i have the same winch. no problems for me yet, but i dont ride in mud so i dont get in to extended/really hard winching.
the 45 draws basically the same amount of amps at the same loads as the 55. the 55 just is capable of higher loads (and amps) when it needs it.
i posted a comparison before with the 45 vs 55 axon performance in this thread:
Hello Everybody, I'm curious about everyone choice of winch and why. What where the driving factors of your decision. price, reputation, ease of use. Or you think a winch is a waste of money. My self. I have a KFI products SE45-R2 (4500lb).
hondasxs.com
here is the graphs from that post:
I plotted both sets of performance specs on the same graph. (its really nice that they give this much info)
and here is the data side by side