518 46rh help please

I have never used the Teflons,cuz they look like trouble to me. The kits comes with both so I got a box full of unused Teflons around here somewhere.
If you have zero line pressure at the Reverse port, you got big problems. This circuit is unregulated and should read max pump pressure. So check your L/R piston hasn't blown up, then I have never seen the front pump catastrophically fail, so Ima thinking the TC hub drive broke off, or like you are thinking about the seal-rings, or the front gasket. In any case, the only two checks you can do with thrans up there, are the reverse hydraulic pressure test, and air test. And since you have already seen some pressure test failures, I hate to agree with you, but I don't see any way around dropping it.
If anybody out there disagrees, now's the time to respond