Showing specs for all NA & NB Miatas

Forward clutch input shaft-to-case height difference (SB4A-EL 4AT)

Standard height difference A About ≈0.11811 in (3.0 mm)Standard height difference A About 3.0 mm

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Assembly seating check when clutch discs/plates replaced. Transmission upright; measure the height difference at the shaft/case reference points shown. Preserve About; this is not an exact tolerance. If below standard, remove and reinstall forward clutch component (preceding page). Table inch precision differs; metric agrees.

Applies to
  • NB 2001–2005 (BP-Z3, 4AT) — 2003–2005 factory references identify this component manual; 2001–2002 inferred within NB2 non-turbo family.
  • Verified in: Mazda SB4A-EL Automatic Transmission Workshop Manual

Sources (2)

View 2 source citations
  • Mazda SB4A-EL Automatic Transmission Workshop ManualTier 1
    Page 05–13Y–46 (PDF p. 58) · Printed value & notes
    Part no. 9999-95-422H-99
    Page 05–13Y–46 (PDF p. 58)
    Printed: “Standard height difference A About 3.0 mm {about 0.1 in}”
  • Mazda SB4A-EL Automatic Transmission Workshop ManualTier 1
    Page 05–50–1 (PDF p. 87) · Printed value & notes
    Part no. 9999-95-422H-99
    Page 05–50–1 (PDF p. 87)
    Printed: “Height difference between forward clutch input shaft and transmission case (mm {in}) 3.0 {0.12}”