Fluid for antique car transmission

Can you tell us what the make and model of the vehicle is? We are going to have to research the vehicle in order to find the info about it. They did not publish information based on a transmission. It was based on the vehicle and then you can dig further from there. Also, is this the original transmission? At least is this the same type of transmission that came in the vehicle even if it is not the actual unit that came in the vehicle as long as it has been altered over the years. Thanks

Okay, thanks. This is going to take a little research. I have sent some emails to some other guys that have owned some older vehicles like this to get their input as well. I will hopefully have some good info by tomorrow. I just wanted to update you where we are.

My 1946 CJ2A Jeep (3rd row #4), a near "cousin" of a Bantam BRC-40 (2nd row#2). (pic 1 below)

The Bantam BRC pilot car is the 1st ancestor for all Jeeps. Bantam was a struggling car company and the pilot car was going to be their savior when it was the only submission for a government contract for a scout type vehicle. There's a lot more to the story! (You could probably tell us)

Back then in the 1940's manual transmissions used 90Wt. gear oil.

I also looked up gear oil for a 1938 Bantam Roadster on the net, It used 90 wt. in it's transmission. I'd feel confident with that!

I used the same in my 1977 CJ-5 (also in my previous five CJ-5s too!)

20 some odd years ago, 90 Wt. was a real common thing to find at an auto parts store and even in Walmart.

Now days you have to search for it if that is your desire, or you can use Use 80w-90 GL5 as a substitute. This is what I use in both of my Jeeps.

A few months back I was unable to find Use 80w-90 GL5 on the shelf at Walmart at 2 A.M. to help a friend out in an "emergency" by his standards!

We found this, a little pricey (as packaged/advertised for boat motor gears), but it is 90 wt and if it had been in a plain Jane container it would be much cheaper! My friend bought 3! See link below:

https://www.walmart.com/ip/Mercury-92-858064K01-Marine-SAE-90-High-Performance-Gear-Lube-1-quart/54188322

Pouring this stuff from whatever container you get into a cleaned out gallon antifreeze jug and then purchasing a cheap pump from an auto parts store (maybe $7.00) will let you fill up without making a mess!

Send us a picture of your rig, let us know how things turn out.

The Medic

I made you a pic in "MS Paint". See pic below.

Does this make it better to understand?

The fill plug on any manual transmission might be on either side, about halfway up.

Most also have a drain plug either way down low on a side or down on the bottom side. Some even have a magnet made into the drain plug to catch any wear metal shavings so they don't circulate in the transmission.

Purple power (sometimes with a little brushing) and a garden hose sprayer will clean that grease off fast and easy and make it look really good! The ole time regular kind works just fine too.

Send us a pic of your project!

The Medic

Okay,

I was out when you posted before.

Gearboxes (transmissions) are not filled up nearer to the top due to fluid expansion and possibly "bogging" the gear movement down. The fluid gets slung by the gears to where it needs to go.

The fill for the rear probably works the same way, around halfway up will be the fill plug.

Keep us posted!

The Medic