Author Topic: fill plug on rear diff stuck  (Read 4823 times)

Offline rusty but trusty

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fill plug on rear diff stuck
« on: May 11, 2012, 07:35:54 PM »
OK i rely wished i had checked this before i drained the gear oil but i didn't and have the pan back on and everything and went to loosen the bolt and could not any advice
87 GMC V1500 305 700R4 NP208 and 10 bolts front and rear

Offline VileZambonie

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Re: fill plug on rear diff stuck
« Reply #1 on: May 11, 2012, 08:00:27 PM »
Why not? Make sure it's clean and put the drive all the way in. Put a little muscle into it
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Offline Lt.Del

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Re: fill plug on rear diff stuck
« Reply #2 on: May 11, 2012, 10:49:57 PM »
put a 1/2" drive ratchet directly in the square slot.  No sockets or anything. Put a pipe over the handle for extra leverage or use a hammer and wack it a few times ensure you're are going counter clockwise with it.  It'll come out.
If not, time for a propane torch to warm it up, then repeat.  Don't go too crazy w/ the propane torch, differential oil is oil after all.

Offline Fairlane514

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Re: fill plug on rear diff stuck
« Reply #3 on: May 11, 2012, 11:26:48 PM »
How about some PB Blaster on it and let it soak in for a little bit.

Offline thirsty

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Re: fill plug on rear diff stuck
« Reply #4 on: May 12, 2012, 07:36:50 AM »
I had one that was rounded off and couldn't get anything into it solid enough to turn it out. I ended up welding a bolt into it and it came right out. I replaced it with a square plug so I could use an eight point socket on it next time.
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Offline Blazin

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Re: fill plug on rear diff stuck
« Reply #5 on: May 12, 2012, 07:55:38 AM »
Give it a good swat or two with a hammer. Spray it with weasel pee, and let it soak for an hour or so wont hurt. Use a ratchet or breaker bar directly on it. Heat around it with a torch if you have to. Heating it plenty hot wont hurt it.
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Offline VileZambonie

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Re: fill plug on rear diff stuck
« Reply #6 on: May 12, 2012, 08:23:06 AM »
It is 3/8" drive. You are better of with leverage over anything else. You can easily strip it out if you are not in there all the way. http://www.stanleyproto.com/default.asp?TYPE=CATEGORY&CATEGORY=J9500B&strSiteName=PROTO&strDefaultCatalog=PROTO these work great for removing stripped plugs
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline rusty but trusty

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Re: fill plug on rear diff stuck
« Reply #7 on: May 23, 2012, 08:44:36 PM »
thanks guys the heat and weasel pee did the trick
87 GMC V1500 305 700R4 NP208 and 10 bolts front and rear