noisy and slow drum speed

1. disconnect power,gas and vent lines
2. pop off top of unit
3. remove front of dryer
4. lay unit on its back
5. remove drum and replace pulley assembly,belt,drum rollers of which it has 2 rear and 2 front
6. reverse above and then remove filter-vent housing and scrape off old seal install new seal
7. re-connect power,gas and vent use again
8. only sad part to whole job was seeing how cheaply whirlpool now makes thier products