I have personally heard this annoying trait for many years on these roadsters and on other makes of cars, this is not to get mixed with the pilot bearing in the fly wheel.

Now i know there is loads of you out there with this very annoying rumble when you lift off the clutch ( I know Danny does),So...

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This guide will cover all gearbox speed drives from 1989 - 2005 Mk1 1.6, 1.8 , 4 Spd Automatics and 5 Spd manuals, Mk2/Mk2.5 1.6,1.8 ,4 speed Automatic, 5 Spd manual and 6 Spd manual and the different diffs fitted through the years as they get swapped about in between the...

This is a WARNING and the fix before it happens to the MK 1 1.6/1.8 Automatic version Eunos Roadsters or Miata Roadsters....

This is a simple part to change, but if left can give you no end of trouble and headaches.

It is the Automatic gearbox diaphragm on the side of the gear box underneath...

Quick guide for that job that has to be done sooner or later as the rubber tears and the gearstick and surroundings get hot!

For the start you'll need 10mm socket, and a 10mm spanner, a philips screwdriver, (optionally a pair of pliers, turkey baster, some gearbox oil, vaseline/silicon lube...