[TR] Sealing methods for TR2 and TR3 transmission covers/ doghouse

[Randall]

> Appealing to the collective wisdom of the list -- what is the best way
> to seal the tunnell when I replace it?

I use ordinary "adhesive caulk" from Home Depot.  Easy to apply, seals very
well (no oil through the seams) and cleans up easily next time I remove the
tunnel.

Drawbacks are that it's a bit messy to apply, and it can be a little hard to
get the tunnel out next time.

-- Randall