R = roadrannger
T = twin countershaft
9 = torque the transmission can handle x100
10 = number of forward gears.
The RT-910 has a 5 speed main gear box and a 2 speed high/low range. This transmission has a 14" clutch and uses a 1 3/4" input shaft. The RT-910 can also be changed to a RTO-910, which is a overdrive transmission, by disassembling the front gear half and changing around some of the gears in the gear box.
Main shaft in the center of the transmission. One countershaft on each side of the main shaft.
This is the air inlet for the transmission. It has an air pressure regulator which limits air pressure to 57-62 psi and an air filter which should be disassembled and cleaned every oil change.
Air valve. The air valve directs air flow to the range shift cylinder for the high/low range. It is controlled by the control valve on the gear selector.
Control valve . Controls the air flow to the air valve for high/low range
shift cylinder. Uses a piston to move a shift fork back and forth for the high/low range. The piston is controlled by air pressure and uses an o-ring to seal it
High/low range shift fork in the rear gear case half
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