NOTE: Refer to the Exploded View in the countershaft reassembly, as needed, when removing components pressed onto the countershaft.
Securely clamp the countershaft assembly in a bench vise with wood blocks.
Use a chisel (A) to raise the locknut tab (B) from the groove in the countershaft.

Remove the locknut (left-hand threads) (A) and the spring washer (B).

Support 5th gear (A) on steel blocks (B), then use a press (C) and an attachment (D) to press the countershaft (E) out of the bearings (F).

Support 4th gear (A) on steel blocks (B), then use a press (C) and an attachment (D) to press the countershaft (E) out of 4th gear.

Support 3rd gear (A) on steel blocks (B), then use a press (C) and an attachment (D) to press the countershaft (E) out of 3rd gear.

Transmission Range Switch Replacement (A/T)
Raise the vehicle on a lift, or apply the parking brake, block the rear
wheels, and raise the front of the vehicle. Make sure it is securely
supported.
Shift to N.
...
Breather Line and Suction Line Inspection (Page-1)
Special Tools Required
Fuel Pressure Gauge Attachment Set 07AAJ-S6MA150
Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially
available
Vacuum/Pressure Gauge, 0-4 inHg 07 ...
List of Categories
* Stored in “Fav. Subcategory” by factory default. ...