Where is the transmission mount located on a 1991 Nissan 240sx?
I know from expirience that the manual trans has two. One is
called the right trans mount, near the motor, and the other is the
rear trans mount located directly under the trans. You can use a
pry bar the lift up on the trans and see if the mount is broken.
the rear mount is about fifty bucks, and is easy to replace, its
mounted with only four or five bolts.