Showing specs for all NA & NB Miatas

Fifth gear end play (NA8 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 synchronizer ring and fifth gear, steel ball and thrust lock washer; use only two 3.0 mm {0.118 in} C-washers in the front mainshaft groove. Push C-washers fully toward fifth gear and measure between thrust lock washer and C-washers. Select proper thrust lock washer to adjust, then install retaining ring. Distinct from rear-bearing washer-to-snap-ring clearance.

Applies to
  • NA 1994–1997 (BP, 5MT) — 1995–1997 inferred from 1994 factory evidence; actual-year verification is separate.
  • Verified in: 1994 Mazda MX-5 Miata Workshop Manual