Bugeye Gearbox/Diff advice

[myles1972]

I have a Bugeye WRX and noticed the other day a whine/drone that was only present in gear, and when I had 'warmed' it a bit! When I depress the clutch the sound goes away. I also noticed that the box seemed to be a little rough on slowing down in gear.

I have 5L of that Millers CRX 75w90NT gear oil to replace the old oil, how do the box and diff react to the change, chances of the drone disappearing?

Im running approx 310bhp as well, so hopefully not too much power/torque for the 'box.

All advice gratefully received.

(I know, noise diagnosis is nearly impossible but humour me!!)

[myles1972]

Anyone?

[myles1972]

Cheers guys! I was recommended the Millers and got it for a good price so I'll change that before thinking of mechanical changes. Just to work out how to get the gear oil down the dipstick now!!