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<div dir="ltr">Hi Doug,<br> <br>I received several responses; the conventional wisdom was to remove the differential and have a specialist carry out the work. That is on my to-do list.<br> <br>Until I get to that item on my list, here is what I have done. I drained the Penrite 80W 90 mineral gear oil, and replaced it with Penrite 140 Gear Oil - Premium Mineral. This product claims "for quieting noisy differentials, where the noise is due to wear, thus prolonging the life of the unit". <br> <br>After about 60 miles of driving, the whine was certainly still evident. A bit quieter, but not significantly so. Following suggestions from others, I then added Nulon G70 to the Penrite 140 Gear Oil in the differential.<br> <br>I have covered some 1,123 miles since then. <br> <br><strong>Conclusion:</strong> The pitch level of the diff whine is lower, more like a humming; it is now easier to live with at and above 60mph. The most improvement occurred after adding the Nulon G70. I will continue to run this combination in the differential for now. Knowing the result, I would do it again. <br> <br>As has been pointed out by others, the real fix is to have the differential adjusted or repaired by a differential specialist.</div><div dir="ltr"> </div><div dir="ltr">Hope that answers your question.</div><div dir="ltr"> </div><div dir="ltr">Regards, Graham Wilkie.</div><div dir="ltr">Moruya, Australia. <br> <br></div><div dir="ltr">> From: douglas.barker@videotron.ca<br>> To: glwilkie1@bigpond.com; healeys@autox.team.net<br>> Subject: RE: [Healeys] SAE 140 Use In Differential To Reduce Noise?<br>> Date: Wed, 23 Dec 2015 14:02:17 -0500<br>> <br>> This goes way back but did anybody respond and if so what was the<br>> conclusion?<br>> <br>> -----Original Message-----<br>> From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]<br>> On Behalf Of Graham Wilkie<br>> Sent: Thursday, April 03, 2014 10:43 PM<br>> To: healeys@autox.team.net<br>> Subject: [Healeys] SAE 140 Use In Differential To Reduce Noise?<br>> <br>> Hello All,<br>> <br>> The differential on my 1966 BJ8 starts to whine once I have driven for<br>> several miles, and everything has warmed up to normal operating temperature.<br>> It only occurs during accelerator pedal movement down (under load). The<br>> whining diminishes during coasting or deceleration.<br>> <br>> The differential is filled with Penrite 80W 90 mineral gear oil. (Recently<br>> changed).<br>> <br>> I am considering replacing my differential gear oil with Penrite SAE 140<br>> mineral gear oil. (Note no 'W' prefix; it is straight SAE 140). This product<br>> claims it will reduce differential noise in older vehicles. I wonder if it<br>> is suitable for our Healeys?<br>> <br>> I seem to recall reading on the List that our rear wheel bearings are splash<br>> lubricated by differential oil, but cannot find any reference to that in my<br>> workshop manual. Is that correct? I'm concerned that if that is the case,<br>> will the SAE 140 be too viscous to splash lubricate the rear wheel bearings<br>> effectively?<br>> <br>> Would I be better of using a gear oil additive like Nulon G70 instead?<br>> <br>> Any shared thoughts or suggestions would be greatly appreciated.<br>> <br>> Thank you.<br>> <br>> Regards, Graham Wilkie.<br>> BJ8 Moruya NSW Australia.<br>> _______________________________________________<br>> Support Team.Net http://www.team.net/donate.html Suggested annual donation<br>> $12.75<br>> Archive: http://www.team.net/archive<br>> Forums: http://www.team.net/forums<br>> <br>> Healeys@autox.team.net<br>> http://autox.team.net/mailman/listinfo/healeys<br>> <br>> Unsubscribe/Manage:<br>> http://autox.team.net/mailman/options/healeys/douglas.barker@videotron.ca<br>> <br></div>
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