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68' Differential mount question

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Old Jan 3, 2019 | 01:00 PM
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Default 68' Differential mount question

Good afternoon all .....

When i look underneath my 1968 corvette it appears to be missing 4 nuts and washers mounting it to the cross member.

I included a pic so you can see what i am looking at...

Here's the question --- are the hole threaded and the bolts tightened into the threads or are there supposed to be nuts and washers holding it in ....

Thanks in advance

-Mike-
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Old Jan 3, 2019 | 01:07 PM
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No nuts; the bolts thread directly into the diff cover.
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Old Jan 3, 2019 | 01:11 PM
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Awesome …. Thanks for the quick response here ….

Mike

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Old Jan 4, 2019 | 06:47 AM
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Originally Posted by Mike Fricker
Good afternoon all .....

When i look underneath my 1968 corvette it appears to be missing 4 nuts and washers mounting it to the cross member.

I included a pic so you can see what i am looking at...

Here's the question --- are the hole threaded and the bolts tightened into the threads or are there supposed to be nuts and washers holding it in ....

Thanks in advance

-Mike-
is that your differential? thats really clean and in great shape.....I had used rear end in that sentence but it didnt sound right.....
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Old Jan 4, 2019 | 10:00 AM
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That is in fact the "REAR" … LOL

427 Cu in (on a stand) .. in the car is a 468 Cu in LS6 Heads, Winters Foundry intake , Custom Roller camshaft, ,,750 Demon … Muncie M22 … Wife drives the 79 Z28 pictured as well …


Last edited by Mike Fricker; Jan 4, 2019 at 10:05 AM.
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Old Jan 5, 2019 | 06:05 PM
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At least you have a heavy duty replacement rear end cover already installed. The original GM one's would crack off at the lower spring mounting bolt holes. Lou.
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Old Jan 6, 2019 | 10:27 AM
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Thanks for the info on the rear cover … that was something I did not know about ….
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Old Jan 6, 2019 | 05:11 PM
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I belonged to Corvette Cleveland Corvette club at the time and never heard a word about this. I was divorced and stopped at a night club one Saturday night and I met a fellow C-3 Corvette owner.
He told me how his had cracked and I wandered out to the parking lot and crawled under my car and sure enough, mine was cracked! I couldn't believe it. He told me who replaced his cover and I had mine changed.
At the time, my 68 coupe was my daily driver for 4 1/2 years....46 years I have owned it now. Lou.
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Old Jan 6, 2019 | 07:44 PM
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Thanks loup68 ---- 46 YEARS of ownership ,,,, That's awesome.
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Old Jan 6, 2019 | 11:41 PM
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If you ever replace the spring or tighten up those bolts, the bolts should never be torqued unless the full weight of the car is on the wheels and spring. If you tighten the bolts with the rear off the ground and the spring not compressed fully against the cover you can break the mount ears.

Last edited by CanadaGrant; Jan 6, 2019 at 11:49 PM.
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Old Jan 7, 2019 | 09:46 AM
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Originally Posted by Mike Fricker
Thanks for the info on the rear cover … that was something I did not know about ….
Mike, you have a beautiful Corvette, but get rid of the rubber fuel hose....don't want to see it go up in flames.
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Old Jan 7, 2019 | 09:47 AM
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I can absolutely see how that could happen CanadaGrant… in my case the springs and entire suspension were already done when I got the car.

Thanks for the response here …

Mike

Last edited by Mike Fricker; Jan 7, 2019 at 09:50 AM.
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Old Jan 7, 2019 | 09:49 AM
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Good call 71 Green 454 ,,, I am in the process of replacing the gas tank and sending unit so I will DEFINITELY replace the hoses as well ….

Thanks

-Mike

Last edited by Mike Fricker; Jan 7, 2019 at 09:51 AM.
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