[Fot] Dif. noise

[McKearn McKearn]

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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