Re: R-9 overdrive cut in/out

Posted by Tim Cole On 2012/3/19 19:01:52

The manual is a little obtuse but what it says is:

a) there are two ways to disengage the overdrive

1) floorboard the accelerator (kickdown)

OR

2) pull the lock out handle (elsewhere it says to momentarily depress the clutch)

Method 2 will lock out the overrunning clutch and allow engine braking. I recall having just pulled the handle out (at low speeds) with no ill effects on units I overhauled

You really need to be able to function this way to avoid runaway brake fade.