Rear Differiantal drain plug issues.

[Baddog]

I posted this on the legacygt.com forums as well.

So I went out today to tackle the job of replacing the Rear Differential Fluid on my 4EAT.

Got the fill plug out without much effort. (SCORE!) Then I go to the drain plug. Well no luck. It wasn't a socket type plug?. So I used a 1/2"(?) drive ratchet and just stuck it in there (this is what I did on the fill plug as well)

Tons of trying and using a rigged up breaker bar. It started to round out the corners of the square.


https://sl-i.net/FORUM/images/imported/2011/01/IMG00548201101081414-1.jpg


It didn't budge. So anyone got an idea for me? If I get it off I am going to get a replacement (new).

Or I was going to get a siphon tool and open up the fill plug again and drain all the old fluid out. Good or bad idea?

Should also mention that I did try using a torch and penetrating sprays. PB Blaster

I think the previous owner or someone overtorqued the drain plug.

Anyways just need help.

[Airgne]

If you get it out get a new one. Tap it with a hammer when you have the half inch breaker bar attached.

[Baddog]

I tried a hammer as well. I tried a heat gun too. Nothing has worked.

Would it be a bad idea to take the fill plug off and pump the old fluid out?

[Airgne]

It wont hurt to try and suck old out.

[mike-tracy]

If worst comes to worst, you could always swap diff covers. Sucks since you have to drop the diff, but that might be your best option.

[ouch1011]

Sucking the old fluid out would be fine. On some diffs, thats the only way you can do it.

[Matty2Hotty]

I had the same problem... 2 diff ways... 1... Have a impact gun to pop it or 2.... Put your 1/2" rachet on it, use a floor jack to jack up the rachet so it's parallel/flat with pressure on it, then stand in your trunk, and jump, lower the car, reclick the rachet and jump agian... Takes a good 5times to get it loose enough. Actually did #2 before I remembered I had my air gun haha...

[Huffer]

PB Blaster, let it soak for a few hours, then go back to it but first tighten it a little bit, then try to loosen it.

[ouch1011]

I was going to suggest the air impact, but usually you don't want to use impact guns on pieces that go into thin aluminum because it can crack the aluminum. Air impact gun is basically the same effect as hitting the bolt (plug) repeatedly with a hammer.

[Baddog]

I used a siphon pump thing I got at walmart to suck the old stuff out. I will be attempting to replace the drain plug in a few weeks and do a better job of the flush and what not.

[02_Legacy]

If you are going to try it again soon I would suggust frequently soaking it in some prenetrating oil (I swear by liquid wrench, that stuff is amazing) like every day untill you try it. It is amazing how big of a difference it makes.

[ShadowGT]

Propane torch, not a heat gun. Just don't set the car on fire.