My 94 C-4 top pops out of the 2 retaining pin holes at the rear side of the top when I go over a railroad track or pothole. The front bolts stay in just fine but is there anything I can do to keep the rear of the top in the car rather than in it? The car has never been in an accident it just flexes enough to allow the top to popout of the retaining rods?

Have you tried bolting your top on level ground? That seems to help some.

The rear bolts in, it does not use pins.