price Posted March 25, 2010 Share Posted March 25, 2010 hi all.just wondering what oil i need to put in an d type overdrive. Link to comment Share on other sites More sharing options...
sparky_spit Posted March 25, 2010 Share Posted March 25, 2010 EP 90 to GL4 spec. Or EP80/90 to GL4 spec. GL5 spec oil is not recommended due to its abilty to damage yellow metals within the gearbox/OD internals. Link to comment Share on other sites More sharing options...
Jonny-Jimbo Posted March 25, 2010 Share Posted March 25, 2010 Balls, think I just topped mine up with some GL5. Link to comment Share on other sites More sharing options...
Goody Posted March 26, 2010 Share Posted March 26, 2010 Need to be clear here. GL4 in type d overdrive only? None of my 3 Heralds have overdrive and I use GL5. What about type j overdrive? Link to comment Share on other sites More sharing options...
herald948 Posted March 26, 2010 Share Posted March 26, 2010 I don't know that some GL-5's problems with attacking yellow metal (especially thrust washers and such) is as big a deal in a gearbox as it can be in a differential. But for peace of mind and limiting the number of different lubes I need to keep on hand, I stay with the factory-recommended GL-4 spec. in gearbox (OD or otherwise) as well as differential (oh, and steering swivels, of course!). I don't have any later Spitfire manuals handy, so I don't know what the factory spec'd for the J-type OD. Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 26, 2010 Share Posted March 26, 2010 some GL5 are bronze compatible but as you need to know more than whats on the can its best to say 'dont go there'certainly the bronze 2nd and 3rd gear bushes are a likely case for the heat and load generating degradationBaulk rings are harded and suffer less, stick to what is specified use EP80/90 GL4 and be safeif you look at overdrives they specifiy engine oil , fact a Triumph gear box is not going to survive on that,(unlike say a Rootes Group unit) the OD will work happily on EP80/90 so the OD has no bearing on the oil its the gearbox thats the weakest link . Pete Link to comment Share on other sites More sharing options...
sparky_spit Posted March 26, 2010 Share Posted March 26, 2010 Goody wrote:Need to be clear here. GL4 in type d overdrive only? None of my 3 Heralds have overdrive and I use GL5. What about type j overdrive?Yes Bill, GL4 in the J-type too. In fact, I think I'm right in saying that you only ever need 2 oils in stock; whatever oil you use for your engine, and some EP80/90 GL4 for gearbox/OD, Diff, and front trunnions/vertical link. Oh, and whatever you choose to put in your dashpot(s) if you don't like engine oil. Link to comment Share on other sites More sharing options...
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