Description and operating principle of MTX-75 (Focus 1)

Gearbox in block with driving axle MTX-75 - Cars manufactured up to 01.2000.

Pos.	Spare Part No	Name
1	-	Gearbox housing, clutch side
2	-	Clutch slave cylinder
3	-	Differential
4	-	Secondary shaft
5	-	Primary shaft
6	-	Gearbox housing in block with drive axle
7	-	Gear selection mechanism

Gearbox in block with driving axle MTX-75 - Cars manufactured from 01.2000 onwards.

Pos.	Spare Part No	Name
1	-	Gearbox housing, clutch side
2	-	Clutch slave cylinder
3	-	Differential
4	-	Secondary shaft
5	-	Primary shaft
6	-	Gearbox housing in block with drive axle
7	-	Gear selection mechanism

Gearbox in block with driving axle MTX-75 - Cars manufactured from 10.2001 onwards.

Pos.	Spare Part No	Name
1	-	Gearbox housing, clutch side
2	-	Clutch slave cylinder
3	-	Differential
4	-	Secondary shaft
5	-	Primary shaft
6	-	Gearbox housing in block with the driving axle - from the gearbox side in block with the driving axle
7	-	External gear shift mechanism.

The MTX75 manual transmission is a so-called "two-shaft" transmission in a block with a drive axle
MTX-75 means:

• M - Mechanical
• T - Gearbox
• X - Gearbox in block with leading axle (front wheel drive)
• 75 - Distance between primary and secondary shafts in mm.

The aluminum gearbox housing in the block with the drive axle consists of two sealed sections. To reduce the level of noise and vibration, additional ribbing was introduced into the housing design, increasing the rigidity of the structure.

The gears in all gears of the "dual-shaft" gearbox are in constant engagement. In each gear, the required gear ratio is provided by a pair of gears.

When reverse gear is selected, the direction of rotation of the secondary shaft is changed by the intermediate gear.

The primary and secondary shafts are mounted on roller bearings.


To further improve the stability and quality of gear shifting, the design of the gear selector mechanism has been modified to incorporate a maintenance-free cable operating mechanism.
All gears, including the reverse gear, are synchronized helical gears running on needle roller bearings.

First, second and third gears (cars manufactured up to 08.2000) have double synchronization.

Primary and secondary shafts

General view of the primary and secondary shafts

Pos.	Spare Part No	Name
1	-	Reverse intermediate gear
2	-	Reverse gear pinion
3	-	Fifth gear pinion
4	-	Fourth gear pinion
5	-	Third and fourth gear synchronizer
6	-	Third gear pinion
7	-	Second gear pinion
8	-	First gear pinion
9	-	Primary shaft
10	-	Secondary shaft
11	-	Secondary shaft drive gear
12	-	First gear pinion
13	-	First and second gear synchronizer
14	-	Second gear pinion
15	-	Third gear pinion
16	-	Fourth gear pinion
17	-	Fifth gear pinion
18	-	Synchronizer of fifth gear and reverse gear
19	-	Reverse gear pinion

In the neutral position, none of the gears are connected to the primary or secondary shaft via the corresponding synchronizer. No torque is transmitted to the differential.

The primary and secondary shafts are mounted on two roller bearings: one of which is located in the section of the gearbox housing in the block with the drive axle on the clutch side, and the other is in the section of the gearbox housing in the block with the drive axle on the gearbox side in the block with the drive axle.



The secondary shaft drive gear is in constant engagement with the differential drive ring gear.

The third and fourth gear pinions and the third and fourth gear synchronizer are located on the primary shaft. The toothed rims of the first, second and reverse gear pinions are an integral part of the primary shaft.

The gears of the first, second, fifth and reverse gears and the synchronizer of the first and second gears and the synchronizer of the fifth gear and reverse gear are located on the secondary shaft. On cars manufactured up to 07.2000, the toothed rims of the gears of the third and fourth gears are an integral part of the secondary shaft.

Differential

The main elements of the differential:

• Output gear;
• Cylindrical gear;
• Four gears (differential satellites and axle gears) located at right angles to each other;
• Differential housing with two roller bearings

The gearbox in the block with the drive axle is installed in a two-section aluminum crankcase, which has a flange mount to the engine.

The axle shafts have knurled teeth and are secured with retaining rings. Torque is transmitted from the cylindrical gear to the axle shafts using two satellites mounted on the axle and two axle shaft gears.

When turning a corner, the axle gears must rotate at different speeds because the wheels travel different distances. This is achieved by differential satellites that rotate on their own axis and engage the axle gears, which rotate at different speeds.

First gear

Pos.	Spare Part No	Name
1	-	Primary shaft
2	-	Secondary shaft
3	-	Secondary shaft drive gear
4	-	First gear pinion
5	-	Synchronizer of the first and second gears
6	-	First gear pinion

Second gear

Pos.	Spare Part No	Name
1	-	Primary shaft
2	-	Secondary shaft
3	-	Secondary shaft drive gear
4	-	Synchronizer of the first and second gears
5	-	Second gear pinion
6	-	Second gear pinion

Third gear

Pos.	Spare Part No	Name
1	-	Primary shaft
2	-	Secondary shaft
3	-	Secondary shaft drive gear
4	-	Third gear pinion
5	-	Third and fourth gear synchronizer
6	-	Third gear pinion

Fourth gear

Pos.	Spare Part No	Name
1	-	Primary shaft
2	-	Secondary shaft
3	-	Secondary shaft drive gear
4	-	Fourth gear pinion
5	-	Fourth gear pinion
6	-	Third and fourth gear synchronizer

Fifth gear

Pos.	Spare Part No	Name
1	-	Primary shaft
2	-	Secondary shaft
3	-	Secondary shaft drive gear
4	-	Fifth gear pinion
5	-	Synchronizer of fifth gear and reverse gear
6	-	Fifth gear pinion

Reverse gear

Pos.	Spare Part No	Name
1	-	Primary shaft
2	-	Secondary shaft
3	-	Secondary shaft drive gear
4	-	Synchronizer of fifth gear and reverse gear
5	-	Reverse gear pinion
6	-	Reverse intermediate gear
7	-	Reverse gear pinion

Reverse intermediate gear

Pos.	Spare Part No	Name
1	-	Retaining ring
2	-	Upper thrust washer
3	-	Reverse intermediate gear
4	-	Needle roller bearing
5	-	Lower thrust washer

The reverse intermediate gear is driven by the primary shaft. Its purpose is to change the direction of rotation of the secondary shaft when reverse gear is selected.

The reverse gear intermediate gear is located on the intermediate gear shaft and is mounted on a needle bearing.

Gear Selector Lock Mechanism

Pos.	Spare Part No	Name
1	-	Gear selector housing
2	-	Position of the first, third and fifth gear selection finger
3	-	Intermediate position of the gear selector finger
4	-	Position of the second and fourth gear selection finger and reverse gear
5	-	Gear selector finger
6	-	Gear selection shaft

The gear selector lock mechanism and gear selector pin are mounted on a sleeve in the gear selector housing and, by means of a spring-loaded ball, hold the selected gear in engagement until another gear is selected.

The gear selector lock mechanism has three positions. The reverse light switch is located on the side of the gear selector mechanism housing.

Primary shaft - Vehicles manufactured up to 08.2001.

Pos.	Spare Part No	Name
1	-	Roller bearing
2	-	Primary shaft
3	-	Needle bearing for third gear pinion
4	-	Third gear pinion
5	-	Third gear synchronizer inner ring
6	-	Third gear synchronizer cone ring
7	-	Third gear synchronizer outer ring
8	-	Synchronizer assembly for third and fourth gears
9	-	Retaining ring
10	-	Fourth gear synchronizer ring
11	-	Fourth gear needle roller bearing
12	-	Fourth gear pinion
13	-	Fifth gear pinion
14	-	Retaining ring
15	-	Roller bearing

Primary shaft - Vehicles manufactured from 08.2001 onwards.

Pos.	Spare Part No	Name
1	-	Roller bearing
2	-	Primary shaft
3	-	Needle bearing of third gear pinion
4	-	Third gear pinion
5	-	Third gear synchronizer ring
6	-	Synchronizer assembly for third and fourth gears
7	-	Retaining ring
8	-	Fourth gear synchronizer ring
9	-	Fourth gear needle roller bearing
10	-	Fourth gear pinion
11	-	Fifth gear pinion
12	-	Retaining ring
13	-	Roller bearing

Third, fourth, fifth and reverse gears located on the secondary shaft - Vehicles manufactured up to 07.2000.

Pos.	Spare Part No	Name
1	-	Third gear pinion
2	-	Fourth gear pinion
3	-	Needle roller bearing
4	-	Fifth gear pinion
5	-	5th gear synchronizer ring
6	-	Synchronizer assembly for fifth and reverse gear
7	-	Retaining ring
8	-	Reverse gear synchronizer ring
9	-	Needle roller bearing
10	-	Reverse gear pinion
11	-	Roller bearing

First and second gear pinions located on the secondary shaft - Vehicles manufactured up to 07.2000.

Pos.	Spare Part No	Name
1	-	Secondary shaft
2	-	Needle roller bearing
3	-	Second gear pinion
4	-	Inner synchronizer ring
5	-	Conical synchronizer ring
6	-	Outer synchronizer ring
7	-	Synchronizer of the first and second gears in assembly
8	-	Retaining ring
9	-	Outer synchronizer ring
10	-	Conical synchronizer ring
11	-	Inner ring of the synchronizer
12	-	Needle roller bearing
13	-	First gear pinion
14	-	Secondary shaft drive gear
15	-	Retaining ring
16	-	Roller bearing

Secondary shaft - Vehicles manufactured from 08.2000 onwards.

Pos.	Spare Part No	Name
1	-	Roller bearing
2	-	Secondary shaft drive gear
3	-	Secondary shaft
4	-	First gear needle roller bearing
5	-	First gear pinion
6	-	Inner ring of the first gear synchronizer
7	-	Conical ring of synchronizer of the first gear
8	-	First gear synchronizer outer ring
9	-	Synchronizer of the first and second gears in assembly
10	-	Retaining ring
11	-	Second gear synchronizer ring
12	-	Second gear conical synchronizer ring
13	-	Second gear synchronizer inner ring
14	-	Second gear pinion
15	-	Second gear needle roller bearing
16	-	Third gear pinion
17	-	Fourth gear pinion
18	-	Retaining ring
19	-	Fifth gear needle roller bearing
20	-	Fifth gear pinion
21	-	5th gear synchronizer ring
22	-	Synchronizer assembly for fifth gear and reverse gear
23	-	Retaining ring
24	-	Reverse gear synchronizer ring
25	-	Reverse gear needle roller bearing
26	-	Reverse gear pinion
27	-	Roller bearing

Gear Selector Mechanism - Vehicles manufactured up to 01.2000.

Pos.	Spare Part No	Name
1	-	Reverse light switch
2	-	Gear selector finger
3	-	Gear Selector Finger Bracket
4	-	Gear selection shaft
5	-	Gear selection lever
6	-	Gear selector housing
7	-	Selection lever
8	-	Shift lever
9	-	Gear selector mechanism cover

Gear Selector Housing - Vehicles manufactured up to 01/2000.

Pos.	Spare Part No	Name
1	-	Gear selector housing
2	-	Guide bracket for the shaft of the shift and selection levers
3	-	Gear selector joint
4	-	Selector lever and selector lever shaft
5	-	Shift lever shaft
6	-	Oil seal
7	-	Needle roller bearing

Gear Selector Link - Vehicles manufactured up to 01.2000.

Pos.	Spare Part No	Name
1	-	Gear selection lever
2	-	Ball bushing of gear selector shaft
3	-	Gear selector finger
4	-	Gear selector pin bracket and shift lock ball