Originally Posted by inais
i put gl-5 in mine recently. wasnt aware there was too much difference, walked in and got any old thing that said gear oil and was cheap.
my gear box is already stuffed according to a mechanic, still stays in gear fine, just playing with the back passengers feet in 2nd and 4th. alot of play there.
People...there is a lot of missinformation floating about oils for trans.
The vast majority of modern gearbox oils WILL NOT ruin or affect synch rings or any other part of the gearbox!
These days the correct oil is a GL5/6 75/90
I use this plus a box additive which has made for slick gearchanges...something the Hyundai is not famous for