Showing specs for all NA & NB Miatas

Differential side-gear thrust-washer selection (NB2 open differential)

Mark 0: ≈0.07874 in (2.00 mm); mark 0.5: ≈0.08071 in (2.05 mm); mark 1: ≈0.08268 in (2.10 mm); mark 1.5: ≈0.08465 in (2.15 mm); mark 2: ≈0.08661 in (2.20 mm)Mark 0: 2.00 mm; mark 0.5: 2.05 mm; mark 1: 2.10 mm; mark 1.5: 2.15 mm; mark 2: 2.20 mm

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

Open differential only. Select the thrust washers required to achieve side-gear/pinion-gear backlash of 0–0.1 mm. Mark numbers identify thickness choices; they are not backlash measurements. Follow the full factory differential reassembly procedure and secure the pinion-shaft knock pin as specified.

Applies to
  • NB 2001–2005 (BP-Z3, open) — Actual 2005 factory evidence; other years in the approved family inferred with owner approval.
  • Verified in: 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)

Sources (1)

View 1 source citations
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
    Page Thrust Washers (Standard) Assembly Note (PDF p. 1201) · Printed value & notes
    Page Thrust Washers (Standard) Assembly Note (PDF p. 1201)
    Printed: “Thrust washer thickness Identification mark Thickness 0 2.00 mm {0.0787 in} 0.5 2.05 mm {0.0807 in} 1 2.10 mm {0.0827 in} 1.5 2.15 mm {0.0846 in} 2 2.20 mm {0.0866 in}”

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