When driving shifter doesn’t shift into 2nd or 3rd. This is occasional. (quite often but not always) Could my fluid be low? Is there a way to check fluid level if this is the problem? Could it be a linkage issue?
If the fluid is low, yes it may help. But this is a sealed system so generally when the fluid level is low it means the clutch needs replaced. If the fluid level is not low, it can mean the clutch master/slave cylinder needs to be replaced. If you can change gears when the engine is off, the transmission itself is fine.