# Automatic second-gear band adjusting locknut (NA 1.8)

Canonical URL: https://miatatorque.com/spec/at-second-band-adjusting-locknut-na-bp/

Applicability: NA 1994–1997 (BP, 4AT)

Confidence: fsm

11–28 ft·lb / 15–39 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": "at-second-band-adjusting-locknut-na-bp",
  "name": "Automatic second-gear band adjusting locknut (NA 1.8)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1994,
        1997
      ],
      "engines": [
        "BP"
      ],
      "trans": [
        "4AT"
      ]
    }
  ],
  "kind": "torque",
  "torque": {
    "nm": [
      15,
      39
    ],
    "kgfm": [
      1.5,
      4
    ],
    "ftlb": [
      11,
      28
    ]
  },
  "procedure": {
    "notes": "On-vehicle adjustment: tighten piston stem to 12.3–14.2 N·m {125–145 kgf·cm, 109–125 in·lbf}, back off 2 1/2 turns, then hold the stem while tightening the locknut. 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": "K–85",
      "as_printed": "15–39 N·m {1.5–4.0 kgf·m, 11–28 ft·lbf}",
      "verified_years": [
        1994,
        1994
      ],
      "torque": {
        "nm": [
          15,
          39
        ],
        "kgfm": [
          1.5,
          4
        ],
        "ftlb": [
          11,
          28
        ]
      },
      "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/at-second-band-adjusting-locknut-na-bp/"
}
```