Was Overdrive An Option In '62?

Still learning about my '62 CJ5 - what it started as and what was done to it.
From day one, I learned that the Dauntless wasn't original.
Today, I was wondering if the transmission/drivetrain could be original or not. What was the trans that paired with the Hurricane and would it bolt up to the Dauntless?
Also, my Jeep has overdrive. Was overdrive an option in '62? My hunch says no, b/c it looks like the floor had to be cut to make room for the extra shifter. Pardon my ignorance, but is overdrive integral to the transmission, or is it a separate component that can be added?
And now for the really dumb question:
Since it's been a few years since I was 4 wheeling with this Jeep and I've only been tooling around town recently, I have a pretty good guess, but I forget what shifts what..to the right of the trans??

 

Overdrive has been a bolt-on option for a long time. Mounts on the rear of the transfer case, not the transmission (at least on the f-heads.)

Not certain when it was first available, but in the Sixties for sure.

 

Shifter #3 is 2WD/4WD. forward position is 2wd, rear position is 4wd. Shifter #4 in forward position, is Lo range, rear position is Hi range

 

#2 is your overdrive. Forward position is overdrive, rear position is direct drive.

 

The stock 3 speed in a 62 is a T90. It's easily adapted to the Dauntless. If your 1st gear is unsynchronized, it's a T90.
The OD wasn't a factory option, but is a common add on.
4 shifters

 

Yes, an aftermarket accessory. An overdrive could be installed by the dealership at the time of sale, and included in the financing. Or the could have been installed later by the dealer, or by the owner. Same with Warn hubs and roll bars and can racks. They would not have come with the Jeep from the factory.

 

Thanks for the insightful replies! Now I know 5x more about my Jeep's drivetrain than I did 48 hours ago.
1st gear is unsychronized and it reminds me every so often
Got to get one of those factory shift plaques. It's probably on my factory dash, but that's still in AZ.....

 

The 1962 Jeep Service Standards mandated T90 A transmission along with 5.38 differential ratios.

No, the Warn O.D. unit was not a factory option in 1962.
It was approved by Kaiser Jeep corporation in 1964.

 

It's so cool that you have that info. When I registered on this site, I wasn't sure how much info. I'd get or how knowledgeable and helpful the group would be. I'm pleasantly surprised at the depth of knowledge and helpfulness of the
members enthusiasts here.

 

Interesting. So it became "Jeep Approved Special Equipment" in 1964. The letter wording indicates it came through the dealer parts network in the special packaging with "Jeep Approved Special Equipment" on it, and was to be installed by the dealership. The only change would the method of purchase for the dealerships, and the implicit guarantee of suitability that came along with "Approved" equipment.

There were some items of special equipment that you could order from the factory - tops and winches for example. My personal experience with such issues was no earlier than 1972, and the dealership I hung around and eventually worked for did not order such equipment from the factory, even when available. The bolt-on equipment like winches were too much of a theft risk in transit, and the factory did a sloppy job of installing tops.