The primary cause of a transmission to experience hard shifting is low fluid. Fluid is the life of a transmission and operates most of its functions.
A bad transmission gear can cause your 1999 Nissan frontier to shift hard. Low transmission fluid can also cause the transmission to shift hard.
Possibly low fluid.
Has recent work been performed?
Have the transmission checked for codes. That will tell you the possible causes.
A hard shift from first gear to second gear in the Honda Accord could be because of a linkage problem with the transmission. It could also be a problem with the transmission screen needing to be cleaned or low transmission fluid.
check fluid in tranie....and LUCAS tranie lube
electronic solenoid
The transmission may shift hard due to it beginning to fail. However, it may also be due to low transmission fluid.
The most common reason for an automobile transmission to shift hard is low transmission fluid. Make sure the transmission fluid is at the appropriate level.
modulator valve on the transmission.
Check the transmission fluid on the 1995 Nissan Altima. Bad fluid can cause the transmission to shift harder on parts that are more worn.
More likely it has something to do with pressure problems in your transmission, check the fluid and replace the transmission filter. If the problem is not fixed check the vaccum lines running to the transmission and the vaccum off the engine.