F10 gearbox acting strange, need a reliable shop in Musaffah

[jameshill]

My 2014 520i started jerking between second and third gear last week and now there's a faint whine when I accelerate from a stop. I did the usual thing first, checked the fluid level and scanned for codes, but nothing clear came up. A friend told me it might be the mechatronic unit or maybe just old fluid, but I don't want to guess and make it worse. I've asked around a few garages in Musaffah and got mixed answers, one said rebuild, another said replace the whole box, which honestly scared me a bit. At this point I just want a trusted BMW gearbox workshop in Musaffah that has actually worked on these ZF transmissions before and won't treat my car like a science experiment. If anyone has taken their BMW to a place they genuinely trust for gearbox work, please share your experience, especially if the issue was similar. I'm not in a rush to spend a fortune but I also don't want a cheap fix that fails in two months.