# 5MT countershaft locknut (NA 1.8)

Canonical URL: https://miatatorque.com/spec/mt-countershaft-locknut-na-bp/

Applicability: NA 1994–1997 (BP, 5MT)

Confidence: fsm

95–144 ft·lb / 128–196 N·m

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": "mt-countershaft-locknut-na-bp",
  "name": "5MT countershaft locknut (NA 1.8)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1994,
        1997
      ],
      "engines": [
        "BP"
      ],
      "trans": [
        "5MT"
      ]
    }
  ],
  "kind": "torque",
  "torque": {
    "nm": [
      128,
      196
    ],
    "kgfm": [
      13,
      20
    ],
    "ftlb": [
      95,
      144
    ]
  },
  "procedure": {
    "notes": "Install a new locknut and stake it after tightening; secure the mainshaft with SST 49 0259 440. 1994 factory evidence; applicability to 1995–1997 is inferred within the owner-approved NA 1.8 year group."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1994",
      "page": "J–37",
      "as_printed": "128–196 N·m {13–20 kgf·m, 95–144 ft·lbf}",
      "verified_years": [
        1994,
        1994
      ],
      "torque": {
        "nm": [
          128,
          196
        ],
        "kgfm": [
          13,
          20
        ],
        "ftlb": [
          95,
          144
        ]
      },
      "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": "reaudit-1994",
  "componentName": "Additional 1994 factory service specifications",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/mt-countershaft-locknut-na-bp/"
}
```