ahebron Posted April 18, 2020 Report Share Posted April 18, 2020 Back in the day Triumph could happily sell you a new diff! And these days we put more power through 50 year old diffs than they were designed for. But saying all that preventative maintenance is way better than replacing or rebuilding Link to comment Share on other sites More sharing options...
daverclasper Posted April 18, 2020 Report Share Posted April 18, 2020 20 minutes ago, poppyman said: I have to say, i have started using 140 gear oil in my Triumphs, they seem quieter and one in particular hardly leaks now Is that in the gearbox as well Tony?. Dave Link to comment Share on other sites More sharing options...
Nigel Clark Posted April 18, 2020 Report Share Posted April 18, 2020 I change the gearbox and diff oil every couple of years, using Millers EP80W90 GL4. Using EP140 in the diff sounds interesting. But I would expect the higher viscosity would be a problem in overdrive gearboxes and could make the overdrive slower/reluctant to engage. Nigel Link to comment Share on other sites More sharing options...
johny Posted April 18, 2020 Report Share Posted April 18, 2020 Yes I wonder if a thicker oil would slow up the gear changes a little as I find that sometimes the lever inadvertently moves too quickly so not giving the synchro time to do it's job properly resulting in a crunch... Link to comment Share on other sites More sharing options...
poppyman Posted April 18, 2020 Report Share Posted April 18, 2020 12 minutes ago, daverclasper said: Is that in the gearbox as well Tony?. Dave No Dave, just the diff's. I think it would be a bit heavy for the gearbox? I can't even try it as all my cars are automatic. I have heard mentioned somewhere that 20/50 can be used in the gearbox?? Please don't try it without confirmation, but i can recommend the 140in the diff's. Tony. Link to comment Share on other sites More sharing options...
poppyman Posted April 18, 2020 Report Share Posted April 18, 2020 You all beat me to it re gearbox Tony. Link to comment Share on other sites More sharing options...
Clive Posted April 18, 2020 Report Share Posted April 18, 2020 17 minutes ago, johny said: Triumph obviously weren't too worried though and I don't think back in the day diffs failing was an issue... But remeber that most Triumphs never made their 10th birthday. So yes, new ones available, and plenty in every scrapyard. Today a properly rebuilt diff is £800?? CWP sets are usually too worn to be much good and some parts are unobtanium (but the rebuilders must have a stash, but shims seem impossible find) Now Marcus has reappeared, I think it was he who suggested a magnetic plug in the filler collected a lot of swarf? I also remember, though possibly my imagination, that somebody had fitted a drain plug in situ. Drilled the diff, tapped and flushed the diff then fitted a setscrew/washer. As for 140 oil, Moss sell a 85 140 oil, GL5 rated BUT is compatible with yellow metals so safe to use in a diff. I have a bottle for my mk3 spit, with a very slightly noisy diff. https://www.moss-europe.co.uk/dynolite-no-noise-ep-85w-140-1-litre-ggl823310.html Nigel, I too use millers 80-90 GL4 for most stuff. Type 9 box uses Comma sx75-90 GL4 oil (as recommended by BGH, the best Type 9 specialist out there) and that does not go smelly after a few years use in a hard-used gearbox. Made a pleasant change! but that would be OK in a triumph box. I don't see any advantage in thicker gearbox oil, better quality yes. Link to comment Share on other sites More sharing options...
poppyman Posted April 18, 2020 Report Share Posted April 18, 2020 This was the stuff i used. https://www.ebay.co.uk/itm/EP140-Hypoid-Gear-Oil-API-GL4-GL-4-EP-140-5-Litre-5L/370382995040?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Not had problem with it apart from getting it in Tony. Link to comment Share on other sites More sharing options...
Nick Jones Posted April 18, 2020 Report Share Posted April 18, 2020 Been using this for about 12 years https://www.opieoils.co.uk/p-1023-red-line-heavy-shockproof-gear-oil-75w-140.aspx looks like blood....... Link to comment Share on other sites More sharing options...
Guest Posted April 18, 2020 Report Share Posted April 18, 2020 Hello Nick, I can certainly agree to Red Line lubricants, I use their MT-90 fully synthetic gear oil in my Daimler gearbox which is now a Toyota W58 5-speed unit, from a Lotus Excel. Red Line provide excellent products and their prices are not off the radar either. Regards. Richard. Link to comment Share on other sites More sharing options...
Nick Jones Posted April 18, 2020 Report Share Posted April 18, 2020 Hi Richard, Also use Redline MT90 in the W58 in my Vitesse. Nick Link to comment Share on other sites More sharing options...
Guest Posted April 18, 2020 Report Share Posted April 18, 2020 4 minutes ago, Nick Jones said: Also use Redline MT90 in the W58 in my Vitesse. Excellent news & better than a manufacturers endorsement, in my book, Nick !! Best wishes. Richard. Link to comment Share on other sites More sharing options...
poppyman Posted April 18, 2020 Report Share Posted April 18, 2020 Opie oil's carry a huge range of lubricants and Bilt Hamber products. They also have a very quick delivery service and are most helpful on the phone. They quite often have good prices in their Fleabay shop as well. Tony. Link to comment Share on other sites More sharing options...
rogerguzzi Posted April 18, 2020 Report Share Posted April 18, 2020 8 hours ago, Nick Jones said: Been using this for about 12 years https://www.opieoils.co.uk/p-1023-red-line-heavy-shockproof-gear-oil-75w-140.aspx looks like blood....... Hello All I have been using this for about 7+ years and it does not seem to go black! Not the cheapest but as all say differentials are not cheap either!!! Roger Link to comment Share on other sites More sharing options...
GT6M Posted April 20, 2020 Report Share Posted April 20, 2020 Using EP140 in the diff sounds interesting. But I would expect the higher viscosity would be a problem in overdrive gearboxes and could make the overdrive slower/reluctant to engage. Nope, i use it in me ODs, and it goes in / oot ne probs at all. the 85/140 is just like use,n a 20/50 engine oil really, supposedly thinner when cold, supposedly thicker when hot It ne probs at all drill,n diff in situ drill a 5/16 / 8mm first, oil will no fly oot all owa the spot, meb,e a wee dribble doon the drill bit, honest. then drill bigger, either a taper or a straight thread. taper is best, as dont ev t,worry about the base sealing GB sump plugs ok they got a magnet in em yer fill plug, bung one in thea as wee,l it,ll catch moer sheite as ive found oot Fill,n it, get yer selves yan of thee,s handy thing,ys very handy they are https://www.ebay.co.uk/itm/Sealey-Oil-Suction-Hand-Syringe-Gun-Pump-Gearbox-Fill-Extractor-500ml-AK47/390974104414?hash=item5b07df635e:g:~WsAAOSwQLVd5mh8 Link to comment Share on other sites More sharing options...
Nigel Clark Posted April 20, 2020 Report Share Posted April 20, 2020 Thank you Marcus. I'm going to try EP85W140 in the Salisbury axle of my Scimitar first. That rattles a bit when hot - planet gear end float perhaps. If that's good, I will put it in the Triumphs. Nigel Link to comment Share on other sites More sharing options...
daverclasper Posted April 24, 2020 Report Share Posted April 24, 2020 On 20/04/2020 at 18:11, GT6M said: It ne probs at all drill,n diff in situ drill a 5/16 / 8mm first, oil will no fly oot all owa the spot, meb,e a wee dribble doon the drill bit, honest. then drill bigger, either a taper or a straight thread. taper is best, as dont ev t,worry about the base sealing GB sump plugs ok they got a magnet in em yer fill plug, bung one in thea as wee,l it,ll catch moer sheite as ive found oot Thanks Marcus. What tap size for the threads?, to fit either taper /straight plug, magnetic in my case. The female threads are always straight I assume, It's the plug that' tapered?. Cheers, Dave Link to comment Share on other sites More sharing options...
GT6M Posted April 24, 2020 Report Share Posted April 24, 2020 you,ll need a 3/8th BSP, well thats what I use Link to comment Share on other sites More sharing options...
Mad4classics Posted April 25, 2020 Report Share Posted April 25, 2020 Triumph filler and drain plug threads were originally 3/8 NPT Taper, but if you've got a different plug to use, you need the thread to suit that. Just remember what goes where! David Link to comment Share on other sites More sharing options...
SpitFire6 Posted April 25, 2020 Report Share Posted April 25, 2020 Hi, The Penrite Full Synthetic SAE 80W-140 gear oil is API GL-5/6. Surprised nobody has said it must be GL-4! Good. Cheers, Iain. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 25, 2020 Report Share Posted April 25, 2020 to back up the GL4 GL5 problems we manufacturing trucks for years had diffs to run on GL4 we had the renault buy out and supplies took a change to their specs and without knowing GL5 was introduced , followed by warranty boxes of diffs with rubbished thrust cups on the planet gears in the diff soon advised by our metallurgist it was degraded due to oil attack this unkown simple change cost a fortune less of a problem on gearbox but on high power diff units where temperatures are way higher and the loading undertaken was disaster to what had been very reliable units with years of reliability ...wrecked by GL5 Pete Link to comment Share on other sites More sharing options...
SpitFire6 Posted April 25, 2020 Report Share Posted April 25, 2020 Hi Pete, Today a lot of gear oil marked as GL-5 are fine in the diff. Some of the early GL-5's were not as you have witnessed. I have a "white paper" somewhere about API GL-4, GL-5, MT-1 & MIL-PRF-2105E. I personally would not use an oil that was only marked GL-4. There are far better oils out there in all respects apart from cost. I am not talking about gearboxes or OD's. Cheers, Iain. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 25, 2020 Report Share Posted April 25, 2020 this was in 1990's Pete Link to comment Share on other sites More sharing options...
rlubikey Posted April 25, 2020 Report Share Posted April 25, 2020 2 hours ago, SpitFire6 said: Hi, The Penrite Full Synthetic SAE 80W-140 gear oil is API GL-5/6. Surprised nobody has said it must be GL-4! Good. Cheers, Iain. Iain, they do state that PRO GEAR 80W-140 (Full Syn.) is "Compatibility with copper alloy components" (under "benefits" tab) - i.e. yellow metals. Some manufacturers do have similar statements, without which I would not risk using a GL5. Cheers, Richard Link to comment Share on other sites More sharing options...
SpitFire6 Posted April 25, 2020 Report Share Posted April 25, 2020 4 minutes ago, rlubikey said: Iain, they do state that PRO GEAR 80W-140 (Full Syn.) is "Compatibility with copper alloy components" (under "benefits" tab) - i.e. yellow metals. Some manufacturers do have similar statements, without which I would not risk using a GL5. Cheers, Richard Hi, Yes. Sometimes the manufacturer makes the choice easy. My point was that it does not have to be GL-4 Only oil. Cheers, Iain. 1 Link to comment Share on other sites More sharing options...
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