July 5, 20169 yr 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
July 5, 20169 yr 5 minutes ago, Mr B said: 13mm square, if tight proper decent 13mm plug sockets work way better ... Isn't 13mm half an inch?
July 6, 20169 yr 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 .
July 6, 20169 yr 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
July 18, 20169 yr Author 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.
July 19, 20169 yr 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 ...
June 8, 20178 yr Hi, is it the same size tool if changing a manual transmission fluid? I have an Impreza 1999 GC8. Thanks
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