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77 Rear end growl when backing in reverse

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Old 07-24-2017, 10:27 AM   #21  
resdoggie
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When you go for a spin do a couple of figure 8's in an open area. This will work the clutches.
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Old 07-24-2017, 10:34 AM   #22  
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When you go for a spin do a couple of figure 8's in an open area. This will work the clutches.
Will do. After reading several other posts, I decided to put two bottles of the limited slip oil in instead of just the one. Then I was able to add about 1 3/4 quarts of the GM gear lube in as well, so I believe I got as much of the old oil out as possible sucking it out. That is some nasty smelly stuff !! Hopefully I'm good in that department for a while now.
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Old 07-24-2017, 10:36 AM   #23  
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Your refill quantity sounds right. Let us know how it works out.
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Old 07-24-2017, 11:00 AM   #24  
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Your refill quantity sounds right. Let us know how it works out.
10-4. Will do.

thanks again for the help and guidance.
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Old 07-24-2017, 04:09 PM   #25  
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I hope your fluid change does the trick. It's a little easier than working on the parking brake.
Just don't put your wife's turkey baster back in the draw. She might know somethings up by the smell.
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Old 07-24-2017, 04:14 PM   #26  
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I hope your fluid change does the trick. It's a little easier than working on the parking brake.
Just don't put your wife's turkey baster back in the draw. She might know somethings up by the smell.
She wouldn't give up her turkey baster............she made me go buy my own. I don't think she trusts me.
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Old 08-14-2017, 05:04 PM   #27  
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Just wanted to circle back around and give a quick update. I finally had a chance to get the vette out for a spin for the first time since changing the diff fluids and adding the limited slip additive. Seems to have totally solved the problem. I did not hear the noise at all. Thanks for all the advice and guidance guys
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Old 08-14-2017, 08:45 PM   #28  
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In the future, its two of the large bottles of GM lube and one small bottle of GM posi additive. Synthetics are fine for modern internals or rebuilds but I would stay away from synthetics with your old gaskets and seals. With the rear up on ramps the plug can be removed with a 5/8 open end wrench, carefully. No need to do figure 8s. To mix the bottles, everything goes into a clean small painters bucket. Stir, then pour contents into one of those clear squeeze bottles found at food vendor suppliers. Refill bottle when needed and label whats in there.
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Old 08-15-2017, 01:15 PM   #29  
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In the future, its two of the large bottles of GM lube and one small bottle of GM posi additive. Synthetics are fine for modern internals or rebuilds but I would stay away from synthetics with your old gaskets and seals. With the rear up on ramps the plug can be removed with a 5/8 open end wrench, carefully. No need to do figure 8s. To mix the bottles, everything goes into a clean small painters bucket. Stir, then pour contents into one of those clear squeeze bottles found at food vendor suppliers. Refill bottle when needed and label whats in there.

Good idea on the mixing and labeling what's left.

I'm wondering, how many miles before the next drain and refill is required? I probably put less than 500 miles on this car per year so I am guessing I'm good for a long time, unless it's more of a timing thing vs mileage driven.
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Old 08-15-2017, 06:52 PM   #30  
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Your good for 20 years.
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