Thicker oil may help for a while, but it does not take away the problem.
The diff may well continue to function with wine for ever, but it
certainly is not a pleasant noise
Have the diff attended to to prevent perhaps further mishaps and most
certainly to eliminate that worrying feeling.
Kees Oudesluijs
Op 23-12-2015 om 20:02 schreef Doug Barker:
> This goes way back but did anybody respond and if so what was the
> conclusion?
>
> -----Original Message-----
> From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
> On Behalf Of Graham Wilkie
> Sent: Thursday, April 03, 2014 10:43 PM
> To: healeys@autox.team.net
> Subject: [Healeys] SAE 140 Use In Differential To Reduce Noise?
>
> Hello All,
>
> The differential on my 1966 BJ8 starts to whine once I have driven for
> several miles, and everything has warmed up to normal operating temperature.
> It only occurs during accelerator pedal movement down (under load). The
> whining diminishes during coasting or deceleration.
>
> The differential is filled with Penrite 80W 90 mineral gear oil. (Recently
> changed).
>
> I am considering replacing my differential gear oil with Penrite SAE 140
> mineral gear oil. (Note no 'W' prefix; it is straight SAE 140). This product
> claims it will reduce differential noise in older vehicles. I wonder if it
> is suitable for our Healeys?
>
> I seem to recall reading on the List that our rear wheel bearings are splash
> lubricated by differential oil, but cannot find any reference to that in my
> workshop manual. Is that correct? I'm concerned that if that is the case,
> will the SAE 140 be too viscous to splash lubricate the rear wheel bearings
> effectively?
>
> Would I be better of using a gear oil additive like Nulon G70 instead?
>
> Any shared thoughts or suggestions would be greatly appreciated.
>
> Thank you.
>
> Regards, Graham Wilkie.
> BJ8 Moruya NSW Australia.
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