Changing Fluid in Rear End Questions? - Mustang Evolution

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Old 02-28-2012, 07:25 AM   #1
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Changing Fluid in Rear End Questions?

Im looking to try and find out how much rear end fluid i will need to completely drain and refill my rear end. i have a 1989 Mustang gt 5.0. i believe its an 8.8" rear end but im no positive...
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Old 02-28-2012, 11:08 AM   #2
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Re: Changing Fluid in Rear End Questions?

it should have a fill plug in it, I believe you fill it until it comes out of the fill plug~ you can remove the cover to drain or you can suck it out. The better way is to remove the cover of course.... but if you dont reseal it good it will leak.
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Old 02-28-2012, 11:32 AM   #3
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Ok cool thanks...can i just use some high heat permatex to re. Seal it or is it better to just buy a new gasket?..or use both?
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Old 02-28-2012, 11:58 AM   #4
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Re: Changing Fluid in Rear End Questions?

the manual says 4.5 pints
but i usually fill till it comes out of the fill hole
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Old 02-28-2012, 12:00 PM   #5
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Quote:
Originally Posted by stampde
the manual says 4.5 pints
but i usually fill till it comes out of the fill hole
++^^ this is correct.
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Old 02-28-2012, 12:05 PM   #6
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Quote:
Originally Posted by stampde
the manual says 4.5 pints
but i usually fill till it comes out of the fill hole
Ok thanks...what do you recomend to re seal it cause i want to pull the cover n inspect everything
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Old 02-28-2012, 12:14 PM   #7
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Re: Changing Fluid in Rear End Questions?

a cover gasket always works
but i prefer Permetex diff sealer
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Old 02-28-2012, 12:16 PM   #8
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Quote:
Originally Posted by stampde
a cover gasket always works
but i prefer Permetex diff sealer
Ok ya i was thinkin with goin with permatex too
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Old 03-20-2012, 11:15 AM   #9
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What weight should i use?.. If it makes a difference
75w 90 or 75w 140
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Old 03-20-2012, 12:57 PM   #10
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Re: Changing Fluid in Rear End Questions?

make SURE (and recheck it many times) that the area is super clean and free of any crap or oil residue before putting the seal on and the cover plate etc.
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Old 03-20-2012, 01:02 PM   #11
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Quote:
Originally Posted by SpectorV
make SURE (and recheck it many times) that the area is super clean and free of any crap or oil residue before putting the seal on and the cover plate etc.
Any suggestion on which weight to use?
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