1st to 2nd gear shakes

[DailySX]

As the title states, sometimes when I shift from 1st to 2nd gear at low rpm (below 3k), the car/tranny(?) shakes momentarily. Does not happen 2nd to 3rd and so forth. Has anybody encountered this issue?

Driving: 1st gear > (2.5-3k) > Clutch in - shaking occurs for a second > 2nd gear > Clutch in > 3rd > etc. (everything's good at this point).

The car is completely stock by the way, just a daily.

[jedi03]

What shakes? Might check motor an tranny mount also drive shafts carrier bearing...also look at all bolts an make sure none have come loose

[DailySX]

That's what I'm not sure about; I want to say it's the transmission because of the sequence of events.

Thanks for the suggestion, I'll be sure to check those points and go from there. Seeing as this car came from Chicago, I'm afraid of rust damage I'll be encountering.. :/