Here is your problem.
You need midmounts. It took 8 years to break your your bellhousing, some last longer than others.
The midmounts are closer to the center of the weight of the block, which takes the stress off the bellhousing.
It's been a well known problem for many years. The frontmount motormount was designed to use a transmission that was mounted at the bellhousing. All of the stock applications that used the front mount were set up like that.
I have thought about making some reinforcement bars that went from the block to the trans for those who don't want to use the right mounts, but never had the opportunity.