Well, I stand corrected on a few elements after having a chance to dig into a 6060-MM6.
- All 6 gears are linked to the output shaft, unlike a split configuration in regular immersive lubrication transmissions.
- There are no metal or brass syncros, but rather a wet disc clutch design similar to an automatic transmission. The clutch is glued in place and is water soluble. If a mild amount of water enters the transmission case, it will damage the syncro disc and can cause grinding during gear changes (hence why I will now change my fluid once a year).
- Lubrication is tied to the input shaft. Coasting in neutral while the clutch is engaged will not adversely affect the transmission since all gears are linked and moving at the same speed, no damage will occur.
- Coasting or towing in with the following conditions will damage the transmission due to a lack of lubrication: coasting for extended periods while the clutch is disengaged, or towing the vehicle with the rear tires on the ground and the drive shaft still connected to the transmission.
- There is a ring magnet to capture ferrous materials but to access it you have to disassemble the transmission case.
I'm not sure how many have the courage to say or do the right thing. But if I am wrong, I will admit it and correct it. I hope this helps and again "I stand corrected".