Autoblog and Yahoo may earn commission from links in this article.The Humble (and Reliable) Stick ShiftManual gearboxes still have one big advantage over modern transmissions: they keep things simple. At heart, a stick shift is mostly metal and gears. There’s no digital trickery, no software second-guessing your choices, and usually, fewer wallet-draining surprises when something breaks.This simplicity is why manual transmissions continue to enjoy a reputation for durability. Keep them filled with fluid, avoid abuse, and many will outlast the rest of the car. Better yet, if something breaks, most can actually be serviced instead of treated like an expensive sealed box of sadness.AdvertisementAdvertisementA teardown video from I Do Cars put that reputation to the test by opening up two old Mazda-sourced five-speed manuals from a 1997 Ford Probe GTS. The car may have worn a Blue Oval badge, but the gearbox was pure Mazda G-series, the same type found in Mazdas from the same era. The goal was simple: find out what finished off these transmissions.Plenty of Signs of AbuseThe teardown started at the fifth-gear access plate, a spot gearheads know for quick servicing or swapping highway ratios. One gearbox looked rough right away, with metallic flakes floating in old oil. The other was much cleaner and, at first glance, seemed like it might have a fighting chance.The first gearbox was a mess – the differential had blown itself apart from the inside. No, this wasn’t just a case of a worn synchro or chipped gear. Spider gears were shredded, the carrier was damaged, and bits of metal were scattered everywhere. As the host concluded, years of hard launches, wheel hop, and general abuse had finally taken their toll.The second transmission was almost boring by comparison. The fluid was dirty, and there were signs of wear, but most of the gears looked fine. There were marks from age and use, maybe some grinding or heat, but nothing major. This one could probably be rebuilt without too much drama.I Do Cars/YouTubeView the 4 images of this gallery on the original articleSo What Actually Ruins a Reliable Manual? You.The real lesson isn’t that these gearboxes are weak, but that abuse adds up. Manuals are tough, but not bulletproof. Resting your hand on the shifter, doing too many launches, skipping fluid changes, or letting the wheels hop all put extra stress on the parts long before anything actually breaks.AdvertisementAdvertisementIn the end, Mazda’s old five-speed is just what people remember: tough, fixable, and hard to kill. Just don’t expect it to survive a lifetime of questionable driving choices.FordView the 4 images of this gallery on the original articleThis story was originally published by Autoblog on Jun 1, 2026, where it first appeared in the News section. Add Autoblog as a Preferred Source by clicking here.