I didn't notice any difference with new trans oil per say MT-90 for normal driving especially in squeaking noise or shifts. Only when I pushed the Celica hard and I mean hard for long period of say over at least 5 mins. that I noticed a difference and not with noises or a sh*ty shifter. Also, how many people that drive Celicas have a transmission cooler? I would love to install one and an oil cooler and Prodrive pump with a baffled oil pan.
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