Puptread Posted May 30, 2013 Share Posted May 30, 2013 Hi all Had shift problems especially in the morning when cold Just to say I've stuck new comma 75-90 oil in and a tube of molyslip ,and this morning , no shift problem at all , and generally all round better gear change. Quote Link to comment Share on other sites More sharing options...
bamdc2 Posted May 30, 2013 Share Posted May 30, 2013 Yup, a lot of people on hear use molyslip. Its great stuff! 1 Quote Link to comment Share on other sites More sharing options...
roscopervis Posted May 30, 2013 Share Posted May 30, 2013 Just changed the gearbox and diff oil on mine and it feels sooooo much nicer! The whole drivetrain feels smoother and tighter. Much better and I can't believe the difference it has made. Quote Link to comment Share on other sites More sharing options...
Stutopia Posted May 30, 2013 Share Posted May 30, 2013 This stuff sounds good. Is it the 2001G? Quote Link to comment Share on other sites More sharing options...
MartynB85 Posted May 30, 2013 Share Posted May 30, 2013 I'm going to have to try this too. Any ideas what the best oil to use is? Doesn't matter how much it costs.... Also does anyone know if you can fill the box back up from inside the cabin by removing the gearstick? Quote Link to comment Share on other sites More sharing options...
Puptread Posted May 30, 2013 Author Share Posted May 30, 2013 I didn't use the 2001g I used the basic black stuff that comes in a squeeze tube Just read about the latter , sounds good ! Quote Link to comment Share on other sites More sharing options...
Puptread Posted May 30, 2013 Author Share Posted May 30, 2013 I used the comma semi synth 75-90 just to see if it made any difference , it did : ) and wasn't silly money. As for filling/ draining , you wouldn't be able to reach the drain plug through the gear stick area and not sure about top ip plug I used front ramps and 4ft of garden hose to fill mine up Also warmed the oil up in the microwave so the oil in the bottle flowed easier Ended up an easy job. Quote Link to comment Share on other sites More sharing options...
gareth29 Posted May 30, 2013 Share Posted May 30, 2013 Another job to do then - mine is quite obstructive from 1st to 2nd - I will try this. Quote Link to comment Share on other sites More sharing options...
glrnet Posted May 30, 2013 Share Posted May 30, 2013 Another job to do then - mine is quite obstructive from 1st to 2nd - I will try this. Might not cure that as it's a known trait of the Zed box Quote Link to comment Share on other sites More sharing options...
Tinyflier Posted May 30, 2013 Share Posted May 30, 2013 (edited) My car is currently with Abbey (and I have their GT86 to play with!) and one thing they are doing is changing the transmission fluids. I too suffer from a recalcitrant 1st to 2nd shift at times (first time I have ever had a car the benefits from double declutching when moving UP the box!). I raised the topic of Molyslip and Mark isn't a big fan of using additives in premium oils. Abbey's fluid of choice for the gearbox is SUNOCO75W/80 GL4 I am not saying it should/shouldn't be done and evidentially there are some who appear to have benefitted - just giving an alternate view. David Edited May 30, 2013 by Tinyflier Quote Link to comment Share on other sites More sharing options...
pathfinder123 Posted May 30, 2013 Share Posted May 30, 2013 My car is currently with Abbey (and I have their GT86 to play with!) and one thing they are doing is changing the transmission fluids. I too suffer from a recalcitrant 1st to 2nd shift at times (first time I have ever had a car the benefits from double declutching when moving UP the box!). I raised the topic of Molyslip and Mark isn't a big fan of using additives in premium oils. Abbey's fluid of choice for the gearbox is SUNOCO75W/80 GL4 I am not saying it should/shouldn't be done and evidentially there are some who appear to have benefitted - just giving an alternate view. David Later this year I will be booking my Z into Abbey for a Revup, and thought that I would let them change the gearbox oil and add Molyslip. So I am interested in Mark's view on additives. Perhaps somewhere on the InterWeb there are the results of independant scientific tests to show the pros and cons of adding Molyslip. S. Quote Link to comment Share on other sites More sharing options...
jell36 Posted May 30, 2013 Share Posted May 30, 2013 There are a few articles on the web that advise against molyslip, the article's main reasoning is that the synchros rely on friction for their function and the moly slip lowers this and so as a result degregates the function of the synchros. Contrary to this, many people on here have used moly in their gearboxes for a few years and had no issues and experienced improved gear changes. Personally, as a mechanical engineer, I think that there is a design flaw in the gearboxes and molyslip helps to downplay the results of the design flaw but does not elimiante it and over time could potentially cause it's own damage. 1 Quote Link to comment Share on other sites More sharing options...
pathfinder123 Posted May 30, 2013 Share Posted May 30, 2013 Thanks Jell36, It sounds like a lot of things in life, neither black or white... S. 1 Quote Link to comment Share on other sites More sharing options...
Stutopia Posted May 30, 2013 Share Posted May 30, 2013 Thanks Jell36, It sounds like a lot of things in life, neither black or white... S. Someone please write a definitive list of the life do's and dont's then mail it to me, circa 1990! Ta. Quote Link to comment Share on other sites More sharing options...
Jetpilot Posted May 30, 2013 Share Posted May 30, 2013 I raised the topic of Molyslip and Mark isn't a big fan of using additives in premium oils. Not a personal dig at you Tinyflier, but i do love statements like this and by that i mean the vagary of it all, especially when so many people seem to sign its praises. Perhaps some info to bolster the reasons would be helpful. Quote Link to comment Share on other sites More sharing options...
MartynB85 Posted May 30, 2013 Share Posted May 30, 2013 (edited) As for filling/ draining , you wouldn't be able to reach the drain plug through the gear stick area and not sure about top ip plug With a 200sx gearbox you can actually remove the gear stick, then pour the oil straight down the hole, instead of the filler hole. Quite a few people do this with them, just wondered if the same applies to the zed. EDIT: after looking at a few pics of a zed gearbox, the answer is no, it would be straight on the floor lol... Edited May 30, 2013 by MartynB85 Quote Link to comment Share on other sites More sharing options...
Tinyflier Posted May 30, 2013 Share Posted May 30, 2013 I raised the topic of Molyslip and Mark isn't a big fan of using additives in premium oils. Not a personal dig at you Tinyflier, but i do love statements like this and by that i mean the vagary of it all, especially when so many people seem to sign its praises. Perhaps some info to bolster the reasons would be helpful. I was passing on a comment from a very respected specialist whose advice I am happy to take. As I said others have had beneficial outcome through using Molyslip. If you contact Abbey I'm sure Mark will be willing to explain his reasons. David Quote Link to comment Share on other sites More sharing options...
Jetpilot Posted May 30, 2013 Share Posted May 30, 2013 I raised the topic of Molyslip and Mark isn't a big fan of using additives in premium oils. Not a personal dig at you Tinyflier, but i do love statements like this and by that i mean the vagary of it all, especially when so many people seem to sign its praises. Perhaps some info to bolster the reasons would be helpful. I was passing on a comment from a very respected specialist whose advice I am happy to take. As I said others have had beneficial outcome through using Molyslip. If you contact Abbey I'm sure Mark will be willing to explain his reasons. David I am sure Mark would love people phoning him to ask his views on the use of molyslip, why not just elaborate on what he said to you? Quote Link to comment Share on other sites More sharing options...
Tinyflier Posted May 30, 2013 Share Posted May 30, 2013 I raised the topic of Molyslip and Mark isn't a big fan of using additives in premium oils. Not a personal dig at you Tinyflier, but i do love statements like this and by that i mean the vagary of it all, especially when so many people seem to sign its praises. Perhaps some info to bolster the reasons would be helpful. I was passing on a comment from a very respected specialist whose advice I am happy to take. As I said others have had beneficial outcome through using Molyslip. If you contact Abbey I'm sure Mark will be willing to explain his reasons. David I am sure Mark would love people phoning him to ask his views on the use of molyslip, why not just elaborate on what he said to you? I did in my first mail. He doesn't believe using additives to high quality oils carries any benefit - I didn't seek to question him further as his advice to me in past has always been spot on. David Quote Link to comment Share on other sites More sharing options...
jell36 Posted May 30, 2013 Share Posted May 30, 2013 Jetpilot - why don't you phone Mark tomorrow and ask him and post his response on here so we can all find out. That way your curiosity is settled, the rest of us don't bug mark with the same questions and we will all be a little bit more knowledgeable. Tinyflier may not know the answer as he may not have asked. Personally I would trust Mark's opinion and if I wasn't genrally so inquisitive I wouldn't ask him why, I'd just take his word as being the truth. I porvided one of the most common reasons above. But as a second reason, Nissan and gearbox manufacturers spend a hell of a lot of time developing, researching, testing and designing a gearbox. Everything in a gearbox is done for a reason of function, by adding moly slip you are adjusting some of the performance characteristics of certain parts within the gearbox. There is a specific reason why Nissan (or the gearbox design team) chose the specific weight of oil that they did, there will also be a specific reason as to why Nissan didn't add molyslip to the gearbox oil as standard and there will be a specific reason as to why Nissan didn't coat parts of the gearbox in a low friction coating (certainly not cost as it costs pence when done in volume) or use a PTFE or graphite filled material. And so Mark's answer could well be simply because if Nissan thought it needed molyslip then they would have added it. Now don't get me wrong, designers do make mistakes but not as often as people like to think. There is a lot to take in to account in a gear box design like inertias, backlash, noise, vibration, efficiency, pitting, modal frequencies, mean time to failure, defect per million, wear, heat transfer, thermal expansion, rapid cooling and the list goes on and on. Personally, I don't know if adding molyslip is good or bad for the gearbox but it certainly appears to be a good thing short term (no idea about long term yet) but I would be very happy to conduct some tests if someone wanted to provide me with a few gearboxes free of charge that I can conduct destructive testing on. Honestly, throughout my career I have had it a few times where end users think they know better about the assemblies that I design, change something to "improve it" and then when it fails earlier than expected they stand, scratching their heads and wondering why, and never think that it could be becuase their change now means that the assembly does not conform the specification that I set and spent a few years researching, understanding, designing optimising, testing and validating. Quote Link to comment Share on other sites More sharing options...
Watshot Posted May 30, 2013 Share Posted May 30, 2013 But Nissan did see fit to improve the gearbox on the Zed, twice, afaik. So they didn't get it right first time, maybe the Molyslip addresses some of the short comings of the early box? Also, whilst one respected specialist may not be keen on it, another, Horsham Developments, sell it as part of a gearbox service pack, as does Zmanalex. I have no idea either way and would normally be happy to trust the advice of a respected specialist, but in this instance that doesn't seem to be clear cut. Quote Link to comment Share on other sites More sharing options...
Tinyflier Posted May 31, 2013 Share Posted May 31, 2013 I didn't intend to impune the opinions or findings of anyone else - I just passed on a comment from that was made to me, simply to voice an alternate view. There is always room in the world for different views/opinions and long may that continue - although a little bit of me wishes I hadn't said anything at all... Anyays all I can add is that this morning, my gearchange has never felt better. I'm happy with the work Abbey has done, if others are happy using Molyslip or Cowslip or any other additive/oil mix then great! David Quote Link to comment Share on other sites More sharing options...
gareth29 Posted May 31, 2013 Share Posted May 31, 2013 Just a couple of things - why do you need to change the oil anyway? Its not as if it get contaminated like the oil in the engine, or does it? I'm definitley goin to add some molyslip tho - another thought - isnt it fluid drag between the synchro cones that matches their speeds? If this operation relied on friction surely something like molyslip would stop them working almost entirely and you'd have a very crunchy gbox? Somebody please explain Quote Link to comment Share on other sites More sharing options...
Jetpilot Posted May 31, 2013 Share Posted May 31, 2013 I didn't intend to impune the opinions or findings of anyone else - I just passed on a comment from that was made to me, simply to voice an alternate view. There is always room in the world for different views/opinions and long may that continue - although a little bit of me wishes I hadn't said anything at all... Anyays all I can add is that this morning, my gearchange has never felt better. I'm happy with the work Abbey has done, if others are happy using Molyslip or Cowslip or any other additive/oil mix then great! David Spot on and couldnt agree more, had many tuners give me different advise in my 9 years and 5 cars of Rx7 ownership, as i am sure a couple of ex members that are now on here can confirm, the bitching that goes on within the Rx7 forums regarding tuning is at times laughable for adults, one of the biggest ones over the last few years was simply down to fuel pumps of all things. However, i still think, as you say, alternative comments or views are good, but need substantiating as to why, to allow people to form an opinion based on facts, not just "x said x about x" Just a couple of things - why do you need to change the oil anyway? Its not as if it get contaminated like the oil in the engine, or does it? I'm definitley goin to add some molyslip tho - another thought - isnt it fluid drag between the synchro cones that matches their speeds? If this operation relied on friction surely something like molyslip would stop them working almost entirely and you'd have a very crunchy gbox? Somebody please explain I would imagine its the heat and also possible metal wear/fillings that may collect over time Quote Link to comment Share on other sites More sharing options...
roscopervis Posted May 31, 2013 Share Posted May 31, 2013 I didn't add Molyslip to mine and used the standard Nissan oil for both the box and the diff. Huge difference. I used the Nissan oils as with the 200sx box they were generally regarded as the best to use for smoothness so carried this logic over. Quote Link to comment Share on other sites More sharing options...
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.