Gtir Motorsport club

Welcome to the largest Nissan Pulsar & Sunny GTI-R Forum. Masses of info, friendly members, cars for sale, lots of spares. Best forum on the net by far. Everything your gtir needs is here.


You are not connected. Please login or register

Gtir Motorsport club » Tech room » Gearbox section » Why cant gearbox and transfer box oil mix?

Why cant gearbox and transfer box oil mix?

Go down  Message [Page 1 of 1]

1Why cant gearbox and transfer box oil mix? Empty Why cant gearbox and transfer box oil mix? on 14th February 2016, 9:02 pm

Cosmic73

Cosmic73
Ive just discovered (on this forum) that both gearbox and transfer box require the same type of oil, MT90 75/90 semi gl4

So why arent they simply allowed to share oil?
If the oil from the gearbox leaked into the transfer box, what harm could it do?
Just curious that's all,
anyone?

2Why cant gearbox and transfer box oil mix? Empty Re: Why cant gearbox and transfer box oil mix? on 15th February 2016, 9:10 am

Mr B

Mr B
gtir technician
gtir technician
You have 2 seals & a drain cavity between 2 so you never going get fluid from one transfer to other .
In a case where fluids where lost or gained only issue when fluids same spec would be from low oil lack of lubrication & high oil excessive pressure & drag . Design criteria such as optimizing oil levels for each, allowing different spec oils when lsd front diff used, reducing damage & wear in transmission components from fragment debris carried in oil probably part reason for the choice.

3Why cant gearbox and transfer box oil mix? Empty Re: Why cant gearbox and transfer box oil mix? on 15th February 2016, 9:36 am

Cosmic73

Cosmic73
@Mr B wrote:You have 2 seals & a drain cavity between 2 so you never going get fluid from one transfer to other .
In a case where fluids where lost or gained only issue when fluids same spec would be from low oil lack of lubrication & high oil excessive pressure & drag . Design criteria such as optimizing oil levels for each, allowing different spec oils when lsd front diff used, reducing damage & wear in transmission components from fragment debris carried in oil probably part reason for the choice.

Cheers Mr B, that makes sense to me
Very Happy

Sponsored content


Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum