  In light of the recent measurements of the top quark forward-backward
asymmetry at the Fermilab Tevatron experiment, which in some regions of the
parameter space shows a discrepancy of 3$\sigma$ compared to the SM prediction,
we analyze top quark pair production and asymmetry in the context of left-right
models both at the Tevatron and LHC. We use the minimal manifest left-right
model and an asymmetric left-right model where gauge couplings and flavor
mixing in the right-handed sector are allowed to differ from those in the
left-handed sector. We explore the consequences of including effects from $W_R$
and $Z_R$ gauge bosons, consistent with phenomenological constraints from meson
mixing and new bounds from ATLAS and CMS, for the $t \bar{t}$ cross section,
invariant mass distribution and forward-backward asymmetry at the Tevatron, and
predict their values at the LHC. We show that, choosing parameter benchmarks
for the model while preserving agreement with collider, electroweak precision,
and flavor violation data, the generic left-right model cannot account for the
large deviations of the observed asymmetry at the Tevatron and also that it
predicts very small charge asymmetries at the LHC.
