ok , I have a Attex 500 superchief, it runs and works great. I take it out now n then but last time I noticed tranny fluid coming out of the top seals where the forward n revers levers are. I started looking for a vent cap or some way for it to vent pressure that might build up when it gets hot. It doesn't have one anywhere that I can find. Do these have a vent anywhere? Thanks