How to ID a Transmission?

Hi,

I have a 1600 '65 4x4 Loadstar and a 1700 '69 2wd Loadstar with 304 and 392 sv V8's.

The question is concerning the trans in the 1700 truck. Unfortunately no Line Setting Ticket is available from the Wisconsin Historical Society for my 1700 truck. And the sales brochure of that time lists 6 different 5 speed manual transmissions available for my 1700 truck - T-35 ; T-36 ; T-54 ; T-57 ; T-68 and T-88 along with two different 4 speeds and 3 different Allisons. How can I tell which 5 speed I have and generally what are their internal differences?
And do they all use the same gear oil?
Would the GVW of the truck and the fact it was built as a fire truck in Canada and choice of rear axle have any effect on the choice of 5 speed installed in the truck by the factory?
The clutch setups are also very different. And I would not know how to ID the rear axle, other than its a 7.17 ratio, single speed, and very large compared to my 1600 Loadstar.

The shift pattern is the following:
1 - 2 - 4
R - 3 - 5

Here is all the info attached to the truck:
International Harvester Company
of Canada LTD
Hamilton, Ontario
Model 1700 Serial No. 416070C046897 W.B. 169
Cert. Net. H.P. 217.5 at R.P.M. 3600 Cert. Gr. H.P. 235.6 at R.P.M. 4000
Max. G.V.W. Lbs. 24000

That's everything I know that might relate to the transmission. Is it possible to ID this transmission? I believe it also had a band type of parking brake that has been removed. (Eventually I'd like to get a pto for this transmission for a winch, and to replace the parking brake, neither of which I can do until I know what I have ... unless the pto's and band brakes are the same for all IH 5 speeds).

Any insights or suggestions from anyone would be appreciated.
Thank you.

Any have this shift pattern?

But seriously, that it a common shift patter for a direct 5 spd. It would be the same as in my K's if my K's were direct. I don't think you'll I'd it that way. Look for casting numbers or take some pictures.
As to lube, it is hard to go wrong with SAE 50 or 40 engine oil. There were some trans that called for 10w-40. More things are ruined by not enough lube than the wrong lube.

Constellation SHIFTUS.

But seriously, that it a common shift patter for a direct 5 spd. It would be the same as in my K's if my K's were direct. I don't think you'll I'd it that way. Look for casting numbers or take some pictures.
As to lube, it is hard to go wrong with SAE 50 or 40 engine oil. There were some trans that called for 10w-40. More things are ruined by not enough lube than the wrong lube.

I'll try to get some pictures this weekend.
Thank you.

if you cant see any model number cast into the case, you could look in different part manuals and compare how the outside looks with the pictures of different transmissions (location/number of plugs, bolt holes, shape of shifter cover, etc) to see if it matches a particular model to give you an idea

maybe start here (not my site)
https://app.box.com/shared/otkihx6yoa