Rear Differential noise

Discussion in 'Engine' started by mdelfunt, Mar 25, 2017.

  1. mdelfunt

    mdelfunt New Member

    Nov 15, 2016
    Georgia, USA
    06 e320 CDI, 290k miles
    Hey guys, my 06 320CDI (250k miles) has a noise in the rear. I got on the road from Savannah Georgia yesterday headed home and all at once, I started hearing a roar/grind sort of noise coming from the rear. As I drive home 4 hours, the noise would come and go with no particular relationship to any behavior while driving. If I could keep the car at a steady state (not accelerating or decelerating) it seemed the best. About half way home, it started a whining/whistling noise when I would slow down for a stop. Jacked it up this morning and got both rear wheels up and let her run in drive. I can't increase the speed b/c the computer seems to be holding it back to idle while up in the air (anti slip maybe??)

    Both axles and joints seem to be ok - can't find any play in them and there is nothing noticeable going on. After a while I start to hear the noise (although not that bad at idle speed). I can hold either rear wheel to make the opposite one spin and the noise seems to be the same. In essence, it appears to be coming from the differential. I put a steel rod up against it and I can hear the noise. From reading some forums on this site, I see that some are saying that I probably need to change bearings. I have NOT changed the lubricant - I didn't realize I should have. So, I suppose I'm looking for some validation that the issue is what I fear and the best course of action. I'm mostly a DIY kind of guy so I may take on whatever rebuild project myself although I don't have a lift unfortunately.

    I appreciate advise from those who have experience on this issue. How to rebuild, rebuild kit, any special instructions, etc.

    Thank you guys!!

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