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Old 05-30-2020, 05:35 PM   #1
Peanut74
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Filling 1967 Rear Differential

I changed my rear end from six lug to five lug and got it all cleaned up. I am at a point that I would like to fill it. But neither the back cover or diff casting have a plug in it. The only opening into the cast is the vent hole. So the question is what am I missing?

Thought I would ask the question before I start drilling holes in the cover.
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Old 05-30-2020, 05:45 PM   #2
OregonNed
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Re: Filling 1967 Rear Differential

I’m surprised it doesn’t have a square pipe plug in the first pic under that vent hose about half way up.
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Old 05-30-2020, 06:07 PM   #3
Steeveedee
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Re: Filling 1967 Rear Differential

It could also have a pipe plug that takes a 3/8" square drive like a ratchet, maybe even a hex drive.
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Old 05-30-2020, 07:28 PM   #4
jayoldschool
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Re: Filling 1967 Rear Differential

Check the photos in this thread:

http://67-72chevytrucks.com/vboard/s...d.php?t=761957
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Old 05-30-2020, 08:17 PM   #5
hooverfish
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Re: Filling 1967 Rear Differential

Check for pipe plug at tip of RED arrow.
Use 3/8 ratchet with short extension.
You need to fill until it starts weeping out, then its full.
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Old 05-30-2020, 11:15 PM   #6
Peanut74
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Re: Filling 1967 Rear Differential

Found the fill plug, thanks guys. There is a pipe plug between the two casted webs under the diff vent. Glad I didn't drill first and ask this question later.
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Old 05-30-2020, 11:22 PM   #7
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Re: Filling 1967 Rear Differential

Quote:
Originally Posted by Peanut74 View Post
Found the fill plug, thanks guys. There is a pipe plug between the two casted webs under the diff vent. Glad I didn't drill first and ask this question later.
Where's the fun in that!? Then we could have a thread about removing drill shavings from the diff!

Just pulling your chain, bud, I'm glad you got it sorted!
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