Rear diff filler plug

[MikeDB]

Does anybody know the correct size for the square tool to undo the rear diff fill plug.  I had a universal tool which seemed to be 12mm but it broke under loading so need to buy the correct tool

[JamesJDMwagon]

Isn't it just a half inch ratchet? 

[Mr B]

13mm square, if tight proper decent 13mm plug sockets work way better ...

[JamesJDMwagon]

5 minutes ago, Mr B said:

13mm square, if tight proper decent 13mm plug sockets work way better ...

Isn't 13mm half an inch? 

[Sandals]

14 minutes ago, JamesJDMwagon said:

Isn't 13mm half an inch? 

It is indeed...

[Mr B]

15 hours ago, JamesJDMwagon said:

Isn't 13mm half an inch? 

 

15 hours ago, Sandals said:

It is indeed...

 

Not exactly, it close . . . 26mm is not an inch .

you will find quality 13mm drain wrench sockets a tighter fit & less likely twist out on tight plugs .

 

[Sandals]

13mm is 0.511 inches. Yeh it's not going to be exact as it's a different measurement... but it's near enough to use a half inch ratchet

[MikeDB]

I found the correct tool on eBay and it's just arrived but the diff plug doesn't seem to want to move.  Can somebody confirm it is normally threaded please, i.e. anti-clockwise to undo.

[Mr B]

anticlockwise to undo.

if reel tight be sure plug hole cleaned out so square socket fits deeply so less chance of turning itself out the plug hole .

problem using 1/2 inch ratchet or extensions is tip is tapered & domed so don't get full depth grip plus it slightly too small, works ok until get tight ones, then it rounds the plugs out & I get the job of removing them by welding a bolt into the fooked plug hole .

If don't budge try some gentle heat.

I always refit these plugs with 3 turns of PTFE tape as doesn't weep, no need do murder tight plus it acts as barrier between the 2 differing metals stopping corrosive seizing issues ...

[KlassicSubi]

Hi, is it the same size tool if changing a manual transmission fluid? 

I have an Impreza 1999 GC8.

Thanks