I have a 2001 sl2 saturn that has no reverse.Forward gears are ok but seem a little slugish Heeeelp!

most engines have 3 or 4 engine mounts and if one had failed the others will be close behind. Misalignment of the engine to the shifting operation will lock levers or jam cables.

code p 0442 is the code for faults concerning the EVAP system
and will not show up in transmission changing gears
indications from your statement is problems in the TR sensor, VSS or TCM units
check for problem wires and connections
as for the problem of getting to park from reverse , check the adjustment of the park and neutral switch as one may have moved or be loose

You'll need to get the trouble codes to see what is the problem. Many auto parts stores will pull the codes for free - I'd start there.

TYry doing a static power brake test on the vehicle, with the car in gear, wheels are chocked up so not to allow vehicle to move forward, stand firm on the brake pedal and slowly add gas to the engine, does it dance around and miss fire?
If so you may have a bad coil/plugs/wires under load they may be breaking down they should have been replaced by at least 65,000 miles if not do a featured maintenance on the engine and replace them.

Take the car to AutoZone, they will check your ECM for the code using a OBD II scanner that is causing the problem for free, once you have that code the problem can be diagnosed easier.

broken gear in the trans. i hate to tell you but the trans needs to be rebuilt or replaced.

replace tranny filter and fluid, do not do tranny flush, could cause more problem. just filter and fluid change

Saturn says and I quote

there transmission fluid is not to be changed after the first change at 6000 miles.

Now I say it should be changed at every 30000 miles. If changing out the fluid doesn't work then you need to go to a transmission repair shop.

This could be a dirty filter. i would start there and replace fluids with lucas tranny fluid. Does it change when the car warms up i wonder ?

Sounds like an output shaft bearing. In the trans. If it is you should hear it mostly in 3rd and 4th gear. Not a cheap repair, but really needs to be fixed.