Case Study: Transmission Cooler Supply for a bus operator in North America
Source:Case /
Time:2026-09-18
Transmission Cooler for A bus operator in North America
A bus operator came to us with a transmission cooler programme for North America. The brief was ordinary and unforgiving at the same time: a fixed launch window, a landed cost that had to survive freight and duty, and a part that had to match an existing sample. This case records what was specified, what went wrong in sampling and how the bulk order landed.
The starting point
- Premature wear on the first batch
- Packing that arrived crushed at the port
- Reorders that did not match the approved sample
What was specified
| Part | Transmission Cooler |
|---|---|
| Client | A bus operator |
| Market | North America |
| Volume | 20,000 pieces across 2 specifications |
| Base material | EPDM Rubber |
| Sampling rounds | 4 |
| Delivery window | 5 weeks from PO to ex-factory |
| Compliance | DOT |
How it was resolved
- The specification was rebuilt around EPDM Rubber and the tolerance locked before bulk.
- A pre-production sample was approved and kept as the golden reference.
- Production ran with in-line inspection and a mid-run photo report.
- Cartons were packed to the client's own barcode and ratio specification.
- Documentation shipped with the goods instead of after them.
Result
- 20,000 pieces delivered inside the 5-week window.
- Unit cost held within 3.0% of the original quotation.
- Inspection-related rejection stayed under 0.5%.
- The specification is on file, so reorders reproduce the approved sample.
What we would repeat
Lock the material standard before sampling. Once the base changes, every downstream approval has to be redone and the calendar slips.
Planning something similar?
Share a sample or a drawing and we will quote against a written specification, not against a photograph.
