Changing Tranny Oil T Sport 190

[kermit_gor]

hi there, recently i have bought a celica tsport 2003, very happy with it, but one problem is that i find the gears not smooth at all, especially going into gear 1 or into reverse, also the steering seems heavy, So i have decided to change the tranny oil and power steering fluid.

So my question is, which transmission oil would you recommend? i have read guides on how to change it, but they suggeests to use Redline MT90 which can only be found in the state, and very costly. What is the procedure in flushing the old gearbox oil prior to filling the new ones in?

I have come across this product on eBay.

http://www.ebay.co.uk/itm/Mobil-1-SHC-75w90-manual-gearbox-transmission-differential-oil-fluid-1L-BMW-Audi-/140626005526?pt=UK_Vehicle_Oils_Lubricants_Fluids&hash=item20bdf68e16

vs.

http://www.ebay.co.uk/itm/Mobil-1-HD-80w90-manual-gearbox-transmission-differential-oil-fluid-1L-BMW-Audi-/130595028133?pt=UK_Vehicle_Oils_Lubricants_Fluids&hash=item1e6811fca5

are they decent to use? also is it ok to use 80w over 75w for the celica? since its doubled the price for 75w. cheers