On Mazda 6 cars, a manual transmission mod. G35M-R or G66M-R is installed in the basic configuration (depending on the type of engine used)

Manual transmissions differ in gear ratios and the design of individual parts, but they have a fundamentally common layout (the six-speed G66M-R gearbox has differences in layout due to the presence of VI transmission) and installation dimensions

On request, a five-speed automatic transmission mod. FS5A-EL can be installed on cars with a 2.0 l gasoline engine, the installation dimensions of which are similar to the dimensions of manual transmissions.

The G35M-R and G66M-R manual transmissions are removed and installed in almost the same way.

Design feature of the Mazda 6 manual transmission

Design feature of the Mazda 6 manual transmission

The manual transmission mod. G35M-R (Fig. 1) or G66M-R (Fig. 2) is made according to a two-shaft scheme, with synchronized forward gears.

Gearbox and main gear with differential have a common crankcase

The clutch housing is attached to the front of the gearbox housing

A stamped steel cover is installed on the back of the gearbox housing.

Forward gears are activated by axial movement of synchronizer couplings mounted on shafts

The gearshift mechanism is located inside the gearbox housing on its left side

Outside there are two levers of the mechanism: the gear selection lever and the shift lever.

The manual transmission control drive consists of a gearshift lever with a ball bearing mounted on the base of the body, two shift and gear selection cables, as well as a mechanism installed in the gearbox crankcase

To ensure a clear gearshift, the gearshift lever of the gearshift mechanism is made in one piece with a massive counterweight.

The gear selection and shift cables are structurally different from each other and are not interchangeable.

The main gear is made in the form of a pair of cylindrical gears, matched by noise

The torque is transmitted from the driven gear of the main gear to the differential and then to the front wheel drives.

The differential is conical, two-satellite

The tightness of the connection of the internal hinges of the front wheel drives with the differential gears is provided by the seals.

Possible malfunctions of the manual transmission and ways of elimination

Vibration and noise in the gearbox

- loosening of the fastening or damage to the engine suspension and gearbox supports

Tighten the fasteners or replace the supports

- wear or damage to gears and bearings

Repair the gearbox

- oil of the wrong brand is filled in

Pour the required grade of oil

- insufficient oil level

Top up the oil to normal

- violation of engine idling adjustment

Adjust the engine idling

Difficult gear shifting and grinding when shifting

- malfunction of the gearshift drive cables

Replace the gearshift cables

- oil of an inappropriate brand is filled in

Pour the required grade of oil

- loose fit or wear of locking rings and synchronizer cones

Repair the gearbox

- loosening of synchronizer springs

Repair the gearbox

- incomplete clutch activation

Repair the clutch release drive and pump the clutch system

Spontaneous gearshift

- wear of the gearshift forks or breakage of the locking springs

Repair the gearbox

- increased clearance of the synchronizer coupling on the hub

Repair the gearbox

Oil leak

- destruction or damage of oil seals or o-rings

Replace the oil seals or O-rings