Salaried employees are expected to work lots of overtime with no real compensation for the "extra" effort. Plan on a 50 hour week minimum and factor that into your overall pay. Generally its worth it if you don't mind putting in the time.
Much of middle and upper management is related in some way or part of the same social circle. They spend a lot of time outside of work with each other and inevitably end up working or at least talking and thinking about work all the time. This mentality trickles down into even the production people and makes for an interesting culture. If you are a hard worker but only put in your 50 hours you'll do OK, but will never really get ahead. Make yourself available 24x7 and you may be able to advance. This is not unique to TTM, but it carries more weight here than other places I've worked.
In the last couple of years, long term employees have been treated negatively. Some of them have been shoved into positions they don't want, and in some cases have been demoted or not given raises. I'm not sure if this is an attempt at shaking people up and trying to challenge them or get them out the door. Either way, it has made some already stressed out people even more unhappy. Not everyone wants a challenge or to learn new things - they are still productive employees and do their jobs to the best of their abilities. Recognize that and reward them - don't punish them.
There are a lot of petty rules to follow and more added every quarter. Give the people a little freedom back and they will be happier and more productive. For the most part these people are responsible adults - treat them like it. Reprimand / punish the few that take it too far.
Some of the management, even TOP management, makes fun of other employees behind their backs - ALL the time. You are leaders so start acting like it. Get off the power trips and realize that some of the people you are demeaning are also helping to keep the place going.
Management and sales like to complain about their customers behind their backs too. These people may not know everything there is to know about circuit boards, that's why they hired you. Stop biting the hands that feed and have a little genuine respect for the customer - don't just give them lip service.
The last two items translate into a culture of rampant arrogance that exists at all levels of TTM Stafford. You are not better or smarter than your customers/co-workers/subordinates/boss. You make some pretty amazing product but that does not give you the right to be arrogant about it. Some companies do business with you because they have to, not because they want to and many employees work there because they have to, not because they want to.