[Fot] Dif. noise

[McKearn McKearn]

My Kids won't fit in the back. The youngest one is 29 and weighs about 230
Lbs.  I think I might have a wheel rubbing issue with him back there..
                                         P.J.

On Wed, Aug 19, 2020 at 3:40 PM Rick McCurdy via Fot <fot at autox.team.net>
wrote:

> Are your kids in the back?
>
> On Aug 19, 2020, at 2:11 PM, Scott Janzen via Fot <fot at autox.team.net>
> wrote:
>
> ouch.  Even in the late 1970s, $200 did not get you much.  Beaters, we
> called them.
>
> On Aug 19, 2020, at 2:00 PM, John H. Hasty <jhasty at mhc-law.com> wrote:
>
> Gee Scott, given your age, a $200 car would have been a fairly current
> model back then!
>
> Sent from my iPhone
>
> On Aug 19, 2020, at 1:52 PM, Scott Janzen via Fot <fot at autox.team.net>
> wrote:
>
>  well, there is the "ignore it" approach.  If you have a spare diff or
> three, no big deal - you could drive 'til it craps out, though at that
> point a rebuild is probably out of the question!
> Back in the old days in Pittsburgh, when I got a $200 car every winter to
> drive through the ice, salt and potholes, there was no maintenance, as long
> as it started.  Of course, that’s because I was preserving my sports car in
> the garage.
>
> On Aug 19, 2020, at 1:47 PM, McKearn McKearn <mckearn2 at gmail.com> wrote:
>
> Thanks for the replies. (Some of you :)
>    I was pretty much planning to pull it apart again but was hoping
> someone would humor me into not worrying about it ..
>                                         P.J.
>
>
>
> On Wed, Aug 19, 2020 at 10:52 AM Scott Janzen <sjanzen at me.com> wrote:
>
>> You can’t really “pull the cover” on a Spit/GT6 diff, but it’s easy
>> enough to drop the whole diff and much easier to examine on the bench.
>>
>> On Aug 19, 2020, at 11:48 AM, vfracing--- via Fot <fot at autox.team.net>
>> wrote:
>>
>> Pat;
>> If it's a stock set up from the factory, my first suspicion would be one
>> of the differential carrier bearings.  That is, if you are certain it is
>> from the differential. Wheel bearings can be checked by pitching the car
>> side to side (no traffic, wide open parking lot) to change the loading and
>> hence the level of whine.
>>
>> But Bob is right: check it out NOW. The cover and perhaps the carrier
>> should be pulled and a visual inspection made.  Look for pitting on the
>> bearings and gear teeth, check the pattern (before pulling the carrier)
>> with Bluing Compound (or, lacking that, bright colored paint)
>>
>> Hopefully it's just a bearing,
>>
>> Phil Gott
>>
>>
>> -----Original Message-----
>> From: Robert Lang via Fot <fot at autox.team.net>
>> To: FOT list <fot at autox.team.net>; McKearn McKearn <mckearn2 at gmail.com>
>> Sent: Wed, Aug 19, 2020 11:39 am
>> Subject: Re: [Fot] Dif. noise
>>
>> CHECK IT BEFORE YOU DESTROY IT.
>>
>> Whining is because the gears aren't meshing properly. This will result in
>> premature wear if you're lucky. If you are not lucky, you'll overheat the
>> diff and / or otherwise destroy it. Sometimes the noise can be from
>> something really dumb, like the ring gear bolts backing out and you find
>> out when one of the bolts wedge in the diff case with the resulting damage
>> to everything. Not that I've done that or anything.
>>
>> And keep in mind that scrap steel prices are "fairly low".
>>
>> Regards,
>> Bob Lang
>>
>>
>> On Wednesday, August 19, 2020, 10:59:08 AM EDT, McKearn McKearn via Fot <
>> fot at autox.team.net> wrote:
>>
>>
>> Hi All.
>>   I am hearing some whining going on behind me when driving my 68 GT6..
>>  It is only at neutral acceleration/deceleration and above 40 MPH ( There
>> is no whine when accelerating or decelerating).   Stock 3.27:1 rear end.
>>                                                            Any thoughts ?
>>                                   Thanks Pat
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