1966 12 bolt rear end in a 70 - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

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post #1 of 7 (permalink) Old Aug 14th, 19, 8:41 PM Thread Starter
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Keith
 
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1966 12 bolt rear end in a 70

I have a chance to pick up a 12 bolt out of a 66, question is besides being 1 inch narrower than my 70 10 bolt, what is the deal with the spring perch, I’m looking at the 66’s pics and it looks exactly like what I have, also are there any differences in any of the bolt in points on the control arms.
Thanks,
Keith
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post #2 of 7 (permalink) Old Aug 14th, 19, 9:39 PM
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Randy
 
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Re: 1966 12 bolt rear end in a 70

The control arm mounting points are the same. Use your original control arms. 66 spring perches are flat with bolt in washers versus the raised perches on your 10 bolt. The width difference may cause wheel issues dependent on backspacing.

Randy
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post #3 of 7 (permalink) Old Aug 14th, 19, 11:08 PM
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Re: 1966 12 bolt rear end in a 70

Did you measure the width? If the spring perches are the same there is a chance its 67 or 68-72, which are much more common. These cars are 50+ years old, always verify what you are buying before exchanging the money.

Good luck, I hope your deal goes smoothly.

Steve R
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post #4 of 7 (permalink) Old Aug 15th, 19, 12:05 AM
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Re: 1966 12 bolt rear end in a 70

the 66 perch should be flat. it wont have a bump on it, theres a ate that bolts on the plate pinching the spring. jim

Jim

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post #5 of 7 (permalink) Old Aug 15th, 19, 10:38 AM
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Randy
 
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Re: 1966 12 bolt rear end in a 70

If it is the narrower rear end and the spring perches have bumps, it's got to be a 67 rear. This is a one year only item and can be worth more than your average 12 bolt.

Randy
TC # 5401
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post #6 of 7 (permalink) Old Aug 15th, 19, 6:55 PM
 
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Like this score - 67 CF code
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post #7 of 7 (permalink) Old Aug 15th, 19, 8:24 PM Thread Starter
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Keith
 
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Well after asking the seller to send me any pics of numbers on the housing, he sent me back 3969278, which happens to be for a 70-72. So I’m definitely jumping on this one
Thanks for all the help,
Keith
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