Fourth-gear clutch piston stroke (SB4A-EL 4AT)

Air pressure ≈56.565 psi (390 kPa) max. Piston stroke ≈0.06969—0.10157 in (1.77—2.58 mm)Air pressure 390 kPa max. Piston stroke 1.77—2.58 mm

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

Procedure

Use a dial indicator while applying and releasing compressed air through the indicated assembly passage. Maximum 390 kPa {4.0 kgf/cm²,57 psi}. Never apply compressed air longer than 3 seconds at a time; the manual warns this damages the seal. Remove 4 GR planetary gear component first (PDF 62). Pack has 1 drive/1 driven plate. Procedure and table metric agree; printed inch endpoints differ.

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–51 (PDF p. 63) · Printed value & notes
Part no. 9999-95-422H-99
Page 05–13Y–51 (PDF p. 63)
Printed: “Air pressure 390 kPa {4.0 kgf/cm², 57 psi} max. Piston stroke 1.77—2.58 mm {0.07—0.101 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: “4GR clutch Number of drive/driven plates 1/1 4GR clutch clearance (mm {in}) 1.77—2.58 {0.07—0.10}”

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