the separate technical brief. Do not declare a hybrid transmission healthy from a conventional petrol road test alone. Equally, the HAT label does not establish that a car is a particular plug-in version. Preserve the exact architecture and any untested functions so the buyer understands what the comparison does and does not prove.
Ask the receiving workshop about repair and parts access
Identify which workshop can diagnose each exact unit and obtain matching technical information. Ask about correct service materials, component identification and any required electronic setup. A mechanic familiar with the brand but not the variant may need additional support. Record that limitation before purchasing. Imported warranty needs its own provider and destination confirmation. Do not use a foreign advertised warranty duration as a substitute for accessible paid servicing. If a known fault exists, obtain a complete supported estimate rather than predicting that the higher gear count always costs more or always lasts longer.
Compare a preparation-adjusted premium
Put both candidates on the same delivery and inspection basis. Add identified maintenance, tyres and any diagnosed drive-system work; keep unresolved symptoms outside a speculative cheap repair allowance. The 2024-versus-2025 comparison helps value a verified factory update without confusing it with a registration date. Include any meaningful route-based running-cost difference only where evidence supports it. Do not price an unverified fuel-saving percentage into the decision. A sound earlier transmission can remain good value beside a newer unit with uncertain history, and the reverse can also be true.
Choose the supported powertrain that passes the brief
Prefer the candidate whose identity, service record, inspection and intended use are coherent within the available budget. Pay for a newer transmission package when its demonstrated benefits matter and ownership support is established. Pause when the seller cannot reconcile engine and gearbox descriptions or when a symptom is unexplained. Keep the accepted configuration in the contract and handover records. A substitute car requires a fresh check even if both adverts say nine-speed. The decision should survive inspection findings and quote changes rather than depend on treating gear count as a universal quality ranking.
Evidence to collect
- Exact AT or HAT identity
- Original-market production record
- Cold and warm operating findings
- Correct service and fluid evidence
- Receiving-workshop support and price scope
Primary references
The China announcement and Australian brochure describe their own ranges. Neither identifies an arbitrary used VIN. Verify its installed system, applicable service information and qualified findings.
China 2025 petrol update: its stated 9AT range ↗GWM Australia brochure: regional engine/transmission distinctions ↗Frequently asked questions
Is a Tank 300 9AT the same as every 9HAT?
No. Identify the full engine and electrified-system arrangement; similar gear counts do not establish interchangeability.
Does an extra gear guarantee lower fuel consumption?
No. Use route- and configuration-specific evidence rather than a gear-count assumption.