Stationary M25 Traveller Posted June 26, 2008 Share Posted June 26, 2008 Opie recommend the "Redline 75w-90NS" oil for the diff. Noticed they also sell "REDLINE HEAVY ShockProof™ Gear Oil 75w-140" which they say "will certainly quieten it down. Bit thick (the OIL !!! ), but no harm in using it". Blurb says ... REDLINES unique ShockProof™ Gear Oils are recommended for heavily loaded racing differentials and gearboxes which see shockloading. ShockProof™ contains a unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities to give less drag and better shifting. Available as SuperLight, LightWeight and Heavy. A unique lubricant containing a suspension of solid microscopic particles as an extreme pressure agent - unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities. Recommended for heavily-loaded racing differentials and transmissions, Off Road racing and problem gearboxes. The viscosity characteristics allow the lubricant to resist throwoff and provide a film thickness similar to a 75W250 grade, while providing the same low fluid friction as an SAE 75W90. Being a bit thick myself when it comes to such matters - does anyone have any advice on this matter ? Standard diff on 2002 Roadsport SV 1.8 VVC 160 bhp. Noisy - chatters/whines on trailing throttle (TADTS). 7 related photos Edited by - stationary M25 Traveller on 27 Jun 2008 09:52:20 Link to comment Share on other sites More sharing options...
Colin Mill Posted June 26, 2008 Share Posted June 26, 2008 A unique lubricant containing a suspension of solid microscopic particles Sawdust? 😬 Link to comment Share on other sites More sharing options...
Mick Day Posted June 26, 2008 Share Posted June 26, 2008 😶🌫️ Earplugs? 😬 Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 26, 2008 Author Share Posted June 26, 2008 Anyone else have any experience to share ? 7 related photos Link to comment Share on other sites More sharing options...
weeman Posted June 26, 2008 Share Posted June 26, 2008 Hi Ian, I'm sorry I've no experience to share, but if you do find a diff oil that quietens things down significantly would you be so kind to let me know? I really do find the diff noise to be very intrusive. _________________________ Be Lucky!! Martin Link to comment Share on other sites More sharing options...
Colin Mill Posted June 27, 2008 Share Posted June 27, 2008 My earlier post was only partly joking - sawdust in the oil was (is?) an old dodge to shut a noisy back axle up long enough to get the car sold so the basic idea probably works! My only experience of wide range multigrade gear oil (Esso 85w140 if I recall correctly) was in a VW gearbox that became very notchy and hard to change when hot. The multigrade worked very well indeed, solving the change problems completely. Why this oil almost completely disappeared from the market some years afterwards I don't know. Is this Redline one very expensive? Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 27, 2008 Author Share Posted June 27, 2008 I realise it would make life difficult in a gearbox, but I am guessing a diff would not be so choosy. But, being a guess .... I'm seeking reassurance. It is around £16 per 946mL, less Club discount. 7 related photos Link to comment Share on other sites More sharing options...
Colin Mill Posted June 27, 2008 Share Posted June 27, 2008 It is around £16 per 946mL Brazilian Rosewood dust then 😬 Link to comment Share on other sites More sharing options...
millsn Posted June 27, 2008 Share Posted June 27, 2008 Recommendation form spc for type 9 box oil was redline shockproof lightweight, blue yank tub, thin neck. not sure it helps but slightly related. I'm using this with no issues initially in thtat I've only just started running again Link to comment Share on other sites More sharing options...
Bricol Posted June 27, 2008 Share Posted June 27, 2008 I'm using the heavyweight shockproof stuff in an english diff on the back of the trials Dutton. Using a 5.something to 1 CWP, and a 4:1 first gear, it gets some serious abuse on the trial sections, and even more on the road sections to maintain a semi-decent road speed. With trialling, you can be spinning one wheel at high revs for some time, while inching forward as you bounce - so the diff gears get some abuse . . . and when that wheel grips, the torque gets shoved straight across to the other wheel. So far, other than a failed wheel bearing (maybe something to do with 2" wide spacers . .) the axle is holding up well to over 2 yrs of abuse. An example, that isn't me: Normally the diffs fail pretty quickly under that abuse - hence common use of the expensive, but well made, Fack diff. For the 40 quid in oil and delivery, I reckon I got a good result. Plus it does seem to stiffen the diff up a touch . . . this is me on the same section: . A slightly different approach to the same restart - but watch the front wheels push wide momentarily - road pattern tyres at not much pressure work well - I think on one section in there I got down to 4psi ! The 1cwt of lead behind the rear wheels, trolley jack, toolboxes, spare wheels all help of course 😬 Bri Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 27, 2008 Author Share Posted June 27, 2008 Richard didn't get off the line terribly well did he !! Thanks for the info to both of the above. Anyone else got any input ? 7 related photos Link to comment Share on other sites More sharing options...
DaveMorris Posted June 27, 2008 Share Posted June 27, 2008 I've used the lightweight shock-proof oil in an SPC built type 9 gearbox for 3+ years now. Seem to remember that when I first changed over to this oil I thought that it had quietened the 'box down slightly - but difficult to notice much difference over a poorly silenced x-flow. Worth a try in the diff for the cost I would have thought. Note - IF anyone decides to put this Redline Shockproof stuff in their gearbox tehn make sure you get the right one. It''s always been dark green when I've used it. They definitely do one which says on the label "Not for manual gearboxes" and they're right. Syncro doesn't seem to work too well if you use this oil (dont ask ) Ed to add - I might have a bottleof the "thick stuff" on the shelf in the garage. Will look tomorrow. X-flow or Vx. Not a bad choice every morning. Edited by - DaveMorris on 28 Jun 2008 00:12:51 Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 28, 2008 Author Share Posted June 28, 2008 A bit of advice from a transmission specialist:- ... we have seen many instances where heat has got the better of these `shockproof` oils and if you’d seen the resulting damage when it starts to gum up the oil ways you’d understand why we tend to stay clear of it. To be honest you don’t really need anything exotic, a quality fully synthetic 75w/90 should be more than adequate for the gearbox and diff. So, thanks to info@gearboxman.co.uk for that 7 related photos Link to comment Share on other sites More sharing options...
Colin Mill Posted June 28, 2008 Share Posted June 28, 2008 Interesting - does a diff have oil ways? Link to comment Share on other sites More sharing options...
Paul Deslandes Posted June 29, 2008 Share Posted June 29, 2008 Ian I was recommended Redline 75w-90NS by Delta oils a year or two ago for my AP Suretrack LSD and its been fine although its not been taken apart or inspected since I started using it. Its yellow and very thin. Hard to know about noise as my Quaife straight cut is so noisy I can't hear the diff. There is a big difference between oils for plate type LSD diffs and syncro gearboxes as they need different modifier additives and this can be a problem with transaxle transmissions where both systems share the same oil bath. Paul Link to comment Share on other sites More sharing options...
pburt Posted June 29, 2008 Share Posted June 29, 2008 Ian As I think you know, I've just put boggo Comma EP90 in the diff. I've only driven it about 10 miles since but I would say that things are quite a bit quieter - less whine and, I think, a little less clonking. Seems that some (and maybe a lot!) diff noise is a fact of life with 7's?! PS Can I drop your transfer pump in to you one evening this week on my way home? Peter Burt Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 29, 2008 Author Share Posted June 29, 2008 Yes please. Not sure of my work plans yet, but someone will be here, or you know where to stick it 😳 😬 7 related photos Link to comment Share on other sites More sharing options...
pburt Posted June 30, 2008 Share Posted June 30, 2008 Will do! 🙆🏻 Peter Burt Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 30, 2008 Author Share Posted June 30, 2008 Will also be at the Plough Tuesday night if you can make it ?? 7 related photos Link to comment Share on other sites More sharing options...
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