You do not mention what year Explorer you have, however, my '98 Ford TSP
Workshop Manual CD indicates "to remove the instrument cluster lens and
mask assembly simply remove the screws (seven total, three on top and
four on the bottom)". So it appears as though you can just replace the
lens without replacing the entire cluster.
Just a thought, but maybe a few of the screws were overtightened, which
may have contributed to the cracking?
Good luck,
Steven
> Looked today at my gauge cluster and found that it is starting to get two
> cracks in the plastic over the top of all the gauges. Wow, I can't think
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>
> Paul