in FB area try usman saheb., he is closed on Fridays & works between 10 am to 8 pm 6 days a week.0300 8272720
Is the breather vent open on the tc?
I will check. Item #6 is 29515-80050, PLUG,T/F BREATHER
Apparently the plug is a one-way valve. $3.99 and common with the Samurai. So is each of the stake nuts for the driveshafts.
This is a mechanical one way valve, usually doesnt go bad, just clogs with dirt then blows seals.