1. Manual Transmissions

2. A vehicles transmission allows for torque multiplication (which helps acceleration) and a wider range of vehicle speeds than would be possible if the engine were connected directly to the drive axle.

3. A Manual Transmission has toothed gears that must be selected by the vehicle operator with a lever and connected to the output shaft of the transmission.

5. Manual Trans input shaft and counter gear power flow.

6. Input shaft and counter gear

7. Manual Trans power flow: Neutral
Input shaft
Counter gear

8. Power Flow: First gear

9. Five Speed Transmission: Neutral

11. Shifting rails & forks can be seen in this photo:
Shifting forks
Shift rails

12. Shifter / Rail movements for each gear.

13. View from front of trans

14. Synconizers are needed to help gears rotating at different speeds mesh together without grinding.

15. Synchronizer assembly

16. Syncro collar or hub
Sliding sleeve

17. Synchronizer ring and gear

18. Synchronizer assembly

19. Another small gear is needed to reverse the direction of the output shaft.

20. Typical parts layout

21. Input , counter and 1st,2nd, 3erd gears. Very expensive to replace!

22. Special tools Tools required to work on Manual transmissions:
Snap ring pliers
Pullers
Feeler gauges
Dial indicator
caliper

23. Good luck with unit test!