It is very likely. On November 1, 2007, the Sentencing Commission amended the guidelines by providing a two-level reduction in most crack cocaine cases. By making this amendment retroactive, the Sentencing Commission invited federal inmates convicted of trafficking crack cocaine to re-open their sentences
for purposes of modification and reduction. While the guidelines limit the reduction to two-levels, Supreme Court
precedent suggests that, once the sentence is re-opened, federal court judges retain full discretion to sentence anywhere within the statutory range set by Congress. In some circumstances, this can give federal inmates an opportunity for immediate release, and in your case may be able to cut down your time that you are formally placed on probation.
I do suggest you contact a criminal
law attorney in your area who can help you re-open the case and see what type of a modification you can be eligible for.
Good luck and I hope you are able to get your sentence lowered.
Dimitry Alexander Kaplun, Esq.