So I need a new rear diff

[MechManiac]

Drained the oil in it earlier. There were metal particles in the oil. Pics coming as soon as I can re-size them.

I guess the mechanic was correct.

[MechManiac]

Here's the pic of the metal particles in the oil. It's in a white bucket and the very small dots are the particles

[MechManiac]

Does anyone know if the diff cover is gonna be a pain to remove? Or is it a simple unbolt the cover and it will slide right out?

[Skyline]

Given the low failure rate of these, why not get a diff from a junkyard?

Also, given the symptoms, I would want to take a close look at the intermediate driveshaft bearing, (in the middle of the rear driveshaft). Those DO have a high failure rate, and can cause similar symptoms. If there are any tears or cracks in the rubber ring, replace this before considering a diff. Take a look at the guibos as well.

[MechManiac]

Originally Posted by Skyline

Given the low failure rate of these, why not get a diff from a junkyard?

Also, given the symptoms, I would want to take a close look at the intermediate driveshaft bearing, (in the middle of the rear driveshaft). Those DO have a high failure rate, and can cause similar symptoms. If there are any tears or cracks in the rubber ring, replace this before considering a diff. Take a look at the guibos as well.

Cool. I'll revisit the centre support bearing and guibo.

[MechManiac]

Update- CSB and guibo are fine. no cracks in the rubber.

[X5SND]

How many miles on your X? There's also a U-joint on the drive shaft that if worn can cause vibrations....but isn't something that would generally wear until you start getting up there in mileage. Just a thought.

[MechManiac]

Just around 92,000 MILES. I was holding the two shafts and twisting them to show play in the U joint and there was obviously none. Judging by the shavings in the oil it is safe to say that the differential is at fault.
My model is a diesel and the diff is the same as in the 4.6is (i think). Will take 2-3 weeks to ship to my skybox and another week till I receive it in Trinidad. It's time to wait and purchase/fab up tools to remove the diff mounts and rear axle now. I cannot express my disgust at this diff.

[MechManiac]

New diff mounts, new inner and outer cv boots, AND A NEW REAR DIFF!

My sex5 is back!