The MG3 Getrag is a 5 speed manual transmission assembly.
Important: Use only DEXRON®III Automatic Transmission Lubricant for this manual
transmission assembly. Other lubricants or additives may affect the shift
performance.
The MG3 Getrag manual transmission has the following features:
| • | First and second gear double coned synchronizer |
| • | Third, fourth, and fifth gear single coned synchronizer |
| • | Three shaft design consisting of an input shaft, output shaft,
and intermediate shaft |
| • | Reverse inhibit feature |
| • | One piece clutch actuator - no bleed screw |
| • | Transmission venting system is part of the fill cap |
| • | First gear ratio is 3.58 |
| • | Second gear ratio is 2.02 |
| • | Third gear ratio is 1.35 |
| • | Fourth gear ratio is 0.98 |
| • | Fifth gear ratio is 0.69 |
| • | Reverse gear ratio is 3.31 |
| • | Final drive ratio is 3.94 |
| • | Vehicle speed sensor (VSS) |
The manual transmission shift cables must be adjusted for proper shifter
performance.
Lubrication Flow
A common sump supplies oil for the manual transaxle. When the manual
transaxle is operating normally, the differential assembly splashes oil from
the sump, to provide lubrication. The splashed oil is collected in an oil
trough. The oil travels down the trough at the case end and lubricates the
input and output shafts. The counter shaft is lubricated from the clutch
housing end through splashed oil from the differential assembly.
Power Flow
Neutral: In neutral, with engine running and clutch
engaged, the input shaft turns. With 1st/2nd, 3rd/4th and 5th/Reverse synchronizers
in a neutral position, power does not flow to the output shaft.
1st Gear: In 1st gear range, the 3rd/4th and 5th/Reverse synchronizers
are in neutral and the 1st/2nd synchronizer sleeve is moved toward the 1st
gear blocking ring and 1st gear on the counter shaft (2). Because
the 1st/2nd synchronizer hub is splined to the counter shaft, torque is transmitted
from the input shaft 1st gear (1) through the counter shaft 1st gear (2),
the synchronizer sleeve and hub, counter shaft 3rd gear (4), output
shaft 3rd gear (9), and into the differential, final drive, assembly.
2nd Gear: In 2nd gear range, the 3rd/4th and 5th/Reverse synchronizers
are in neutral and the 1st/2nd synchronizer sleeve is moved toward the
2nd gear blocking ring and 2nd gear on the counter shaft (3).
Because the 1st/2nd synchronizer hub is splined to the counter shaft, torque
is transmitted from the input shaft 2nd gear (11) through the counter
shaft 2nd gear (3), the synchronizer sleeve and hub, counter shaft
3rd gear (4), output shaft 3rd gear (9), and into the differential,
final drive, assembly.
3rd Gear: In 3rd gear range, the 1st/2nd and 5th/Reverse synchronizers
are in neutral, and the 3rd/4th synchronizer sleeve is moved toward the 3rd
gear blocking ring and 3rd gear on the input shaft (6). Because the
3rd/4th synchronizer hub is splined to the input shaft, torque is transmitted
from the input shaft through the synchronizer hub and sleeve, 3rd drive gear (6),
3rd driven gear (9), the output shaft, and into the differential,
final drive, assembly.
4th Gear: In 4th gear range, the 1st/2nd and 5th/Reverse synchronizers
are in neutral and the 3rd/4th synchronizer sleeve is moved toward the
4th gear blocking ring and 4th gear on the input shaft (7). Because
the 3rd/4th synchronizer hub is splined to the input shaft, torque is transmitted
from the input shaft through the synchronizer hub and sleeve, 4th drive gear (7),
4th driven gear (8), the output shaft, and into the differential,
final drive, assembly.
5th Gear: In 5th gear range, the 1st/2nd and 3rd/4th
synchronizers are in neutral and the 5th/Reverse synchronizer sleeve is moved
toward the 5th gear blocking ring and 5th gear on the output shaft (10).
Because the 5th/Reverse synchronizer hub is splined to the output shaft,
torque is transmitted from the input shaft through the 5th drive gear (5),
5th driven gear (10), the synchronizer sleeve and hub, the output
shaft, and into the differential, final drive, assembly.
Reverse: In reverse range, the 1st/2nd and 3rd/4th synchronizers
are in neutral, and the 5th/Reverse synchronizer sleeve is moved toward the
reverse gear blocking ring and the reverse gear on the output shaft (12).
Because the 5th/Reverse synchronizer hub is splined to the output shaft,
torque is transmitted from the input shaft through the input shaft 1st drive
gear (1), counter shaft 1st gear (2), freewheeling as a reverse
idler, reverse driven gear (12), the synchronizer sleeve and hub,
the output shaft, and into the differential, final drive, assembly.
