You can push it in (engaged) anytime stopped or moving forward. You cannot pull it out without lunching everything. Best bet is to wait till you’re at a complete stop, typically at the stop sign at the end of the ramp. When you slow down and fall below about 25 mph, you should feel the o/d drop out and the rpms fall to idle.

Note the comment above about using reverse to park if the handle is in. There’s also a way to wire a drop out switch, and then you can disengage the o/d when moving, but you really have to understand how they work and I’m not going into it here.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

OD in first was never used as I remember with something in the circuit (I believe the governor) keeping it from happening. For us guys who had OD's without all the proper circuits connected could use ours as a 6speed with a toggle switch on the steering wheel. It was fun to go thru 6 gears in the 70's. Anyway I never put any power down in first over. Have fun, I always did.

56 Vic, B'Ville 200 MPH Club Member, So Cal.

You can lock the OD out while moving but it must be kicked down to direct and with a load on it while you pull the handle out. Best to wait until you're at a dead stop.

Thanks for the replies.  I'll drive it around town with the OD engaged on so I can get a feel for how it works.  When parking, I'll put it in reverse.  OD is kind of cool.  Like having two rear end ratios without the work of swapping the pumpkin all the time.