I believe that only in the later years (74 or 75 on?) were you restricted to
4th in o.d. The o.d. drops the ratio in 3rd just like it does in 4th, by
about 20%. It's handy when cruising between 45 and 55 as it puts you in a
better power position so you don't lug the engine when going up a hill. My
72 pulls a hill pretty well in 4th at 45 to 55 but 3rd and od would be
better if I needed to pass someone quickly. Now I need to down shift to 3rd
to quickly move around a car. If I had od, I would probably put on the od
instead of going to 4th gear when on a hilly road in that speed range. When
I bought my 72 (in Jan. 1972) I decided against getting an overdrive. My
thinking at the time was that it was just something that could break. I
didn't know how strong the od in the lbc's was at the time. Live and learn
as they say.
Dave 72 B
From: Scott Regel <SRegel@dpra.com>
To: email@example.com <firstname.lastname@example.org>
Date: Tuesday, August 08, 2000 8:53 AM
Subject: OD in 3rd gear?
I've been reading the e-mails about OD and noticed on more than one occasion
that using OD in 3rd gear was a possibility. OD is new to me in my 76B
having the two 63 B's without it. Can you use OD in 3rd gear and why?
you not use 4th gear at all...if you are using OD in 3rd? Sorry, I just
never thought about it.
Also a second question. I was cruising about 45 - 50 mph last night and
engaged the OD going up a slight hill. The OD did not engage until I got to
the top. Should I be concerned or is my car getting lazy?