Showing specs for all NA & NB Miatas

Mainshaft-to-gear/bush maximum clearance (NA6 5MT)

Maximum 0.006 in (0.15 mm)Maximum 0.15 mm (0.006 in)

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

Measure clearance between the mainshaft and gear or bush during disassembled transmission inspection. This is the inspection limit, not an assembly end-play setting.

Applies to
  • NA 1990–1993 (B6, 5MT) — 1991–1993 inferred from 1990 factory evidence; actual-year verification is separate.
  • Verified in: 1990 Mazda MX-5 Miata Workshop Manual