Crash gearbox

{
  "id": "MLC-T-IND-001422",
  "term": "Crash gearbox",
  "field": "Industrial and trades",
  "definition": "A type of manual transmission that lacks synchronizers, requiring the driver to carefully match engine speed to road speed when shifting gears. Without synchronizers, gear changes involve double-clutching or precise rev-matching to avoid grinding the gears. This design was common in older vehicles before the widespread adoption of synchromesh transmissions.",
  "synonyms": [
    "crash box"
  ],
  "subject": "Shop talk and trade slang",
  "see_also": [
    "crash box"
  ],
  "references": [
    "Simple Mechanic: crash gearboxes (Commercial Motor Archive)"
  ],
  "translations": {
    "de": "Crash-Getriebe",
    "es": "caja de cambios de engranajes deslizantes",
    "fr": "boîte de vitesses non synchronisée"
  },
  "url": "https://mlchart.com/terminology/industrial/crash-gearbox/"
}