Here's a weird question, there were several dipsticks for the BW trans. Are you sure you have the right one and the fluid level is set properly?

Also, double check that you are getting full foward and reverse, the control cables may be adjusted improperly. I've seen that before.

Got with Huber and asked question about leval a couple weeks ago when I did the last rebuild, he said 2 qt. after rebuild and test runs ended up with 2.5 qts and as far as the linkage goes it is adjusted correctly, These are 10-17s do I need to go to a 10-18?

The 10-18's would be better but,,,, I had stock 10-17's in my old boat for about 4 years. One would slip when I ran WOT.

I upgraded to BAM 10-17 transmissions and they were rated to something like 550 hp which is right where I was at. I never had any slippage problems once I got the trans upgraded with the additional forward clutches.

Switching to the 10-18's kinda sucks cause you have to move the engine forward and it would involve more work than it's worth in my opinion.

How many plates are you running? That trans should handle more than 600 HP with 7 plates. Do you have the late style plastic baffle?

mark , how do you feel about plugging the small vent out and adding a longer piece of tubing with a k/n filter to the fluid fill to get better venting????

Unless your trans is spitting fluid out the vent it is not needed. We figured out why they spit and we do correct it on the units we modify.

nah , no spitting just asking for your opinion . just wondering if that helped the trans breath a little better that's all...

I'm not familiar with your setup, but my Huber 1330's vent to plastic expansion bottles mounted high on the transom. Never saw any puddles in the bottles after I shut down to suggest something puked out there. That vent hose has popped off the bottle a couple of times. Again, nothing in the bildge. For what it's worth...