Five-speed manual transmission (Mondeo 3)

As standard, the Mondeo transmits its engine power to the drive wheels via a manually shifted five-speed gearbox (MTX-75). The MTX-75 gearbox is an old friend from the Ford unit stock: for example, it is also used by powerful Focus variants. The 2001 Mondeo "shifts and controls", of course, a thoroughly modified version of the MTX-75. For example, it has.

• new external gear shift levers,
• output shaft of a different design - the small gear here is a strong component of the shaft,
• gearbox housing matched to the new engine.

As before, the MTX-75 gearbox operates as a two-shaft design: the letter M stands for "manual", T for gearbox, X for front-wheel drive, and the number 75 characterizes the distance in millimeters between the drive and driven shafts.

In neutral, none of the drive wheels are in contact with the drive or driven shaft: no torque is transmitted to the differential. Only one tapered roller bearing positions the drive and driven shafts on the clutch and gearbox sides at the corresponding halves of the gearbox housing. The small pinion of the driven shaft is in constant engagement with the cylindrical gear of the differential - this is a part of the driven shaft. The transfer gears - 1/3 gear and the synchronizer clutch - 1/3 gear are located on the drive shaft. The engagement for gears 1, 2 and reverse are parts of the driven shaft. The transfer gears 1/2/5 and reverse are located on the driven shaft. The engagement for gears 3 and 4, as well as the small pinion of the drive shaft, are parts of the driven shaft. Gears 1-3 have double synchronization. It consists of an internal synchronizing ring, a conical ring, an external synchronizing ring and a synchronizer body. The transmission wheel does not have a conical surface: synchronization is performed by means of synchronizing rings and a conical ring connected by a kinematic closure to the transmission wheel. In addition, the reverse stroke is also synchronized.




Dual synchronization standard for first three gears

1 - Transfer gear, 2 - Internal synchronizing ring, 3 - Conical ring,	4 - Outer synchronizing ring, 5 - Synchronizer body.

Gearbox repair – when in doubt, an option for a workshop

Depending on the engine options, Mondeo gearboxes operate with different gear ratios. According to practice, the automobile life of MTX-75 gearboxes is quite long. If you think that you have an exception to this rule, then it is better to go to a specialized workshop, since they use a special tool and at the same time require the appropriate competence and experience. If not, then there is no reason for false shame: many workshops send gearboxes subject to repair, as a rule, to their manufacturers for revision on stands or immediately replace them with exchange units.

Modern gearbox design: mechanical gearbox MTX-75

1 — Clutch housing, 2 — Drive shaft, 3 - Transmission, 4 — Driven shaft,	5 - Intermediate reverse gear, 6 — Gearbox housing, 7 - External switching.

TECHNICAL DICTIONARY

This is how a manual transmission works The engine power is transmitted via the clutch to the drive shaft (input shaft) of the manual transmission. This shaft contains five helical gears (plus one gear for reverse). All the gears have their matching partner on the driven shaft, and they are in constant contact with each other. Gears and shafts Until the gears come into contact with their partner, they rotate freely. As soon as the gear is engaged, the corresponding pair of gears are connected to each other in a force lock. The gear shift lever acts on the gear shift fork by means of cable rods, "balancers" and rods. It connects the gear wheels with each other in a force lock by means of a movable sleeve. In order for both wheels to find each other quickly and silently during the shifting process, the synchronizing rings bring this "pair" to the same rotational speeds: for this purpose, they "brake" the faster gear in the starting cone until the tooth profiles of the gear wheels come into silent contact and slide into each other. Individual transmissions The first three gears shift the engine speed to a slower one. From the fourth gear onwards, the drive wheels rotate "faster" than the engine. Experts speak here of a long-distance gearbox, which deliberately maintains a stable torque in the new Ford engines. In the fifth gear, the difference between the engine and drive speeds increases even more: this spares the engine, "not tightening the noose around its neck", and reduces fuel consumption, especially over long distances. In all forward gears, the gap is formed by two gears. Only the reverse gear uses three gears. The third gear, also called the intermediate gear, rotates on its own shaft; it becomes active when the driven shaft needs to change its direction of rotation for reverse gear. Shortcut: Power flow in first gear. 1 — Drive shaft, 2 — Driven shaft, 3 — Small gear of the driven shaft, 4 - Transfer gear, 5 - Synchronizer, 6 - Engagement Reversing the direction of rotation: The intermediate wheel makes this possible. 1 — Drive shaft, 2 — Driven shaft, 3 — Small gear of the driven shaft, 4 - Synchronizer, 5th gear and reverse, 5 — Reverse gear pinion, 6 — Reverse intermediate gear, 7 — Reverse engagement.