This
is a great question, but we must examine what "acting funny" means when
referring to one's drivetrain before recommending a course of action.
Do any of the following seem familiar to you?
Slipping
When
an automatic transmission seems to slip in and out of gear, or the
engine revs up but the vehicle goes much slower than the engine seems to
be running, it's known as slipping. Sometimes the gears reengage
harshly.
Shuddering
This
is where the whole vehicle shudders and shakes while driving, as if
it's having a convulsion. It feels like you're driving over rumble
strips even if you're on a smooth highway.
Neutral Drop-Out
A condition that feels similar to slipping, neutral drop-out is where
the transmission drops into Neutral when the vehicle comes to a stop or
while driving, typically at slower speeds. Sometimes when driving, the
trans drops out of gear resulting in the engine racing up, and then
either sliding — or banging — back into gear, or you step on the gas and
the engine revs but the vehicle goes nowhere as if it's in Neutral.
