FWD M32 with Drexler LSD - oil ?

[headoff93]

Hi everyone.
I decided to change my gearbox oil for first time M32 gearbox with Drexler LSD.
The old one was original GM oil(yellow).
After 2000km with AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube I have little bit noisy diff(it's very hard to hear if you are not mechanic) when I'm taking off from first gear and have turned the steering wheel(not full).
I called GM and asked them, but they say "We don't have different oil for M32 with Drexler and without Drexler)
Is that oil suitable for me or I should change.
Also I have Motul gear 300 ls 75w-90 and Millers-CRX75w90-NT-LS in my garage.
The car is Corsa E OPC.

 

[Jetronic]

Limited slip differentials need limited slip additives, but nobody can tell you how much. You will likely have to add some to whatever oil you want to use, or keep trying LS oils until you find one that has enough. But the additives exist and you can just add as needed.

 

[97prizm]

I use RP differential oil as it has the lsd additive already in it. Never had an issue with the lsd in my Mazda rx-7.

 

[headoff93]

I'm living in Europe so Royal Purple is impossible to find here.
I can order from UK, but it will take some time.
Also it's little bit tricky, because my LSD is in the gearbox together with everything.

 

[Jetronic]

doesn't matter, you can add LSD additive to any gear oil you like. Don't use differential oil in a manual transmission would be my advice.

 

[headoff93]

doesn't matter, you can add LSD additive to any gear oil you like. Don't use differential oil in a manual transmission would be my advice.

Of course not diff oil.
Just I want to know what gearbox oil.
Drexler is plate type LSD.
Can I put LSD additive to my current oil or I need to put oil with LS specification.

 

[Jetronic]

you can put lsd additive in your current oil. There's no guarantee an LS oil will have enough additive in it either.

 

[kschachn]

@MolaKule may have a suggestion here.

 

[MolaKule]

Hi everyone.
I decided to change my gearbox oil for first time M32 gearbox with Drexler LSD.
The old one was original GM oil(yellow).
After 2000km with AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube I have little bit noisy diff(it's very hard to hear if you are not mechanic) when I'm taking off from first gear and have turned the steering wheel(not full).
I called GM and asked them, but they say "We don't have different oil for M32 with Drexler and without Drexler)
Is that oil suitable for me or I should change.
Also I have Motul gear 300 ls 75w-90 and Millers-CRX75w90-NT-LS in my garage.
The car is Corsa E OPC.

In an attempt to get on the same page, the question is: Is your "gearbox" a transaxle, a transverse mounted unit with an integral Drexler LSD that specifies a 75W90 grade gear oil?

 

[headoff93]

In an attempt to get on the same page, the question is: Is your "gearbox" a transaxle, a transverse mounted unit with an integral Drexler LSD that specifies a 75W90 grade gear oil?

It's FWD car, transaxle gearbox with LSD inside.

 

[MolaKule]

It's FWD car, transaxle gearbox with LSD inside.

Ok from what I can see of the exploded view, the Drexel is a spring-loaded clutch-type LSD.

If you are experiencing "chatter" or noises on tight turns, then add, in increments of 2 oz each time, an LSD additive until the noise disappears. Don't overtreat it.

After adding each increment of LSD additive, drive it around using tight turns and listen or feel for any chatter or noises.

If that doesn't address the issue, then your noises may be coming from the transmission itself.

 

[headoff93]

Yes it's plate type and that was my question.
Can I just continue to use AMSOIL 75W-90 Manual Transmission and just put Amsoil Slip Lock or LSD oils which have LS in the name are different and it's not only about the friction modifier additive.

 

[MolaKule]

Yes it's plate type and that was my question.
Can I just continue to use AMSOIL 75W-90 Manual Transmission and just put Amsoil Slip Lock or LSD oils which have LS in the name are different and it's not only about the friction modifier additive.

I don't understand the bolded part of your response.

The answer to the first part is yes!

No gear oil with an lsd additive can promise that it has enough of a level of the lsd chemistry such that it can satisfy the internals of a specific lsd differential, hence such products as Slip Lock are used.

LSD differentials shear the heck out of gear lubes so more frequent changes are needed.

 

[headoff93]

Thanks for the answer, so I will put Slip Lock and check for the noise.
Also I asked Drexler and I'm waiting for answers.