# Differential pinion-height adjustment tolerance (NB2 and Mazdaspeed)

Canonical URL: https://miatatorque.com/spec/differential-pinion-height-adjustment-tolerance-nb2/

Applicability: NB 2001–2005 (BP-Z3) — Actual 2003, 2004 and 2005 factory evidence; 2001–2002 inferred within the owner-approved NB2 non-turbo family.; NB 2004–2005 (BP-Z3-TURBO) — Actual 2005 shared factory driveline specifications; 2004 MSM inferred with owner approval.

Confidence: fsm

−0.032–0.032 mm {−0.001–0.001 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": "differential-pinion-height-adjustment-tolerance-nb2",
  "name": "Differential pinion-height adjustment tolerance (NB2 and Mazdaspeed)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2001,
        2005
      ],
      "engines": [
        "BP-Z3"
      ],
      "note": "Actual 2003, 2004 and 2005 factory evidence; 2001–2002 inferred within the owner-approved NB2 non-turbo family."
    },
    {
      "gen": "NB",
      "years": [
        2004,
        2005
      ],
      "engines": [
        "BP-Z3-TURBO"
      ],
      "note": "Actual 2005 shared factory driveline specifications; 2004 MSM inferred with owner approval."
    }
  ],
  "kind": "non-torque",
  "value_text": "−0.032–0.032 mm {−0.001–0.001 in}",
  "procedure": {
    "notes": "Factory setup adjustment tolerance. Use the specified pinion-height fixture, average the left/right gauge readings, and account for the number inscribed on the drive-pinion end: subtract the inscribed number divided by 100; use zero if no number is inscribed. Select the matching spacer using the complete overhaul procedure. This is not the distance from the pinion to the ring gear."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-2005",
      "page": "Driveline/Axle Technical Data (PDF p. 1212)",
      "as_printed": "Pinion height\n(mm {in})\n−0.032—0.032 {−0.001—0.001}",
      "verified_years": [
        2005,
        2005
      ],
      "document": {
        "id": "fsm-2005",
        "tier": 1,
        "title": "2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3"
            ]
          },
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3-TURBO"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    },
    {
      "source": "fsm-2003",
      "page": "Driveline/Axle Technical Data (PDF p. 1058)",
      "as_printed": "Pinion height\n(mm {in})\n−0.032—0.032 {−0.001—0.001}",
      "verified_years": [
        2003,
        2003
      ],
      "document": {
        "id": "fsm-2003",
        "tier": 1,
        "title": "2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "note": "Normally aspirated BP procedures audited; turbo procedures are covered separately."
      }
    },
    {
      "source": "fsm-2004",
      "page": "Driveline/Axle Technical Data (PDF p. 1078)",
      "as_printed": "Pinion height\n(mm {in})\n−0.032—0.032 {−0.001—0.001}",
      "verified_years": [
        2004,
        2004
      ],
      "document": {
        "id": "fsm-2004",
        "tier": 1,
        "title": "2004 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2004,
              2004
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "note": "Normally aspirated BP procedures audited; turbo procedures are covered separately."
      }
    }
  ],
  "jobs": [],
  "system": "driveshaft-differential",
  "component": "differential-inspection",
  "componentName": "Differential overhaul inspection and selection",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/differential-pinion-height-adjustment-tolerance-nb2/"
}
```