The detent cable adjustment.
500-700
your reverse band for the transmission is messed up, about your only option is to replace the transmission, should cost around 400 used in good shape
r134a
A 1995 Cutlass Supreme should use R12 freon. The fittings are different between R12 and R134 so that they can not be accidentally swapped.
It should be under the hood of the car.
check thermostat and temp sending units there should be two
the idle should be about 900 RPM in park or neutral.
I have 90 cutlass supreme. look under center of car for gas tank. should be on back end of the tank. need to jack up high enough to get at.
It should Be located on the top of the transmission.
it should be a 15 mm bolt. that's what it is on my 91 cutlass supreme and my 93 beretta.
between 17 to 19 MPG.
The 305 was an option on that car, so a 350 should be a bolt-in.