Updated specs are available.
Synchronizer ring to gear flank clearance (NA6 5MT)
This spec doesn't apply to the car you selected.
Not yet checked against the factory manual for your car's year. It's verified in the 1990 Mazda MX-5 Miata Workshop Manual; later manuals may differ.
Standard 0.059 in (1.5 mm); minimum 0.031 in (0.8 mm)Standard 1.5 mm (0.059 in); minimum 0.8 mm (0.031 in)
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Set the synchronizer ring squarely in the gear, then measure clearance to the gear flank around the circumference. Inspect teeth and taper surface for wear or cracks. These limits apply to the NA6 five-speed inspection, not the Y16M-D six-speed.
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
Sources (1)
View 1 source citations
Page J–24 (PDF p. 356) · Printed value & notes
Part no. 1193-10-89CPage J–24 (PDF p. 356)Printed: “Standard clearance: 1.5mm (0.059 in) Minimum: 0.8mm (0.031 in)”
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- Drive gear radial clearances (Y16M-D 6MT)
- Reverse idler gear to shaft radial clearance (Y16M-D 6MT)
- Synchronizer ring to gear flank clearances (Y16M-D 6MT)
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- Countershaft runout — maximum (Y16M-D 6MT)
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