Showing specs for all NA & NB Miatas

Fifth gear end play (NA6 5MT)

0.004–0.012 in (0.1–0.3 mm)0.1–0.3 mm (0.004–0.012 in)

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

Install the steel ball and thrust lock washer, then the C-washers and retaining ring. Measure between thrust lock washer and C-washers. Use two C-washers of the same thickness, 3.0 mm (0.118 in), at this assembly step; unequal thickness can cause bearing failure. Select thrust lock washer to adjust end play. This is distinct from the rear bearing C-washer clearance.

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