NULON GL4 gearbox oil

Anyone here used this gearbox oil
seems to be the right spec for the MR2 box and says its fully synthetic as well
remember reading somewhere not to use synthetic in the MR2 box on MR2oc but then again lots of them are running redline GL5 synthetic and saying its the best [?][?][?]

http://www.nulon.com.au/products/Full_Synthetic_75W-85_Smooth_Shift_Manual_Gearbox_and_Transaxle_Oil

going to change the box oil soon if anyone has used it please post findings here.

cheers

yeah im sticking to GL4 which is why im askign if anyones used the above mentioned oil as its a GL4 rated oil but its fully synthetic and i read somewhere on MR2oc not to use synthetic transmission oil thats why im asking

my exhaust has a custom B pipe with a cat in it which ids very close to the gearbox and oil pan so after a hard drive 1 hour or so the gearbox shifting isn't that great so im contemplating synthetic due to higher temp tolerances

cheers

Ian
have castrol VMX something in it which is a GL4 rated oil
i find it hard to get the car into 1st gear at any given time warm or cold
plus shifting into 2nd is also hard and notchy never had all this problem when i was running LSD oil in it which was GL5 apart from having difficulty shifting in cold

will a 75-85 be much different to 75-90????
what other synthetics have the same 75-90 i havent found any except for MT90 which apparently isn't as good as lightweight shockproof (which is a GL5)

any problem with bearing noise etc

i also found this
under gear lubricants - they have a proper 75w-90 gl4 oil
http://www.royallubricants.com.au/automotive.html

wonder if its any good ive never heard of the before but its not too far from me.
i priced up a 5 litre bottle @ $21 pretty cheap

cheers

Yeah, oil threads can tend to get nowhere.

But here is a site that seems to explain fairly clearly why you should not use a GL5 oil, for anyone who doesn't know already.

http://www.widman.biz/uploads/Transaxle_oil.pdf

quote:

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Originally posted by purple5ive

well its not that simple when a Mechanical LSD is involved.

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Not trying to over-simplfy your issue here, just that there's no definitive answer when you introduce a clutch type LSD, particularly if it's tracked or runs high operating temps. Good reason to stay with a viscous type.
You can't effectively protect all 3 components: hypoid gearset (EP90), syncro's (SAE 75w/90) and clutch pack (ATF type) without compromise.
Plus some super lube trans oils use a molybdenum additive which is exceptionaly good with gearsets but hell on syncro's..and clutches.
Honestly, I'd stay with a good brand, straight GL4 rated 75w/90, in a synthetic if you can find one, for the extra temp rating, and put up with a bit of clutch chatter.
Maybe try a custom heat shield on the cat if you don't have one. already.

and yeah might try the heatshield on the cat dont have one atm but have been thinking about it

cheers