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Discussion in '2005+ Ford Mustang v6 4.0L Tech' started by Chistopher, Aug 17, 2021.
My 373 are quiet, only 10k on them.
So the mechanic said the flange wobbles and he heard the pinion bearing is noisy.
If I renew the bearings and the flange, with I disrupt the backlash and the pinion depth ?
Chances are that the flange is OK and its wobbling is due to the bearing issue. Unless the flange itself shows evidence of damage (unlikely).
If I can also jump in here with my Rear Axle Noise
When driving highway speeds for a while, 30mins or so, I start to hear a high pitch noise. It's almost like a dog whistle noise, I tried to record it but is able to. It mostly goes away if accelerating. At first, it will only be there at highway speeds but after some time going highway speeds, it can be heard at normal street speeds. If I stop for a while the noise will go ways and come back again after some time.
a few years ago I had work done on the rear end (a Posi unit, main bearing, seals)
Differential heats up and makes noise. Change the fluid and see what happens.
All this talk of laud differentials. I installed this
And a set of these
And now it sounds like there is a dump truck in my back seat. Is that normal?
Yes, when you install heim joint fittings where rubber originally was, your gonna get noise.
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You might try removing ring & pinion. On small 90* air grinder and using a 2" dia. 80 grit disc chamfering all edges on both the R & P removing the sharp corners which I think might be causing the gears to scream. I am planning on doing this on my 06 GT but haven't gotten around to it.
If you look closely you can see that the sharp edges were removed by the manufacture in the polishing process. I don’t know what more could be done in the sharp edge area. The gears don’t engage heavily on the edges.