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84LX89GT · 10-06-2005, 02:44 AM

I don't know why the mechanic only replaced the bearings in the rear axle, a whine is caused by the ring and pinion wearing incorrectly or excessively wearing on the thrust face. A rumble or grinding would be bearings.
The '02 and up explorers have had alot of bearing and ring/pinion problems, there has been several special service messages and technical service bulletins on axle whine. for awhile Ford was having us (i'm a ford tech) replace the whole thing. Now there is a kit that includes bearings and the ring and pinion set with all the shims needed to install the ring and pinion set to the correct clearences. ford tightened the specification for backlash between the ring and pinion teeth and i believe changed the manufacturing of the gears.
Alot of times if you go to the dealership and request a different service advisor or request a different technician work on it you may have better luck. Or you could also go to another dealership altogether and see if they do any better.
Good luck,

10-06-2005, 02:44 AM	#7
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Re: rear end whine I don't know why the mechanic only replaced the bearings in the rear axle, a whine is caused by the ring and pinion wearing incorrectly or excessively wearing on the thrust face. A rumble or grinding would be bearings. The '02 and up explorers have had alot of bearing and ring/pinion problems, there has been several special service messages and technical service bulletins on axle whine. for awhile Ford was having us (i'm a ford tech) replace the whole thing. Now there is a kit that includes bearings and the ring and pinion set with all the shims needed to install the ring and pinion set to the correct clearences. ford tightened the specification for backlash between the ring and pinion teeth and i believe changed the manufacturing of the gears. Alot of times if you go to the dealership and request a different service advisor or request a different technician work on it you may have better luck. Or you could also go to another dealership altogether and see if they do any better. Good luck, __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)