C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Differential problems

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Old May 3, 2006 | 03:15 PM
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Default Differential problems

I changed the diff oil in my 88 and added 1 bottle of anti-slip additive. How do I know it is enough. If it is not enough is there chattering or squealing or does the diff just drop out if it burns up
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Old May 3, 2006 | 03:48 PM
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Not sure I understand the question. But if it is how to tell if the diff is full, it is full when oil starts to run back out the fill hole. Is that what you meant?
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Old May 3, 2006 | 03:51 PM
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4 oz (1 bottle) of Limited slip additive is fine, although 8 oz is recommended.

Of course, pour that in first then top off with gear oil.


I dunno about symptoms. But the LSD clutches should last for the life of the car.
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Old May 3, 2006 | 05:11 PM
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2, 4oz bottles of the friction modifier works best......put in first, then fill the rest of the way (preferably with synthetic like mobil one gear lube) untill it starts to come out a little and thats it ........Joe
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Old May 3, 2006 | 05:12 PM
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Old May 3, 2006 | 05:48 PM
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Sorry for not being more clear. I did add the oil and additive to the top of the fill hole so I know it is full. I was just trying to find out if there was enough additive and what the sypmtoms would be if there was not enough.
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Old May 3, 2006 | 05:59 PM
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I did add the oil and additive to the top of the fill hole

Dang you are good. I could never fill mine past the BOTTOM of the fill hole.
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Old May 3, 2006 | 08:49 PM
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Old May 3, 2006 | 08:51 PM
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Originally Posted by aminnich
I did add the oil and additive to the top of the fill hole

Dang you are good. I could never fill mine past the BOTTOM of the fill hole.
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Old May 4, 2006 | 01:47 PM
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I actually did get it to the top of the fill hole but then it all ran out.
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