I've been speaking to a Kia master tech and he says that the oil specified by kia for my syncro problem (as it's quite a common problem in kia gearboxes) is traxium 6 75w85 but has been superseded by the traxium 9 75w90 and the guy I spoke to from total says it's fine for yellow metal although...
I've purchased some oil specified for my car from my local kia dealer parts dept. total traxium duel 9 fe 75w90 only I'm a bit confused as it says its suitable for gl4 gl5 mt1 how can it cover all those I thought gl4 and gl5 are completely different? it's also SAE J2360 which is the highest...
What's best for a bit more baulk/blocker ring friction thicker or thinner gearbox oil? I've tried redline 75w80 and 90 with not much difference 1st to 2nd is still notchy