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Old 07-04-2013, 10:27 PM   #1
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So I've noticed this for alittle while now, but driving home from fireworks tonight my girlfriend even noticed it(happens at higher speeds)
Sometimes when I get on the gas it whines, sometimes when I let off it does, like it has no direct connection with acceleration or the motor
It sounds like from sitting In the driver seat, it sounds like it's coming from the passenger rear wheel area
I'm almost kind of hoping that my rear end could be bad, give me a reason to buy the 8.8 rear end
; )
Also when I'm doing say anywhere between 45 and 65 And I get on it, I can feel like the neck snap back from acceleration, which I didn't think out cars had that big of a kik
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Old 07-05-2013, 08:30 AM   #2
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sounds like ur gears r going bad.
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Old 07-05-2013, 08:48 AM   #3
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try changing the rear end oil. Shouldn't cost to much, it would be cheaper than new gears.
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Old 07-05-2013, 09:08 AM   #4
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Quote:
Originally Posted by fastmustangs1 View Post
sounds like ur gears r going bad.
That would be the excuse to get an 8.8 rear

---------- Post added at 08:08 AM ---------- Previous post was at 08:08 AM ----------

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Originally Posted by lemons95 View Post
try changing the rear end oil. Shouldn't cost to much, it would be cheaper than new gears.
What's the weight oil you use for the rear end, and how often are you supposed to change it
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Old 07-05-2013, 01:50 PM   #5
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I have no idea, I've never changed mine and it's got over a 160,000... maybe the previous owners changed. I think your suppose to change it every 60,000 miles.
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Old 07-05-2013, 03:49 PM   #6
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I have no idea, I've never changed mine and it's got over a 160,000... maybe the previous owners changed. I think your suppose to change it every 60,000 miles.
Yeah I'm running almost 150,000
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Old 07-05-2013, 07:38 PM   #7
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75W-90 stock fluid weight as per your owners manual
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Old 07-05-2013, 08:50 PM   #8
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75W-90 stock fluid weight as per your owners manual
David Ik you've Obviously pushed your Sixxer, Center putting the 8.8 in it, Before yours broke did it give any symptoms of what's going on with mine
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Old 07-05-2013, 08:54 PM   #9
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Originally Posted by Blovett55 View Post

David Ik you've Obviously pushed your Sixxer, Center putting the 8.8 in it, Before yours broke did it give any symptoms of what's going on with mine
What I thought was the probably, clunking sound, was actually loose control arms, so I honestly didn't have a clue till I pulled it out and found out the races spun under caps.

Any noise it would have made was covered by the sound of solid lower control arm bushing as that along with the poly bushing made a lot of NVH (noise vibration harshness) along with the gutted end, I pretty much ignore any noises the car makes.
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Old 07-05-2013, 08:56 PM   #10
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What I thought was the probably, clunking sound, was actually loose control arms, so I honestly didn't have a clue till I pulled it out and found out the races spun under caps.
Well I was planning on putting drilled slotted rotors, brand-new centri-posi gold calipers to accent the gold on my car, and new brake pads on my car on all four corners
But I think now I'm going to buy an 8.8 rear end first, it gives me that excuse to
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Old 07-05-2013, 08:57 PM   #11
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Remember 8.8's use 75W-140 if you swap
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Old 07-05-2013, 09:06 PM   #12
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Remember 8.8's use 75W-140 if you swap
Yeah so sorry, idt ima be able to buy your posi gears
I mean the best way I can describe it is like your muscles are loose and everything but when you flex they contract really fast, that's how it felt like cruising or At a steady acceleration speed, the rear end felt just there, But when I punched it, it felt like a kik from the rear end
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Old 07-05-2013, 09:17 PM   #13
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Yeah make sure the 7.5 is good lol be like me buy stuff and then find out the housing is F!@$ed
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Old 07-05-2013, 09:22 PM   #14
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Yeah make sure the 7.5 is good lol be like me buy stuff and then find out the housing is F!@$ed
Ill prob change fluid and if still acting up, buy the 8.8
I haven't had to change the fluid on a Mustang yet, does it have a drain and fill plug back there, or do you have to take the whole housing off to drain it
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Old 07-05-2013, 09:28 PM   #15
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Have to take the cover off to drain it, fill plug uses a 3/8" ratchet head (aka square end, just use a 3/8" ratchet with an extension to remove it) on the front side of the differential by the pinion flange
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Old 07-05-2013, 09:30 PM   #16
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Have to take the cover off to drain it, fill plug uses a 3/8" ratchet head (aka square end, just use a 3/8" ratchet with an extension to remove it) on the front side of the differential by the pinion flange
So will I need to buy new gasket for the cover
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Old 07-05-2013, 09:36 PM   #17
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I just put it back on with black silicone alone, don't need a gasket
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Old 07-05-2013, 09:37 PM   #18
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I just put it back on with black silicone alone, don't need a gasket
Smart man
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Old 07-05-2013, 09:39 PM   #19
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You make your girlfriend ride in the trunk?
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Old 07-05-2013, 09:39 PM   #20
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You make your girlfriend ride in the trunk?
When she doesn't shut up about all the mods I buy
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Old 07-06-2013, 12:29 AM   #21
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when the rear-end switches power to the other side does it make a clunk? or is it suppose to be quiet.
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Old 07-06-2013, 08:28 AM   #22
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when the rear-end switches power to the other side does it make a clunk? or is it suppose to be quiet.
Mine when. I get on the gas does I guess
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