I started my 743 for the first time in 2014 yesterday. I used it to dig up and move a good size bush and haul away a mid sized tree. The red warning light for the transmission on the top of the cab came on and off intermittently. Is this something I should worry about or could it be attributed to cold fluid and the machine sitting for an extended period. I read a few posts and they mentioned low charge pressure or high fluid temp. I haven't changed the hydro fluid in a few years do you think this could be the root cause? Thanks Bill