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Old July 30th 08, 10:06 PM posted to rec.autos.makers.ford.mustang
Dan[_21_]
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Posts: 10
Default Hum after rear-end gear change

"88 Mustang GT Conv." > wrote in news:a324e9b0-
:

> I'm coming to all of you as the experts.
>
> I've recently had my gears changed in my 1988 5.0L convertible to
> 3:73:1. (I only have 152,000KM on the car) There's a humming noise
> which comes from the rear-end which gets significanltly louder between
> 60-90 KM / Hr.
>
> I was told by the mechanic that this is a common thing with the gears
> and should be ignored.
>
> Just wanting to get some thoughts/opinions.
>
> The mechanic I'm dealing with is great and has always done excellent
> work on the car. He goes over and above what I've asked him to do with
> little cost.
>
> I'm just thinking that it should be normal as it can become quite
> annoying.
>
> Thanks in advance,
> Marc


What brand were the gears? Ford gears have earned a reputation (at least
among the installers I know on- and off-line) for requiring the least
amount of adjustment and resulting in the least amount of noise after
installation. I know a couple of local installers that won't touch any
other brand because of the difficulties they've had in the past with other
aftermarket gears.

A little whine is not uncommon because of wear and tolerances in the
carrier. Sometimes it goes away, or at least gets quieter, as the gears
wear/break in.

However, something described as a "hum" doesn't sound right to me. The
worst noise should be an almost subliminal high pitch whine. More than that
means it's not shimmed right or something isn't meshing well.

Dan
P49Y83+
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