# Second-gear double-cone synchronizer ring to gear flank clearance (NA8 5MT)

Canonical URL: https://miatatorque.com/spec/second-synchronizer-ring-gear-clearance-na8-5mt/

Applicability: NA 1994–1997 (BP, 5MT) — 1995–1997 inferred from 1994 factory evidence; actual-year verification is separate.

Confidence: fsm

Standard 1.5 mm {0.059 in}; minimum 0.8 mm {0.031 in}

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "second-synchronizer-ring-gear-clearance-na8-5mt",
  "name": "Second-gear double-cone synchronizer ring to gear flank clearance (NA8 5MT)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1994,
        1997
      ],
      "engines": [
        "BP"
      ],
      "trans": [
        "5MT"
      ],
      "note": "1995–1997 inferred from 1994 factory evidence; actual-year verification is separate."
    }
  ],
  "kind": "non-torque",
  "value_text": "Standard 1.5 mm {0.059 in}; minimum 0.8 mm {0.031 in}",
  "procedure": {
    "notes": "Set the synchronizer ring squarely in second gear and measure clearance to the gear flank around the circumference. Inspect inner cone, double cone and synchronizer ring tapered surfaces, and teeth; replace the synchronizer assembly if damaged or worn. The NA8 manual distinguishes this assembly from the other five-speed synchronizer rings."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1994",
      "page": "J–24 (PDF p. 378)",
      "as_printed": "Synchronizer Assembly (2nd)\nClearance: 1.5 mm {0.059 in}\nMinimum: 0.8 mm {0.031 in}",
      "verified_years": [
        1994,
        1994
      ],
      "document": {
        "id": "fsm-1994",
        "tier": 1,
        "title": "1994 Mazda MX-5 Miata Workshop Manual",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1994,
              1997
            ],
            "engines": [
              "BP"
            ]
          }
        ],
        "note": "Mazda's base manual for 1994–97; later model years got supplements, which we haven't checked yet."
      }
    }
  ],
  "jobs": [],
  "system": "transmission",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/second-synchronizer-ring-gear-clearance-na8-5mt/"
}
```