While you have the transmission out and flywheel off, you will have access to the tension bolts on the rear housing. These are fairly important, since they hold your engine together.
It is not uncommon to find that these bolts are loose. Torquing them to the proper specification should extend the life of your seals, and possibly stave off the inevitable rebuild.
Don't get crazy here! Overtorquing may lead to warped housings, crushed seals, or other bad stuff. You can definitely do more harm than good. Just make sure they are within specs!
These bolts must be torqued gradually and in the order specified in the diagram below to 24-28 ft-lbs. Just a little at a time, repeat the pattern until the bolts are properly torqued.