Jump to content
SAU Community

Recommended Posts

Anybody used Penrite SIN 75 (75x90) gearbox oil or have any comments on it ? There is also SIN 80 (80x140) which may ? be a goer for summer--or not ?

I'm thinking of using it in my R34GTT as I used Penrite 10/10 SIN in a WRX gearbox a fair while ago and it worked well but for a Skyline well , I know nothing :P

Link to comment
https://www.sau.com.au/forums/topic/290069-penrite-sin-75-sin-80/
Share on other sites

i put sin 75 in mine the viscosity u list isnt wat the bottle has on it it said 75-85.... had it in for 5000k's on a freshly rebuilt and cryod box and afta doing sum near on 250km an hr runs the box has developed a mad whine.... admitly the car has 402rwkw atm but still. not blaming the oil could just be a part failure. but just letting u know. sound only developed afta extended periods at very high speeds

i put sin 75 in mine the viscosity u list isnt wat the bottle has on it it said 75-85.... had it in for 5000k's on a freshly rebuilt and cryod box and afta doing sum near on 250km an hr runs the box has developed a mad whine.... admitly the car has 402rwkw atm but still. not blaming the oil could just be a part failure. but just letting u know. sound only developed afta extended periods at very high speeds

Thanks mate, I think you might find that the 75-85 is a synthetic blend, the labeling is a bit deceptive. The sin 75 is a fully synthetic product and carries 75-90 printed in smallish letters on the lower left side front here's a link http://www.penriteoil.com.au/products/gear...sin_gear_oil_75 the SIN 75 is about $55.95 for a 2.5lt bottle the 75-85 blend is around $28-32 for 2.5ltr, I think , I know I nearly bought the 75-85 just on bucks but decided to bite the bullet as I'd only change the gearbox oil evry 12-15 months as I do bugger all klms.

I changed all my oils today, motor/gearbox/diff and I used the penrite SIN 75 in the gearbox so I'll post if it goes crook. I've got a 98 R34GTT with 80000ks on it which I think are genuine.

I've got a fat exhaust but wont be going beyond a Nistune motherboard and tune when it comes to more mods so it won't be working that hard.

:cool: Farkin bad news on the box, what gearset are you using with that much kws ?

decided to bite the bullet as I'd only change the gearbox oil evry 12-15 months as I do bugger all klms.

Fully synthetic in a gearbox should be good for 300,000+kms. So no need to ever change it again!

sin 75 and sin 80 are hypoid diff oils. not sutible for your gearbox. penrite manual gear 70 is the corect oil.

;) Hmm, not acording to Penrite when I phoned them, unless of course I misunderstood which is not beyond the realms of possibility given that I'm an ole fart. :)

Not doubting you on this but the oil that came out was a deal heavier than 70 grade and its a 5 speed box.

Penrite sez:-

SIN GEAR OIL 75

Synthetic gear oils engineered for maximum protection, life and performance. Use for transmissions and differentials for all types of high performance cars. SIN Gear Oil 75 has been specifically enhanced to survive the extremes of V8 operations.

Exceed API GL-5 and GL-6.

Package and Code:

2.5LSING750025 20LSING75020

AND

MANUAL GEAR OIL 70

A great synthetic performance gear oil featuring new generation technology. Suitable for many modern 6 speed manual gearboxes where originally a synthetic or mineral automatic transmission fluid was specified. Ideal for T-56 manual transmissions and VW/Land Rover gear boxes.

SAE 70W-75, API GL-4 Plus, BOT338

Package and Code:

2.5L MGO70750025

20L MGO7075020

Edited by BASHO

My dumbass way of looking at these similar oils is;

GL-4 for is best suited to gearboxes

GL-5 for is best suited to diffs

and unless i have a good reason to do otherwise, I use the manufacturers recommended viscosity (so i probably wouldnt use 70W-75 in my gearbox)

:) Love the methodoligy.

I have absolutely no idea what the OE spec for the R34GTT gearbox is if you could post it up it would be of great help as after huge searching on here many others don't seem to know either.

After refering to this post http://www.skylinesaustralia.com/forums/Tr...ts-t205993.html I then phoned Penrite and asked them what thier equivalent to Syntrax 75-90 was as I had used Penrite 10/10 which they no longer make and was happy with it , thier advice was SIN 75.

Penrite also didn't have an oil spec'd specificly for an R34GTT manual gearbox as such.

i use penrite Sin Gear 75 in my silvia 5 speed, and my differential. but i have a vicous LSD... i'm not sure about skylines though. it's been in there since i had the car, gearbox still feels good, no crunching. LSD still hooks up pretty good.

OK , the SIN 75 feels way to heavy for the gearbox in my R34GTT the gearchange is sluggish and the selectors work way to hard going from the snick to a clurk noise when changing gear noise , I've hoyed it out and have gone with a straight Nulon 80 smooth shift on the basis that Castrol recomend VMX 80 or VMX 75/85 and I couldn't find any on the shelf on Sunday, this again is a Hypoid which is probably another wrong'n.

I'm going to phone Nissan and see if I can find out what wieght of oil they would put in if they were servicing it , which they won't.

:P wish me luck :(

Edited by BASHO

IIRC 32 GTR, 33 GTR, 33 GTST and 34 GTT gearboxes have pretty much the same internals, with some minor revisions along the way (ie extra syncros on third in series 3 33 GTR). The 32 GTR spec is 4.1 liters of 75W-90 GL-4.

IIRC 32 GTR, 33 GTR, 33 GTST and 34 GTT gearboxes have pretty much the same internals, with some minor revisions along the way (ie extra syncros on third in series 3 33 GTR). The 32 GTR spec is 4.1 liters of 75W-90 GL-4.

:( Thanks for that, I actualy found out from Nulon that the spec is GL4 75w-90 , Nissan wouldn't tell me and had no oil to sell me iether, made me feel a bit like Oliver Twist. -More Mr Beadle please sir ?

A bit of perhaps useless infi on gaerbox oil specs according to Oil Mfrs for the R34GTT.

CASTROL--------VMX 80 OR VMX-M 75w-85

MOBILUBE-------XHP 75w-90

NULON----------75-85 full syntnetic SMOOTH SHIFT.

I'm now puzzled why my gearshifting was so heavy if I use 75w-90 was it because I used oil with Hypoids in it ? WTF are hypoids anyway, everyone I ask looks sheepish and changes the topic.

This is of course is intended in the style of Clarkson , Hypoid what is Hypoid is that an oily steroid ? etc

Does this help? hypoid lubricant for read (sic) differential?

Apparently hypoid oils are for hypoid gears ....

Thanks, helped mighty, bottom line is that synchromesh gears dont like Hypoid oil hence the syncro drag, for want of a better term, that I am experiancing though as I understand it hypoid oil would actualy be a stronger option wieght for wieght than non Hypoid , also interesting is the fact that GL4 is now considered obselete.

After running around all the local Autobarns, Suercheeps, Repco's etc I found that GL4 75w-90 non hypoid oil is rarer than rocking horse shit, in point of fact I found none.

This may explain why no oil manufacturer specifys 75w-90 , they just don't have it , so they spec 75w-85 or whatever they have thats sorta nearest--how encouraging :cool:

Except good ole Mobil who do 75w-90 GL4-------- in 20ltr drums , go to Kingdom OZ to actualy get even that, although I was told somewhere in Burliegh may have it.

I was offered Redline light at $160 3.85ltr bottle by Bursons but have been told that this has a habit of turning to cheese and requires a gearbox rebuild to actualy get the stuff out .

I now have even less of an idea what the best oil for this gearbox woud be than when I started.

  • 3 years later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • There's restrictor pills in the stock boost control hoses. That's how they set the amount that was bled off and hence the "high" boost setting. The usual mod in the day was to remove it and send the "high" boost setting up to about 14 psi.
    • Thanks Duncan, that's the best info I've read. Furthermore after learning about the PCM programming side controlling the factory boost solenoid, the purpose of the solenoid is to "bleed" boost when pin 25 is earthed, thus allowing spring pressure in the wastegate actuator to overcome diaphragm boost pressure, thus closing or reducing the position of the wastegate flap creating more boost as the turbo is able to spin faster. It's pretty cool to see a designated Pill to do exactly this, would have liked to have seen it with a tiny filter over the end for those moments in vacuum.  The constant bleed pill has now been removed completely from the system and solenoid boost control has been restored once again.   Case closed 😂
    • The wideband reading is meaningless if it's not running. Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that? Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.
    • Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours. Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
    • Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
×
×
  • Create New...