[TheBarbarian]

anyone ever replace the whole drive train oil in there unit at 1000km?

Yes i did , Front and Rear Diff oil were atrocious. The manual transmission oil wasn't too bad.

Just picture a dark fluid but extremely silver in color dropping out ...thats what it looked like. it was mainly just residue from the break-in process but nothing i would want circulating in the system for any more then 5000km

[Here's what it looked like]

 

[TheBarbarian]

what fluids did uou to replace or did you use the oem fluids

OEM Fluids , i have not been particularly bothered to try aftermarket alternatives as currently i find OEM to be very cheap , front diff only needs 450ml of liquid and the rear only 500ml. so per change for both you would use pretty much 1 liter container (1000ml) which for me is only $47.50 AUD , for something you should change every 3 track days or realistically every 15-20k depending how hard you push your car its really cheap.


As the old saying goes , Fluids are cheap , Mechanical parts when they break ...are not.





Here is the original diff oil thread
For Convenience Pack cars (the bulk of the GRY sold here in Australia , without LSD) we use the API GL5 75w-85 Gear Oil (LT) both Front and Rear diff.

The Circuit Pack GRYs (primarily sold in UK , with LSD ) use the 75w-85 Gear Oil (LX) for both Front and Rear diff.

 

[TheBarbarian]

looking at replacing tranny gear oil with motul multi dctf fluids / transfer case motul motyl gear oil 75w90 n rear diff with redline 75w90

Why would you put a Dual-Clutch Transmission Fluid (DCT) into your Manual Transmission gearbox @Sc0oby? , i think i remember using that oil on my Ford Focus RS even though it was a manual but that was specifically because it required the "WSS-M2C200-D2" specification ..i haven't looked but i am pretty sure Toyota would not warrant it unless i am mistaken?

Also putting slightly thicker in the Transfer and Rear , going from 75w-85 to 75w-90 isn't going to make a noticeable improvement on the protection front and you would also possibly be increasing drive train losses with the thicker oil which will shoot-up fuel consumption.

Few members on this forum have taught myself that bigger isn't always better and that there is specific reasons why OEM fluids are specifically fit for purpose.