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Hum after rear-end gear change



 
 
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Old August 1st 08, 03:50 AM posted to rec.autos.makers.ford.mustang
Spike
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Posts: 413
Default Hum after rear-end gear change

On Thu, 31 Jul 2008 12:02:03 -0700 (PDT), "John S."
> wrote:

>On Jul 31, 6:54 pm, Spike > wrote:
>> On Wed, 30 Jul 2008 05:29:27 -0700 (PDT), "88 Mustang GT Conv."
>>
>>
>>
>> > wrote:
>> >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

>>
>> Similar problem. Had the differential checked as a speed shop. Not a
>> thing wrong with the unit. When they put it back together, no sound.
>> The only change was the posi lube that gets mixed in. The speed shop
>> said to only use the Ford posi lube. Have not had a bit of problem
>> since. Nice and quiet. As I recall, and I can tell you what it calls
>> for, but they used 2 tubes of the Ford posi lube.

>
>guessing you are talking about the "friction modifier"... helps the
>clutches slip when you go around corners... without it they'll chatter
>a bit..


Exactamundo! Kept trying to think of the term for that stuff and just
drew a blank. :0)
 




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