in my 1994 voyager with 3 liter engine and automatic transmission without overdrive, ive noticed when i change to reverse, it shudders. the van moves, but shakes. it also does the same in forward gear, but not as much.\n\ni am no mechanic or technician, but the oil is changed regularly and the shop that does it normally checks and adds transmission fluid. so it cant be a fluid issue. and theres been no repairs along the frame where engine installation points are. so, theres nothing loose there.\n\nwhat could be causing this? is this a transmission issue? is it clutch related? whats happening?