Hi guys, just bought my first car, an 05 Celica GT, and I've noticed the gear changes are notchy and not smooth (although it does go into gear everytime). The car is on 114k miles and as far as i know the transmission oil hasn't been changed all it's life. After trawling this lovely forum I'm set on flushing the tranny and putting in MT90 and molyslip additive. Is that a good idea? I've seen some people say it might make things worse?

Last edited by GT_Saeed; May 20, 2020 11:27am.