Transmission Overhaul Procedures-Bench Service Transmission Overhaul Procedures-Bench Service
How to Install the Mainshaft Assembly Special Instructions None
Special Tools •
Main Shaft Hook Tool T20 (see Table 6)
Procedure 1.
Move the countershaft forward as far as possible and block it to the side by inserting a large screwdriver or prybar between the main drive gear and the countershaft. Note: Make sure the input shaft is pulled forward before positioning the mainshaft.
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2.
Hold the reverse gear against the next gear, and lower the mainshaft assembly into position while guiding the shaft rear through the case bore. A mainshaft hook (Tool ref. ID T20) or piece of rope can be used to hold on to the mainshaft.
3.
Move the mainshaft forward to position the mainshaft pilot end into the rear of the input shaft.
4.
Install the reverse idler bearing and inner race into the reverse idler gear, and place the gear in its approximate location. Rest it against the case wall, but do not install the reverse idler shaft yet.
5.
Slide the mainshaft reverse gear rearward.
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