So my dad's a bit of an idiot (more so than me) and got himself a 2007 Montana SV6 and of course it's got transmission problems already. Sometimes but not always, when he stops at a stop sign for example then moves again, the transmission exhibits a rather objectionable clunk. I drove it for a few minutes and it happened to me one time as well. Upshifts don't feel harsh but when I was driving it I thought I noticed what felt like a little slip or flare when it was shifting between gears. Only did that once. Is this the pressure control solenoid going bad? Are these replaceable in a yard without a lift, or would it need a garage to handle the job? I watched a video and the dude had to drop the engine cradle a bit to get at the side pan.