Tranny and Tr.Case oil levels

[Andrew]

On a late 1949 CJ3A with 3 spd. tranny , how much G-4 oil is needed for each the Tranny and Tr.Case,  which have individual filler and drain plugs? These cases are reconditioned units, completely empty.

[Rus Curtis]

Andrew,
Have you checked your Service Manual (SM)?

In Section B, there are lubrication charts that list capacities.  The 2-A/3-A list 3.5 pts.  The 3-B/ 5/ 6 list 6.5 pts.  Seems like a big difference (wondering if the 2A/3A listing is meant for each).  Nearly every vehicle I've topped off (or the only one I filled from empty) I've verified watching the filler hole and using my finger.

I purchased a pump for outboard engines that screw on to any quart bottle:

https://www.cabelas.com/p/bass-pro-shops-fluid-pump-and-lower-unit-gear-lube-combo?ds_e=MICROSOFT&ds_c=Cabelas%7CShopping%7CPMax%7CProprietary%7CGeneral%7CNAud%7CMSFT%7CNMT&msclkid=aa877b34aa831cb3187113fb57deedb5&gclid=aa877b34aa831cb3187113fb57deedb5&gclsrc=3p.ds&gad_source=7&gad_campaignid=22483857013

https://www.walmart.com/ip/Quicksilver-8M0072133-Gear-Lube-Pump-Fits-One-Qt-or-One-Liter-Bottles/17165291

And I just repurposed an empty engine oil bottle to transfer my gear oil into.  I jamb and twist the plastic end so it will sit inside the filler port and pump until I see oil come out of the hole (I'm not really concerned with how much, just that it's full - which is what every garage will do too).

I know you wanted a quick answer but not knowing if you're adding from the top (shifter removed on transmission) or crawling under to add, I thought I'd turn this into a novel to add technique - in case.  If you do overfill, the transfer case will spew out the breather on top, when you go for a drive, and give your jeep a good coating.  I think I understand correctly that the early gear boxes did not share the lube.  The later versions had a flow-through port where the lubricant would move between the transmission and transfer case.  Here's a handy link from the CJ3A Info Page to explain the later version:

https://cj3a.info/tech/fluid.html

I'd recommend, since empty, filling both individually up to the fill plugs.  I've consolidated using GL-4 in axles, gearboxes, steering box (per the SM) to simplify my storage.  You'll want more than you need to top off later anyways.


Another handy reference is this Universal Check Chart:

[Andrew]

Ron: Many thanks for your write-up on this. I've filled both, first Tr.Case and then Tranns, both up to overflow level on the respective filler plugs. Tr.Case at 55 oz. and Tranny 40oz.Thats just an ounce short of 6 pints total.
        I've lost my notes on how to place a new forum question:give me the steps to follow to do this,please.

[Rus Curtis]

        I've lost my notes on how to place a new forum question:give me the steps to follow to do this,please.

Dang Andrew!  Looks like you figured out how to post a new topic/question (referencing all your new posts)!  Well done.


Now that your gear boxes are filled, it will be easier to keep them topped off.  My technique is to use a "marine" pump that screws into a qt. sized bottle.  I keep an empty bottle from an oil change and just keep using that.  When needed I fill it up from the gal. jug of gear oil.

This is the pump I bought and is real easy for me. 

https://www.walmart.com/ip/Quicksilver-8M0072133-Gear-Lube-Pump-Fits-One-Qt-or-One-Liter-Bottles/17165291?wmlspartner=wlpa&selectedSellerId=101229190&adid=22222222222000000000&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=10352200394&wl4=pla-1103028060075&wl5=78545&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=17165291_10001248550&wl14=quicksilver%20marine%20pump%20walmart&veh=sem&msclkid=c83ee6f4fe24165e5d458e11f99faf10&gclid=c83ee6f4fe24165e5d458e11f99faf10&gclsrc=3p.ds