Rear end noise, anybody know what this is?
While going down the road, anywhere from 40 to 70 mph there is a loud humming noise from above the rear axle. It sounds as if I have an F150 with humongous monster mud tires on it. It's that same sou...
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Doubt its the u-joints. Bad u-joints will make a clicking sound and change with RPM's.
The problems is most likely in your rear differential. It could be as simple as a worn bearing or bad gears (although I think your gears are fine). Either way the rear end will have to be taken apart. Anytime you take a differential apart there is huge labor costs as the gears need to be properly re-installed with shims. Any one can rebuild a differential, but getting proper backlash, gear mesh and inch pounds setup properly on the pinion takes a "great" mechanic with the proper tools. If its under warranty take it to Ford. If not and you know a mechanic that does a good job then take it to him. I would guess a minimum of $300 on labor plus parts. If one bearing is bad just best to replace them all as installing the bearings is the easy part, again the labor is in the alignment.
One thing I would not do is drive this thing around. If you do it could leave you stranded and cost even more to fix.
The problems is most likely in your rear differential. It could be as simple as a worn bearing or bad gears (although I think your gears are fine). Either way the rear end will have to be taken apart. Anytime you take a differential apart there is huge labor costs as the gears need to be properly re-installed with shims. Any one can rebuild a differential, but getting proper backlash, gear mesh and inch pounds setup properly on the pinion takes a "great" mechanic with the proper tools. If its under warranty take it to Ford. If not and you know a mechanic that does a good job then take it to him. I would guess a minimum of $300 on labor plus parts. If one bearing is bad just best to replace them all as installing the bearings is the easy part, again the labor is in the alignment.
One thing I would not do is drive this thing around. If you do it could leave you stranded and cost even more to fix.
