a bad engine and transmission mount 1 in the rear near the fire wall or 1 in front near the radiator.
If no forward or slipping forward suspect problem in the forward clutch and circuit. Reverse does not use the same applied components
the clutch or clutches in the transmission are bad,even if changing the tranny filter helps the forward gears will not be right and quit again
You have not pressed the Clutch peddle to change the gears!!
check your clutch slave cylinder for leaks,its bolted on your transmission,about 20 bucks
the forward gear clutch pack is worn out. the only solution is to get the transmission rebult.
Probably do to a bad pressure plate and or clutch plate. I would first check linkage adjustment and slave cylinder before changing clutch.
There is a switch mounted under the dash above the clutch arm. It has either slipped out of its bracket or is bad. It is there to keep you from starting the car with the clutch engaged. A safety factor.
there is a safety switch on the clutch, it should be on the inside of the car that the pedal has to activate so the car will start, apparently that switch is bad.
Not with the clutch by itself.
transmission is leaking ,u may have acrack in it.
The chances are, the only clutch left in ur transmission grabbing is the revere clutch. Sounds like new clutches to me, good luck.
If you have an automatic transmission, it probably has a forward clutch/band problem.