mikeday Posted June 27, 2016 Report Share Posted June 27, 2016 I want to change the oil in the overdrive gearbox on my TR4A. Suggestions about what oil I should use as a replacement, please - eg ancient or modern! Quote Link to post Share on other sites
iain Posted June 27, 2016 Report Share Posted June 27, 2016 Hi try this thread from some weeks ago http://www.tr-register.co.uk/forums/index.php?/topic/55880-gearbox-oil/?hl=%2Bpenrite+%2Bgear&do=findComment&comment=468727 Quote Link to post Share on other sites
mikeday Posted June 28, 2016 Author Report Share Posted June 28, 2016 Thanks.... Quote Link to post Share on other sites
Paul Hogan Posted August 23, 2016 Report Share Posted August 23, 2016 Hi Mike, A lot of people have used EP90 gear oil and it does in fact mention that is an ST approved oil in the owners handbook but I think it was Ian Cornish who dug out a Laycock manual which expressly said " under no circumstances us Extreme Pressure (ie EP90) type oil in an overdrive gear box as it will contaminate the inner clutch face' I've always followed this advice and just use a straight SAE 40 oil in mine. hoges Quote Link to post Share on other sites
peejay4A Posted August 23, 2016 Report Share Posted August 23, 2016 You'll probably get a lot more responses if you repost your question in the TR4/4A Forum. Maybe a mod could move the thread? Quote Link to post Share on other sites
boxofbits Posted August 23, 2016 Report Share Posted August 23, 2016 (edited) I've just topped up with Dynolite 30 gear oil from Moss which is supposedly a replacement for the old EP80 which nearly all manual boxes used of that era. http://www.moss-europe.co.uk/dynolite-gear-oil-30-1-litre-ggl821110.html Regards Kevin Edited August 23, 2016 by boxofbits Quote Link to post Share on other sites
Drewmotty Posted August 23, 2016 Report Share Posted August 23, 2016 Penrite from the Register shop. Super quick delivery when I've ordered in the past. Quote Link to post Share on other sites
monty Posted August 25, 2016 Report Share Posted August 25, 2016 Penrite gear 40 for me. Quote Link to post Share on other sites
Don H. Posted August 25, 2016 Report Share Posted August 25, 2016 Valvoline SAE30 non-detergent in the full-synchro, OD 'box in my TR3B. Recommended by Mark Macy of Macy's Garage over here. Quote Link to post Share on other sites
Steves_TR6 Posted August 25, 2016 Report Share Posted August 25, 2016 Im sure i read that the issue with using EP oil in the gearbox/overdrive was to do with the additives in the GL5 spec oils, and that EP 80 GL 4 was fine? I may have imagine it....... But my gearbox is working fine on EP80 GL4. Steve Quote Link to post Share on other sites
Paul Hogan Posted September 14, 2016 Report Share Posted September 14, 2016 Ive posted this elsewhere on the forum but the official Laycock manual specifically says " do not use Extreme Pressure ie EP grade oil in an overdrive gear box". I have always adhered to this advice and only use SAE 30 or similar. hoges Quote Link to post Share on other sites
RogerH Posted September 15, 2016 Report Share Posted September 15, 2016 Hi Folks, this is what I have read regarding the different parts of the oil spec. Laycock did in fact state that EP oils must NOT be used. The additives break down with the heat from the clutch and can bung up the oil ways. However that was many years ago and most EP oils have been refined. ST did start recommending EP oils in the mid 60's (probably to slow the leaks down) GL5 oils must not be used were yellow metal exists. This was very true a long while ago. According to Miller oils their GL5 oil is OK to use anywhere. However they still have warnings on some of their normal oils - so that's a great help. Engine oil can be used but steer clear of those oils with a high detergent level. It will froth and may make the OD accumulator stop working. Thin oils may leak more than thick oils. Thick oils may be more sluggish when cold than thin oils. Some people swear by ATF - I wouldn't agree with that one though Also don;t forget that viscocity, SAE rating etc changes with whatever use the oil appears to have. I like the simple life - gearboxes need gearbox oil. I use the thinner stuff because it keeps my driveway at the house nice and oily Roger Quote Link to post Share on other sites
Bill Bourne Posted September 16, 2016 Report Share Posted September 16, 2016 ST90 - Castrol for me - Castrol classic http://www.castrol.com/en_gb/united-kingdom/products/cars/classic-oils/classic-engine-oils.html oils best Bill Quote Link to post Share on other sites
Graham Harris Posted September 17, 2016 Report Share Posted September 17, 2016 I have just been through this exercise and on the advise of some very knowledgable Australian TR Register members i filled my A type box with Castrol VMX80 GL4 gear oil and its performing like new , smooth gear changes from cold no rattles or noises I'm very happy with it. Graham Quote Link to post Share on other sites
trevor Posted September 19, 2016 Report Share Posted September 19, 2016 +1 for Penrite gear 40 as recomended by Pete Cox after rebuild. Quote Link to post Share on other sites
aardvark Posted September 19, 2016 Report Share Posted September 19, 2016 ++1 for Penrite gb40 here too. Changed from EP80w90 GL4 12 months ago. Less smelly on the drive. Slightly more notchy until warm. Great service from Penrite as always. Cheers Dave Quote Link to post Share on other sites
james christie Posted October 2, 2016 Report Share Posted October 2, 2016 I've been using EP90 oil of varying provenance in my 3 with overdrive for well over 40 years. It don't seem to have done a lot of harm. James Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.