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Author Topic: What is the purpose of this hole?  (Read 2494 times)

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Offline Matto

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What is the purpose of this hole?
« on: August 09, 2014, 04:16:41 PM »
I replaced the rear pinion seal today which was leaking pretty badly. As I was cleaning up around the seal before removal, I noticed this hole. It almost looks as if the oil was leaking from there. The hole seems to penetrate the bottom lip of the seal recess. What is the purpose of the hole?
Matt

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Offline 1955CJ-5

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Re: What is the purpose of this hole?
« Reply #1 on: August 09, 2014, 05:17:17 PM »
Good question....you would think that if the hole went through to the differential you would have a continuous leak...

Mine didn't have the hole...

Is it a Dana 44?

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1955 CJ-5, A friend for 58 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...

Offline Matto

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Re: What is the purpose of this hole?
« Reply #2 on: August 10, 2014, 10:22:37 AM »
It is a Dana 44.
 I put the new seal in and took it for a 20 mile ride. I slid some cardboard under and am waiting for the results. ;)
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Offline Matto

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Re: What is the purpose of this hole?
« Reply #3 on: August 14, 2014, 07:28:06 PM »
Pretty big puddle under differential after sitting for a couple days. It definitely seems to be coming from this .125" hole. I'm wondering if this hole was bored during the manufacturing process and then a pin/plug installed which has fallen out? I tapped in a small wooden (Bubba) plug to see if this stops the drip.
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Offline 1955CJ-5

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Re: What is the purpose of this hole?
« Reply #4 on: August 14, 2014, 09:19:20 PM »
Maybe a self-tapping machine screw with lots of Permatex would seal it....

Or maybe you could just tap it and put the appropriate size machine screw in there.....

Weird place for a hole.....
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1955 CJ-5, A friend for 58 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
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