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Some guys never learn.
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Discussion Starter · #1 ·
My boat has a T400 with a flex plate instead of torque converter. Since I've owned the boat I never thought much of just pulling out the dipstick at the time as I change the engine oil. I know you normally check ATF with the motor running and the tranny warm and it's in park. Park is locked out on my boat. What's the correct way to check my tranny fluid.
 

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Next time you put it in the water idle out through the channel and run it through all the gears. You may want to lightly put a load on it. Run it on plane for a minute then stop,shut it off and check it. Without park that is the best reccom. I can make. I would also suggest putting the parking pawl back in order so you have park. Having Park is nice cause you can run the boat on the trailer without the propshaft spinning as it will still spin slowly in Neutral as there is no resistance like there is in a car with wheels on the ground. I run my Schiada on the trailer in PARK and it locks the propshaft out and SAVES THE STRUT BUSHINGS!!!!
 

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What he likely means is he has a drive plate and spline drive setup. (I am guessing). You have to have a drive mechanism to replace the torque converter. There are several types. My preference is the spline drive and HD drive plate because the drive plates have springs that cushion the 2-3 shift and prolong trans life (input shafts in particular). The solid couplers don't offer this benefit. Of course we're talking about boats with a lot of power here, most any popular coupler style will work well under 1000 hp.

As far as checking oil if the trans has a standard dipstick (some have a pipe plug in place of the dipstick in boats), the oil level should be at the top of the case where the dipstick slides in (dipstick receptical). If you have the pipe plug replacing the dipstick it should be right there when you pull the plug out (up to the bottom of the plug).
 

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My boat has an Art Carr Turbo 400 that has been fit with a spline drive in place of the TQ converter. The trans was also fit with a reverse pattern so all the forward gears 1st, 2nd, 3rd are clicked towards the dash. Reverse and park are all the way back.
 

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Some guys never learn.
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626 Posts
Discussion Starter · #6 ·
What he likely means is he has a drive plate and spline drive setup. (I am guessing). You have to have a drive mechanism to replace the torque converter. There are several types. My preference is the spline drive and HD drive plate because the drive plates have springs that cushion the 2-3 shift and prolong trans life (input shafts in particular). The solid couplers don't offer this benefit. Of course we're talking about boats with a lot of power here, most any popular coupler style will work well under 1000 hp.

As far as checking oil if the trans has a standard dipstick (some have a pipe plug in place of the dipstick in boats), the oil level should be at the top of the case where the dipstick slides in (dipstick receptical). If you have the pipe plug replacing the dipstick it should be right there when you pull the plug out (up to the bottom of the plug).
Yup I used the wrong term. It is a spline drive. I do have a standard dipstick. So with the spline drive can I check with the motor off?
 

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I would think warmed up, idling in neutral in calm water would give a fairly accurate indication of the fluid level.
 

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I was told that since you don't have a converter the fluid levels don't change that much. You can check it with the engine off. Thats how I check the transmission in my cruiser. I keep the level between the marks and everything works fine
 
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