Leeroy Posted July 20, 2011 Share Posted July 20, 2011 I'm about to have my Zed serviced and thought it would be a good idea to change the gearbox and diff oil as the car's done 70,000 miles and as far as I know they haven't been done. I've been reading up on this on the forum and am a bit worried that new gearbox oil could result in a stiffer box when cold (and first is already a little stiff when cold). First of all, will Molyslip additive cure this? Secondly, I want to make sure the right fluids go in, am I right in thinking that the gearbox oil is 75w85 API GL4 and the diff oil is 80w90 API GL5? I take it I shouldn't stray to any other spec no matter how similar? DMS are doing the service so I would hope they drop the correct oil in as I've been very impressed wih their work in the past Finally, if my car doesn't have any gearbox/diff issues would you all recommend changing the fluids at all and what benefits could I expect to feel afterwards? Quote Link to comment Share on other sites More sharing options...
Lincolnbaggie Posted July 20, 2011 Share Posted July 20, 2011 Give Zmanalex a PM - he knows all about the fluids etc (and stocks them as well). Quote Link to comment Share on other sites More sharing options...
Southernspeed Posted July 20, 2011 Share Posted July 20, 2011 My box was noticeably smoother, even when cold after an oil change. It's still got that very 'positive' feel but much nicer. Abbey Motorsport did my service so you could check with them as to what oil they use. Quote Link to comment Share on other sites More sharing options...
Leeroy Posted July 20, 2011 Author Share Posted July 20, 2011 I got my specs from Alex's info here on the forum and I've contacted Dixon at DMS and asked him to confirm that this is what he will use Anyone know anything about Molyslip gearbox additive - is it a 'win win' or are there drawbacks from using it? Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted July 20, 2011 Share Posted July 20, 2011 Best to supply your own fluids as that way you know that they are 100% correct. The DC Moly will definately help. All in stock and good to go same/next day. Alex. Quote Link to comment Share on other sites More sharing options...
Leeroy Posted July 22, 2011 Author Share Posted July 22, 2011 I have the car booked in with DMS and they normally use a 75w90 oil (same for 'box and diff so I guess the GL rating will be the same?) which Dixon says is better for cold and hot use. I bow down to his knowledge of performance cars, however, based on what I have heard I feel more confortable sticking to genuine Nissan fluids for the 'box and diff. He's happy to put whatever I want in so that's cool. Can anyone give me the Nissan part no. for the gearbox oil (75w85 API GL4+) and the diff oil (80w90 API GL5) please? Quote Link to comment Share on other sites More sharing options...
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