Penrite oil for T56

[Micks]

Know it's an old thread & all, after selling my Tonner & now driving a 6L Crewie M6. Following a great motoring/changes with the Penrite 70 gear oil.
I decided it was time to do the Crewy. The old atf I drained from it today was horrid! No metal particles in it though.
Put the latest Penrite gear oil in 70-75 fully synthetic. Took it for a run & noticed it has quieted down a little & very smooth shifting. But do remember it took a few days last time I used to to see any real result.

[VZ_V8]

I forgot about this thread. Well I had my 22,000km old sample of MGO70 tested by Mainlube to see how it was holding up.

My ute gets used on track days and cops a fair hiding so I was expecting the results to be not too great however, the results showed it was in fantastic condition.

The oil was in the very early stages of forming Dark Metallo-Oxide and Black Oxide Particles which are formed when the machine is over-driven beyond the capabilities of the lubricant. From what I understood when speaking to Aaron on the phone was these particles are up to 100 micron in size whereas the load zones in the gearbox have a 3 micron tolerance and as such wear occurs to the metal surfaces when these particles are forced through the load zones.

Essentially the outcome of the report was the oil has been holding up fairly well but it's recommended to change the MGO70 at 20,000-30,000km intervals to minimise the amount of Dark Metallo-Oxide and Black Oxide Particles floating around in the box.

[Micks]

That makes sense as the last two M6's Ive owned changed them around 75K & I'm sure both were on their original atf
& were very black & not so pinkish as atf should be!

[The_Senator]

It would appear MGO70 has been replaced by a new product from Penrite.. It's now Pro Gear 70W-75.. Still recommended for the T-56.. About to put some in the transmission to replace the MGO70 that's currently done more than it's job..

[Micks]

It would appear MGO70 has been replaced by a new product from Penrite.. It's now Pro Gear 70W-75.. Still recommended for the T-56.. About to put some in the transmission to replace the MGO70 that's currently done more than it's job..

That's right the latest gear is fully synth.

[BLACKVE]

So just ordered 5lt of Penrite manual gear 70 off the internet through MotoFluid. $48 for 2.5lt. Total for 5lt and freight was $104. Autobarn and Repco were saying $59 for 2.5lt.

Just did my VE today, not sure why but got the 2.5L for $41.95. Store owner has a T56 and stocks it so may be sells a bit and therefore good $$$. Every where else doesn't stock it. Sprint Auto a mob in SA

[feistl]

Hey guys,

Big bump, but better than starting a new thread. (Question at bottom, rest just background info).

So basically i converted my VY Berlina Wagon to manual using a T56 donor from a low km VU ute. As the VT/VX/VU shifter pattern is slightly different to the VY/VZ (15 degree rotation) when i fitted up a brand new VY HSV GTS short gearstick ($430 worth) it was out of alignment. I really didn't want to pull the knob off and reglue it (which is what most people do) so decided to fit a ripshifter instead.

I used some Transmax Z (The original formula) that i was given when i purchased my T56 Magnum (I obviously used mainlube oil). The gearbox was pretty good for a few kms, but it appears the ripshifter was harsh on the syncros cause the 3rd/4th syncro key broke and jammed the gearbox. So pulled it out and rebuilt it with new syncros, billet keys and outer shifters and did an overhaul of the box. When i spoke with Mal Wood (Who supplied the parts) he said that the new transmax Z stuff is shit, and i should use Dex3.

So i fitted the gearbox back in and filled it with Dex3. For the first few kms it was ok, but after about 1000km its becoming REALLY notchy when changing gears, almost to the point where the harsness through the gearstick hurts my hand. (Well obviously its not massive pain, but i certainly feel it).

So i am going to change the oil again, i am just trying to decide what to use. I really want to use Mainlube, but considering this is a daily driver i have already spent faaaar too much on it (Just did a brand new diff with a Trutrac and 3.91 gears) i would like to spend a bit less. The car is a daily driver (although does get driven hard as its Injected LPG so bloody cheap to run), but wont see any track time.

Question - Is Nulon Pro Gear 70 from Motofluid still the way to go? Its currently $48.30 per 2.5L bottle. Luckily they are within 10 minutes of my place so i can swing past after work.
If i do use Nulon Pro Gear 70, is it worth adding some Nulon G70 as well, or is it not required?

Cheers, Errol

[Smitty]

if you are going to MotoFluid.. get their Penrite gearbox oil for the T56.. think it is the Pro Gear 70 (but def ensure it is for T56)
it is better than the Nulon .. I used the Penrite in the box in my old VE SSV and it is far better than even the Dex (and no additives needed)

[LS1 Tonner]

I use the penrite pro-gear 70-75 in mine as well.
Definitely shifts a lot better with this than the Dex 3 that was in it. Also have a ripshifter fitted
It actually specifies it is suitable for use in the T56 on the back of the bottle

[Micks]

Yes I use the Penrite 70/75 in mine...which reminds me is due again very soon!

[jc_sv8]

me too...

In this thread http://www.ls1.com.au/forum/showthre...-speed-T56-oil

[feistl]

Update:

Change the oil over on the weekend and the difference is simply amazing. The old Dex3 oil (When i say old, i mean around 500km) was like water (unbelievably runny) and was a dark burnt colour. I am hoping/praying that the gearbox hasnt suffered much damaged.

Since putting in the penrite its much much quieter, the shifts are 400% better and the feel is what i would expect a gearbox to be like.

I am actually pretty annoyed at Mal Wood (Its not the first time his advice is wrong), i might even give him a call.

Anyway, for anyone with a T56 i highly recommend changing your oil over to Penrite (if you cant afford mainlube).

Cheers

[mechatron]

Sorry I know this is a thread dig but is everyone on here still using the Penrite gear oil for their T56 or have they gone back to Dex3?
Also how often is the gear oil in the T56 meant to changed (km wise / time wise)? Thank you

[Smitty]

.................. is everyone on here still using the Penrite gear oil for their T56 or have they gone back to Dex3?
Also how often is the gear oil in the T56 meant to changed (km wise / time wise)? Thank you

yes, stayed with Penrite
and .. never (but I change mine every 20,000)

[Micks]

I will never go back to atf in either of my M6's the Penrite gear oil is perfect.