TR6 Singing

[davjac889]

Hello All,
Anybody know what would make a differential hum or sing?
It is very noticeable and annoying.
Other than that car runs great.
Thanks.
Bill '73 TR6

 

[NutmegCT]

Without actually hearing the noise, I'd guess worn ring and pinion gears if it occurs when accelerating. If it's only when decelerating, probably bad pinion bearing.

Tom

 

[Gliderman8]

I assume you checked the fluid.

 

[TR3driver]

In addition to worn gears, could be improper setup, or mismatched gears. From what I've heard, many freshly rebuilt diffs whine enough to be annoying. Some have gone as far as saying "They all do that", but I don't believe it.

 

[davjac889]

Should I worry about breaking down? Anytime soon? Thanks.

 

[Andrew Mace]

If you have enough oil in it (hopefully it never actually went dry!) and keep it in there, you have a pretty decent chance of living with the hum/whine for years to come!

 

[davjac889]

Thank you. I do keep plenty of oil in it. I'm relieved.

 

[sail]

what would make a differential hum or sing?Bill '73 TR6

It could just be very happy.

 

[NutmegCT]

It could just be very happy.

It has an owner who cares about it!

 

[BobbyD]

The singing differential is one of the reasons Richard Good designed the kit for installing a Nissan diff in a TR6.... they really are quieter https://tr6.danielsonfamily.org/DiffMain.htm