Does it shift out of Park?
If not check stop light fuse - shift interlock and stop lights are a common circuit If it does shift out of Park then shift linkage may need adjustment Try turning key to first position (Unlock) without engine running and the shift to neutral to start vehicle and then shift to Drive
Sounds like it could be your shift linkage that hooks up the the transmission.
One of the reasons a transmission might not shift into overdrive could be a problem with the belt drive inside the transmission. Belt drives can be stretched over time. Another reason could be that the transmission fluid is low or very old or the filter is clogged.
Could be a universal joint. If front wheel drive, it could be the constant velocity joint. I am assuming you have an automatic transmission. If it is a standard transmission, it could be the throwout bearing.
If there is a loud noise when shifting from park into drive, it may be a transmission problem. One should shift slowly, as the transmission could disengage itself.
The transmission is controled by the computer. If it will not shift, there is a problem. There is no (vacuum) modulator. Take the car to a dealer or a good transmission shop. Be prepared to have it rebuilt or replaced.
A plugged transmission filter can cause your transmission to hesitate when you shift into drive. A collapsed vacuum hose can also cause the problem.
Does the transmission engage when you shift it into drive?
the transmission will shift to higher gear
your transmission could be shot. if it will not shift at all, then you will need a new one.
This problem could be the linkage in the transmission. The transmission could also be going out and would need replaced.
Yes, well I can do it on my car
Could be a number of things, check your your transmission fluid, if the level is fine, it may be your transmission or clutch. Most likely your clutch, which is cheaper than a transmission.