Hi All, Had a happy gearbox, now its unhappy... Working just fine, 115k miles.. Had the gearbox oil/filter/plug changed by a good indie (as advised by an autobox specialist a while back, (preventative maintenance)). Drove to Cornwall for a week break, no issues, excellent changes etc. On the way back noticed a little dampness on the undertray... not sure why looked under the car but i did, didnt think much to it. Following day, noticeable smoke (ATF getting onto exhaust) and pretty significant leak. Checked level with dipstick, just above the bottom cold so added 100ml increments until back into correct range and drove maybe 10 miles gently to garage. All changes etc still perfect. Garage checked plug o ring again as we thought that was the leak, turns out not, its blowing fluid out of the breather on top of the box, and pretty significantly now. Id be quite surprised and disappointed if the gearbox has suffered a major failure internally, its been looked after, and only on 115k miles. ATF was previously changed at around 40k miles as was the consensus to do at the time. Our other cars with 722.6 box are all over 200k without issue, bar one which had a TC fail at 220k ish, and had not had any oil changes. Anyone know what could be going on? Thank you!