From used unit to finished unit
A rebuilt transmission begins life as a used unit. That starting point matters, because the finished unit is not new, and no page on this site describes it as new. What changes between the used unit and the finished unit is the work applied in between. The unit is fully disassembled and its parts are classified and recorded. Core parts are screened, and parts showing wear, deformation, fatigue, or out-of-tolerance measurements are scrapped. Reusable parts are ultrasonically cleaned and checked again. High-wear parts such as friction plates, steel plates, seals, gaskets, filters, thrust washers, and rubber parts are replaced, and upgrades are applied to known weak points in the original design. Components are bench tested, the housing is refurbished, and the unit is reassembled to a standard sequence. Only then does the finished unit face its full-load dyno inspection, which covers main line oil pressure, clutch engagement, torque output, shift smoothness, working temperature, hydraulic condition, abnormal noise, and sealing.
How a rebuilt unit differs from a second-hand unit
A second-hand unit is sold in the condition in which it was removed, with whatever wear and faults it carries. A rebuilt unit, by contrast, has had its failed parts removed, its wear parts replaced, and its finished condition proven by a full-load test. The difference is not visible from the outside alone, which is why the record matters: the test data and quality inspection record retained for each finished unit are the evidence that the sequence was applied to that unit, rather than to a batch or a sample. A buyer who cannot obtain a record for the specific unit should treat the description with caution and ask what documentation will accompany the order before payment.
What accompanies a rebuilt unit
Each finished unit is checked against its model code, appearance, and sealing before packing. It is then cleaned, protected, and packed in an export fumigated solid wooden crate with shock and moisture protection, and packing photographs can be provided for the customer to check on request. The warranty described in company materials is at least one year. The exact warranty start point, scope, and claim route are order-specific and must be confirmed in writing, because a headline warranty period alone does not describe what is covered or how a claim is handled. Buyers should also confirm the packing customisation, if any, before placing an order, since packing that suits one destination or transport route may not suit another.
Buying in quantity
Wholesale and distributor buyers should confirm the same points as single-unit buyers, plus the points that only arise at quantity: whether the scope and test coverage are identical across the batch, how units are identified and recorded individually, and how packing is organised for the shipment as a whole. The documented process states that every finished unit is dyno tested, with no sampling, which is particularly relevant at quantity, because a sampling rule would leave part of a batch unproven. Please confirm that the full inspection applies to every unit in your order, and please confirm the minimum order quantity and the lead time before placing an order.
Confirm before you order
- Please confirm the transmission model code and the quantity in writing.
- Please confirm the minimum order quantity and the lead time before placing an order.
- Please confirm what test data and quality inspection records will accompany each unit.
- Please confirm the warranty terms, including the start point and the claim route, before payment.
- Please confirm the packing, the trade terms, and the payment terms before payment.
Questions buyers ask
Is a rebuilt transmission new?
No. It is a used unit that has been taken through the full documented sequence and tested. This site does not describe rebuilt units as new, and a buyer should be wary of any description that does.
What should I check on delivery?
Check the model code, the appearance, and the sealing against the order, and check the accompanying test and inspection record for the unit. Report any mismatch promptly and keep the packing until the check is complete.
Can the scope vary by model?
Yes. Upgrades for known weak points depend on the model, and the exact scope for a given model code must be confirmed in writing. Do not assume that the scope for one model applies unchanged to another.
Related pages
Transmission rebuild describes the service engagement. Certified rebuilt transmissions explains what documentation to ask for. Rebuilt transmission exchange explains the exchange arrangement.