Rear Differential Oil?

[hep2jive]

14 minutes ago, desoto1939 said:

some rear end did not have a drain plug you would take out the fill plug and then insert a suction tube and suction tool to pull out all of the rear end fluid.

 

Some cars also had a drain plug that was on the lower left side near the bottom of the side flange.

 

Just have to look on yours to see what you have.

 

Rich hartung 

Thanks. I guess mine doesn't have one then!

[Sam Buchanan]

12 hours ago, Los_Control said:

Not sure who's rear end you are looking at .....

 

Be careful about who's rear end you are looking at..............................

[Sniper]

6 minutes ago, Sam Buchanan said:

 

Be careful about who's rear end you are looking at..............................

 

My Dad taught me the best thing to do was wear mirrored sunglasses whenever you are inspecting rearends.

[White Spyder]

So, I checked out the rear end of my ‘48, she didn’t mind. More importantly neither did my wife. Here are two photos. The first looking toward the front of the car. There is only one plug. The second is looking toward the rear of the car.  There are two. Which is the drain and which is the fill and why the extra?

[Sniper]

Due to gravity, the top plug in the second picture is the fill, the bottom plug is the drain.  😎

 

The plug in the first picture, no idea.  My 51 doesn't have that one.

[keithb7]

The plug in the first photo must be for the diff lock limited slip additive.  😉

[Sam Buchanan]

16 minutes ago, keithb7 said:

The plug in the first photo must be for the diff lock limited slip additive.  😉

 

Or maybe it's so you can open the diff and let the stale air escape.....................

[Ivan_B]

I am pretty sure the plug on the first photo is the fill... Not sure about the one at the front-right of the casing, though, my diff does not have it 🤔 I would suggest checking the repair manual for this specific car (assuming the differential is OEM).

Edited March 14 by Ivan_B

[Los_Control]

I admit I learned something new yesterday. When op stated there was no drain plug I was wondering if they had a different rear end swapped in ..... because I thought all these old mopars had drain plugs ..... so my pun "somebody else's rear end" came out.

 

Odd that the rear end now being talked about has 2 fill plugs .... makes me wonder if a previous owner has been mixing and matching parts .... taking the pumpkin out of one model and installing it in this model to get better or different gears. .... That could explain two fill plugs.

 

I dunno though, Dodge is pretty strange sometimes ..... I have a Dodge 3.3 V6 that rides around in the back of my chebby all week .... it has 2 drain plugs on the oil pan .... one on each side. I suppose their is a reason for it somewhere .... I do not know what it is.

[DJ194950]

To drain a rear end with no drain - remove one or two of the lowest 3rd. member mounting bolts. They go through into the cavity where the oil is.

 

If all studs remove a stud or two.

 

Get'er done!

 

DJ

[White Spyder]

To respond to some of the above comments. My 48 is original no swapped differential. Does anyone have an idea about the size of the drain plug on the bottom?  None of my ratchet's fit.  

[Los_Control]

Just make one .... it is a square. I used a old head bolt out of the coffee can and ground it down til it would fit with the bench grinder. Took about 5 minute.

 

Then the next time I needed it I could not find it ..... took about 3 minute to make another ...... When I put it away I thought I'm going to put this in the drawer with the wrenches because thats where it belongs ..... I then found the first one in that drawer.

Now I have 2 but it really is to simple, not worth the trouble to try and find and buy the tool.

 

 

 

[soth122003]

I thought my 48 didn't have a drain plug either. until I used a wire brush and a pick. Brushed the lower area of the diff and found the drain plug. Used the pick to clean out the hole, which was a 7/16" square hole. They used to have square hole plug wrenches (like an allen wrench set) ranging from 1/4" to 1/2" SAE. I used a dremel on my plug and sized it to 1/2" so I can use the 1'2" ratchet on it.

 

Here's a link for the plug sets.

https://www.amazon.com/CASOMAN-Pieces-2-Inch-Socket-Female/dp/B09F64XLCW/ref=pd_scr_dp_alt2_d_d_sccl_3_7/143-9413250-4066531?pd_rd_w=027Zs&content-id=amzn1.sym.d27da8b4-737d-43c7-86c4-e59a1ff3f7e1&pf_rd_p=d27da8b4-737d-43c7-86c4-e59a1ff3f7e1&pf_rd_r=M9XQVBZ16F8HBMZVF3EP&pd_rd_wg=ttoqt&pd_rd_r=48123a8d-3e4f-4d5f-8e40-6d0bfc66848a&pd_rd_i=B09F64XLCW&psc=1

 

Joe Lee

 

[Ivan_B]

7 hours ago, soth122003 said:

I thought my 48 didn't have a drain plug either. until I used a wire brush and a pick. . .

They used to have square hole plug wrenches (like an allen wrench set) ranging from 1/4" to 1/2" SAE.

That is funny! And they sure did, I think I still have some in the old tool box.

[desoto1939]

on my original 39 desoto I only have the plug that is shown in the first picture. I will have to also investigate to see if there is a small drain plug on the bottom of my 39 Desoto.

 

Rich Hartung

Desoto1939@aol.com

[Dartgame]

what I've used for square drive plugs is some square key stock from the hardware. Slip it into the 12 point socket that fits it and away we go. works fine.

Edited March 17 by Dartgame