Control arm connects to the axle - Impala Tech
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post #1 of 7 (permalink) Old 08-29-2019, 04:19 PM Thread Starter
 
 
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Control arm connects to the axle

What's my best plan here? Should I patch and weld? Can I buy a replacement bracket to weld to axle? I really would rather not replace rear end.
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Impala 66
Dennis Bouvier is offline  
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post #2 of 7 (permalink) Old 08-29-2019, 05:55 PM
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You have some serious corrosion issues. The tube is a stressed member of your suspension with pits and holes that deep (the tube is only 3/16th inch thick) I would worry about structural failure. You can buy a nre Pan Hard br mount, but I would be more worried about the rear end.

Just Google fully welded rear end, and broken plug welds to see how much stress is on the rear end.

Big Dave
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post #3 of 7 (permalink) Old 08-30-2019, 09:09 AM
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Agree. With all those pits, I would be looking to change the whole rear and any effective parts related to it.

-Parting Out over 75 '58 to '73 Full Size Chevy Cars-

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post #4 of 7 (permalink) Old 08-30-2019, 09:29 AM
BA.
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Agree that is shockingly pitted.

I've never seen a replacement control-arm mounting bracket so I think you'd have to have one cut and welded in place. Actually, that may be the easy part just getting metal from Lowes/Home Depot and a air-tool grinder.
The harder thing might be welding to that rear-end and NOT blowing a hole through the pitted, thin axle tube. If you have a low performance motor and an automatic, you may be able to get away with just that bracket replacement. Still some risk in that though as they already noted.

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
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post #5 of 7 (permalink) Old 09-01-2019, 07:12 PM Thread Starter
 
 
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Well, guess it's time to look around for a "used, but better than what I got" rear end. It is the weakest link in my setup, tranny is good, engine is good, it's a 350 out of 78 Camaro.
From quick shopping around, I see more 12 bolts than 10 bolts. I have a 10 bolt 8.2 in there now, if I got a 12 bolt, would I have to upgrade drive shaft as well?

Impala 66
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post #6 of 7 (permalink) Old 09-01-2019, 07:50 PM
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Just make sure it's not a truck 12 bolt. They're cheap and easy to find... and they're too big for your car.

Two doors, four doors, wagons, and ragtops.
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post #7 of 7 (permalink) Old 09-02-2019, 09:51 AM
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Same driveshaft. Same everything other than the 12-Bolt itself. Has to be from a B-Body Chevy though for a direct and correct bolt-in. A '65-'70 Rear will fit your '66. They are a little hard to find and a little pricey as well. A 10-Bolt would be cheaper and easier to find and also remember the Ratios can be different which ever one you decide on.

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