Input Gear, Output Shaft and Shifter Fork

INPUT GEAR

The helical input gear is in constant mesh with the helical gear of the transmission reverse idler gear and is therefore in constant rotation when the engine is engaged. The input gear is installed on a nonrotating input gearshaft and is mounted on the input gear roller bearings. The shaft is pressed into the housing and secured with a cotter pin. A thrust washer is located at each end of the input gear. The helical-tooth portion of the input gear is in constant mesh with the reverse gear which is installed on the reverse gearshaft and secured with the reverse gear pin. The reverse gearshaft rotates in two supporting roller bearings.

OUTPUT SHAFT
The output shaft is supported in the housing on two ball bearings. Two gears are installed on the output shaft. One is the output shaft sliding gear which is moved forward and backward on the shaft by the shifter fork. The other is the output shaft high-speed gear which is free on the output shaft and is in constant mesh with the input gear. The sliding gear is splined to the output shaft and may mesh with the reverse gear spur teeth, with the spur teeth on the input gear for low-speed operation, or it may act as a clutch gear to couple the output shaft high-speed gear to the output shaft.

SHIFTER FORK
The shifter fork is attached to the shifter shaft by means of a cap screw. The fork engages the circumferential groove on the sliding gear.

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Article Pages
1. Drive Train Intro
2. Principles Of Torque
3. Fundamentals Of Gears
4. Types Of Gears
5. Gear Principles
6. Principle Of Gear Ratios
7. Principle Of Torque Ratios
8. Operation Of A Gear Train
9. The Construction And Operation Of A Planetary Gearset
10. Operating Principles Of A Planetary Gearset
11. Why Clutches Are Needed
12. Clutch Construction
13. Types Of Clutches
14. Clutch Operation
15. Clutch Maintenance
16. Introduction To Manual Transmissions
17. Types Of Manual Transmissions
18. Manual Transmission Construction
19. Manual Transmission Operation
20. The Powerflow In Manual Transmissions
21. Manual Transmission Lubrication
22. Manual Transmission Ventilation
23. Constant Mesh Transmissions
24. Synchromesh Transmissions
25. Power Take-Offs
26. Power Take-Offs Construction And Operation
27. Input Gear, Output Shaft and Shifter Fork
28. Inspecting The Transmission
29. Leaking Lubricants In A Manual Transmission
30. Leaking Seals In A Manual Transmission
31. Testing Transmissions For Malfunctions
32. Power Take-Off Inspecting And Testing
33. Automatic Transmission Introduction
34. Automatic Transmission Fundamentals
35. Drive Train Mechanisms
36. Drive Train Operation
37. The Drive Train Arrangements Of The Automatic Transmission
38. Simpson Drive Train
39. Hydraulic System Of The Automatic Transmission
40. Hydraulic Supply System
41. Torque Converter Feed Circuit
42. Range Control System
43. Vehicle Speed Versus Engine Loading
44. Transfer Case
45. Transfer Operation
46. The Construction And Operation Of Sprag Units

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