Troubleshooting TD Gearbox?

[Mark Sherman <MARKSHERMAN@worldnet.att.net>]

Thanks to all of you who provided me with useful suggestions of where to
look further.

1. Clutch/shifting seems to be ok so I will rule out transmission as
possible source of noise.
2. Engine & gearbox mounts seem ok.
3. Water pump & generator ok.
4. Rocker shaft/mount pads and rockers look ok.
5. Engine stabilizer ok.

Rattle seems to come from bottom of engine, not transmission. Any ideas
on how I can diagnose it without taking apart the engine?

Mark