How far off the ground is the TC? Anywhere near the height of a low-profile trailer (rental) that you could back under it?
Or can you make a sturdy enough plywood platform with jacks, to stabilize the TC at its current height, while you take off the jacks and check them out?
A mobile RV tech could be very helpful. You might call around to find out where one might be available.
Do you currently have GSRA? If so, might ask if they will cover the cost of the tech you find since they can't find one for you.
Just some thoughts. Best of luck to you.