Trans Maintenance.
If you do go the Royal Purple route, you might want to think about staying away from their Max ATF fluid. Results from both people I've found using it were not positive.
However, results from people using their Synchromax fluid have been positive.
You may want to read through these threads to gain some perspective, especially since you have a 98-00 T-56:
Can I run a synthetic fluid in my T-56? Maybe. Look inside.
m6 tranny fluid?
LS1.com: Ending the speculation: Blocker rings, who's had them fail?
LS1Tech.com: Ending the speculation: Blocker rings, who's had them fail?
Hope these help!

Chuck

