I just got my "48" cab back from the body shop and putting it all together. I installed a rubber gasket on the front top cowl vent and it works perfect, closes flush. The drivers side no so much. This gasket came in foam. I glued it to the cab and installed the vent. If I hold the inside handle closed the vent still is not quite flush. The gasket wants to push it out. If I push on the vent from the outide it will close but will not stay closed, foam pushes it open. There also does not seem to be any way to hold that vent closed. The handle has no catch to keet it in place. What could I have wrong.

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