  Lepton flavor universality can be tested in the semileptonic decays
$\Lambda_b\to \Lambda_c^{(\ast)}$ where $\Lambda_c^{(\ast)}$ denotes either the
ground state $\Lambda_c(2286)$ (with $J^P=1/2^+$) or its orbital excitations
$\Lambda_c(2595)$ (with $J^P=1/2^-$) and $\Lambda_c(2625)$ (with $J^P=3/2^-$).
We calculate the differential decay rates as well as the branching fractions of
these decays for both tauonic and muonic modes with form factors obtained from
a covariant confined quark model previously developed by us. We present results
for the rate ratios of the tauonic and muonic modes which provide important
tests of lepton flavor universality in forthcoming experiments.
