It's not the allen head type, it's the big bolt type. A 15/16th fits on there pretty snugly, but it may just be because of all the caked on dirt. Most everything else is metric, which is why I don't know if 15/16th is the one.

Can anyone confirm the size of the differential drain/fill plug sizes for me? I don't have metric sockets that big. Tranny and transfer if you got them as well.

 

What vehicle? If its a 95.5-2004 Tacoma or a 96-02 4Runner its gonna be a 24mm for both drain/fill plugs for BOTH Transmission (manual) and transfer case. I'm not positive on the Tacoma b/c I dont have one, But for a 4Runner I'm positive. Someone correct me if I'm wrong...

 

Crap! just read yer profile, wrong vehicle, my bad. Someone help the brother out.

 

Yup. 24mm = 15/16"

And you can replace them with the 10mm allen key ones with no problems, they're all the same 18mm thread inside.

Whatever you do, use NEW drainplug gaskets each time you take those things off.

 

You want the low profile magnetic drain plugs.

 

Your giving out bad info. Toyotas are a metric design. DO NOT USE A 15/16 American standard wrench on your trans and trans case filler drain plugs. They are 24mm. Go purchase the correct tools.

 

Edit: The difference between 15/16 in and 24mm is 0.1875 inch. Close enough. 15/16 in = 23.8125mm

 

Can you use the crush washers made for oil changes with the drain plugs or need to get a different washer?

edit: I guess not. I've never done this. 10 for $11.90

http://www.ebay.com/itm/Bag-10-12157-10010-Differential-Plug-Gasket-Genuine-Toyota-Lexus-Scion-/111592502361?pt=Motors_Car_Truck_Parts_Accessories&hash=item19fb6e7459&vxp=mtr

 

You take a worn plug with a 15/16" socket that is of cheaper quality now you have a drain plug with the corners rounded off.

This seems to happen all to often.

I just use a 24mm 6 point socket.

If you can stretch the oil plug gaskets to fit I guess you can use them.

 

Definitely 6 point socket. Like I said, the difference between 15/16 inch and 24mm is negligible. In fact, 15/16 inch is a hair less than 24mm, so it'll be tighter.

 

FWIW I checked the rear end on my '95 yesterday. The fill plug was 23mm(?). The drain was 24mm. Maybe my fill plug size changed a little due to rust? I dunno.

Anyway I wasn't breaking it loose with a breaker bar by hand, so I put a jack under the end of the breaker bar and lifted. Right away I heard the plug break loose - and then it came right out.

 

0.1875 mm (0.007 in)

 

I hate it when people give me a 12 point to use on anything. I hate to use them unless it's absolutely necessary. I actually took what I had collected over the years that I got with kits/packs and stuffed them in the bottom of my tool box that I call the junk drawer.