mine lost 2nd gear at about 80,000 miles. was hard to go in or out of 2nd the day before and noisy while in 2nd. it went out on my way home, was just about to hit the clutch for 3rd gear and there was this BANG noise. i held the clutch in and coasted around the next corner to a stop to see what gears (if any) i had left. everything worked but 2nd, the lever would go into the 2nd gear postion but it was just a extra netraul. didnt really see much when i took off the top cover, the first gear on the input shaft looked a little bad, it was low on oil when i bought it, but i had it for a year and about 20,000 miles before it broke. one of the first things i did was change the trans oil and i check it every oil change. was 1,100 for a rebuilt M5OD, about 500 for other parts, i put a new clutch, pressure plate, throwout bearing and hydraulic slave cyl. havent had any issues with this trans besides it not wanting to downshift, but ive found that if i quickly tap the throttle with the clutch in as i go to downshift, it goes right in. upshifts o.k. only noise is the normal noise you get when you run a hurst shifter. on the other hand, my '88 2wd s/c had over 200K on its M5OD trans without any issues. shifter was sloppy towards the end, but i didnt know about the plastic bushings back then.