No 57 Posted October 25, 2004 Share Posted October 25, 2004 I just wanted to check with the huge amount of knowledge on here The reccomended oil for my gearbox and dif is ep90 gear oil, I've just been to buy some but on closer reading the spec is GL5, I'm pretty sure that this oil shouldn't be used on the more modern stuff but I've got a (new) accademy car (I think they call it a long box, doesn't look modern to me) Will GL5 EP90 be OK ?? what about the diff ? Cheers Ben Link to comment Share on other sites More sharing options...
dino ferrana Posted October 25, 2004 Share Posted October 25, 2004 Caterham sell their own Diff and gearbox oil. It is made for them by Comma and is the definate correct spec. Available at the Caterham South showroom or from the factory parts department. Link to comment Share on other sites More sharing options...
No 57 Posted October 25, 2004 Author Share Posted October 25, 2004 I know that, but they're a. 40 miles away b. considerably more expensive than any other oil of the correct spec Do you know the GL rating for the Comma reccomended oil ?? Link to comment Share on other sites More sharing options...
Jason Plato Posted October 25, 2004 Share Posted October 25, 2004 Gearbox = Redline MTL from demon tweeks or similar Diff = depends what type of diff you are running C7 TOPhere Powered by Hellier Performancehere Link to comment Share on other sites More sharing options...
No 57 Posted October 25, 2004 Author Share Posted October 25, 2004 The redline MTL is a ATF if I'm not mistaken, my gearbox definately wants an EP90, The same with the diff The build manual says, fill with EP90, I can easily do this I just want to make sure the GL grade is right. Especially as the geabox input shaft is going to be spending a large percentage of it's life spinning at, or very near, the maximum permisable revs Link to comment Share on other sites More sharing options...
Jason Plato Posted October 25, 2004 Share Posted October 25, 2004 Nah - the box loves a bit of MTL . As recommended by Phil Stewart @ Road and Race transmissions C7 TOPhere Powered by Hellier Performancehere Link to comment Share on other sites More sharing options...
martinwhitcher Posted October 25, 2004 Share Posted October 25, 2004 MTL every time for box 😬 Martin MW 51 CAT Superlight No.171 now know as:Superlight DVA 207 Link to comment Share on other sites More sharing options...
Stuart Faulds Posted October 25, 2004 Share Posted October 25, 2004 You want a GL4, not GL5. Link to comment Share on other sites More sharing options...
F355GTS Posted October 25, 2004 Share Posted October 25, 2004 Can;t remember exactly but I think the Diff is EP90 and Box EP80 although another vote for Redline MTL Mark Link to comment Share on other sites More sharing options...
shn7 Posted October 25, 2004 Share Posted October 25, 2004 I thought standard spec required EP80 for the g'box and EP90 for the (open) diff. Having said that I'm another Redline MTL convert for the g'box. Steve. Link to comment Share on other sites More sharing options...
Peter T Posted October 25, 2004 Share Posted October 25, 2004 Standard diff oil- EP90. Gearbox- 5&6 speed-GL4 grade. These are from a late build manual. Support the 7 Society...... Ehhh? Link to comment Share on other sites More sharing options...
Peter T Posted October 25, 2004 Share Posted October 25, 2004 Ps, i also use MTL and it is very good. 😬 Support the 7 Society...... Ehhh? Link to comment Share on other sites More sharing options...
No 57 Posted October 26, 2004 Author Share Posted October 26, 2004 I managed to get a GL4 and get in into the box, decided against the MTL for the time being. I also tried to get to the exact difference betweeen a GL4 and GL5, but only got this far A straight GL4 has been designed to help syncromesh gearboxes work smoother, the GL5 is more known as a diff oil because of its load bearing qualities but can affect the syncromesh componants, a GL4/GL5 is happy in a gearbox and happy to take the kind of loads generated by a diff. What really confused me was that the guy at the motor factors who seemed to know what he was talking about, said that almost all the modern gearbox oils were GL5, and Comma only had one GL4 left in the range (which I bought) which they were phasing out. Link to comment Share on other sites More sharing options...
Jason Plato Posted October 26, 2004 Share Posted October 26, 2004 MTL is GL4 C7 TOPhere Powered by Hellier Performance 😬 Now updated Link to comment Share on other sites More sharing options...
Jason Plato Posted October 26, 2004 Share Posted October 26, 2004 If in doubt rather than speak to the guy at the mmotor factors ring Phil Stewart on 01959 525105 hes a good un C7 TOPhere Powered by Hellier Performance 😬 Now updated Link to comment Share on other sites More sharing options...
No 57 Posted October 26, 2004 Author Share Posted October 26, 2004 Thanks Dave My list of usefull phone numbers is growing, unfortunatly I usually get the number about 3 minutes after sorting it out for myself Hmmmm, definately got my wires crossed re MTL, I thought it was a fully synth Link to comment Share on other sites More sharing options...
Stuart Faulds Posted October 26, 2004 Share Posted October 26, 2004 The GL rating has nothing to do with whether it is synthetic or not (afaik). It has been explained to me in the past that GL5 is 'slippier' than GL4, and robs the synchro rings of the friction they need to work. Whatever, Phil rebuilds our gearboxes and he recommends a MTL or a GL4. I believe he had a hand in the development of the Caterham Comma oil (despite the widely held belief in these parts that it's stock Comma/Halfords/whatever oil), so there's nothing wrong with that either. Link to comment Share on other sites More sharing options...
Petrolhead Posted October 26, 2004 Share Posted October 26, 2004 EP80 is GL4 R500 no 65 😬 Link to comment Share on other sites More sharing options...
Peter MarieEa Posted October 27, 2004 Share Posted October 27, 2004 A year or so on this same subject a US contributor highly recommended Honda MTF (manual transmission fluid) claiming it out performed Red Line MTL. I had a 3rd gear syncro' problem in my type 9 gearbox so I gave a try; besides it is a fraction of the cost of MTL. BINGO, syncro' problem disappeared. I should mention that in pumping out the old gearbox oil the last 200mls was gray in colour. It was likely the original oil (12000 miles). So I don't know for sure if it is just fresh oil that solved the problem. Regardless, it's one the easiest problems I've solved on my car. Peter M. '94 VX HPC Quick7 Link to comment Share on other sites More sharing options...
oilman Posted October 27, 2004 Share Posted October 27, 2004 Many of the fully synthetic gearbox oils are both GL-4 and GL-5 as they are also diff oils. What this means is GL-4 protection with GL-5 load carrying capability which is higher. It's sort of best of both worlds. Cheers Simon Link to comment Share on other sites More sharing options...
Petrolhead Posted October 27, 2004 Share Posted October 27, 2004 Difficult though when caterham specifically state in the handbook NOT to buy GL5 *confused*again R500 no 65 😬 I am after a passenger side half door Link to comment Share on other sites More sharing options...
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