Should the gearbox be sitting on the little lump of rubber on the n/s TCA mount? its clearly a bump stop and I bet tehre should be some clearance, but how much. Just noticed it when I went under to try to find a soggy engine mount - I have been getting a lot of rumbling, akin to dead engine stabilier bushes, but I did them last month.

Thought it was gearbox bearings or wheel or d/shaft brgs. but they semm oK - could be part due to a blown exhaust (280k - Volvo original :>))
but I wonder if the end of the g/box is just sitting on the chassis via this little piece of rubber.

Can anyone tell me how high it should be off the rubber?

If the desc is unclear I will get a pic to keep everyone happy.
Cheers
Woz