Noisy LSD.

[Cton]

So my car just had a full complete engine fitted under warranty,
Now the diff has the wong wong or whatever you want to call it, when its still cold, turning slowly (1st gear) but lightly on the throttle.
So my question is does the gearbox/LSD oil need to dumped when removing the engine? I know there is a few threads on this already so sorry for that, but from what i can gather the Mazda fix for this is using a penrite GL-5 oil instead of a GL-4? And in the long run this is no good for it, so does this wong/ whah noise even matter anyway? I know a few people use the Ford Motorcraft XT-M5-QS. Do i need to worry about fixing this noise or not?
Thanks in advance......

[Caffeine Fiend]

Damn, new engine???

Was this because of the oil leak?

[Yeldarb]

Yeah, I must have missed that whole story too. I've been watching your Oil leak thread, and then suddenly, ENGINE CHANGE? Crazy!

[Cton]

Porous engine block...

[SP23HO]

Welcome to the Wong Club Cton! .

Did they mess around with your tranny fluid at any point during the engine replacement (i'm not mechanically minded )?

Cuz my Gen 2 started getting the wong wong noise after a tranny flush....

They actually replaced my whole transmission.... but then a few wks later the noise was back. I'm due for a service in November so i will discuss the matter with my service department soon.

Let me know if u find a solution Cton, its driving me mad

[Jmac]

Its normal...
You get used to it .

[Cton]

My worry is that it did not do it before. So why does it now? Have they used a different fluid?

[Nexus]

Mine didn't do it new. It developed it after thousands of K's, can't recall how many. I've been happy with the penrite SYN-75W90 (? - check that) as a solution. Yes it's a GL5+ oil, but if you read the specs carefully you'll note that it meets the requirements of the diff and gearbox (often GL5 generally don't), and while I was briefly concerned about long term effects, the penrite is compatible with copper alloys (a GL5 specific concern), and meets the LSD needs. Shifts are cleaner quieter and I've not seen any sign of the LSD struggling because of it. When I uptune, I'll pay closer attention to that again and if I think the LSD is going to struggle, I might pull back to a GL4 and put up with the noise, but I'm happy enough with the penrite for now. I don't believe it's doing any damage. People might slag mazda's support off from time to time, but I'm fairly confident they did their homework choosing the penrite, as I haven't found another GL5 yet that specs as well for use in the MPS.

[SP23HO]

Hey Cton,
Any update on this issue?
Or just too busy respray your wheel?
Looks awesome BTW

I'm due for a service soon so i will be bringing this matter up again.

[Cton]

I rang them about it and he was going to call me back. That never happened, Ill have to try sort it out myself, thanks once again Mazda!