89 nautique 351 and pcm 40

Matt,
From your description, it sounds like you're going to have to open up the trans to find out exactly what happened. The input seal pushing out is typical of a worn pump. How many hours are on the trans? You mention the fluid level was correct but was the color good and did it small burnt at all?

Welcome to CCfan.

Wenzingerm wrote: I just bout this ski nautique and I took it out to the river yesterday to test it out. Ran well for about 40 minutes and then I noticed the seal on the input shaft started to push out alittle bit.

How'd you notice this since you can't see it?

Do you mean that you started seeing fluid leakage from the bottom of the bell housing?

You say you lost forward only and reverse works, so your pump is functioning if that's the case

Is the shaft slowly spinning in neutral, like slow enough you could stop the spinning with a 2X4 against the shaft or is it moving at the same speed as the engine.

8122pbrainard wrote: Matt, From your description, it sounds like you're going to have to open up the trans to find out exactly what happened. The input seal pushing out is typical of a worn pump. How many hours are on the trans? You mention the fluid level was correct but was the color good and did it small burnt at all? Welcome to CCfan.

I got paperwork from the previous owner showing a trans rebuild in May of 2016 so I would not think to many hours are on the rebuilt trans. Boat and motor are right at 600. Rebuilt at Fantastic Finishes in Medina Ohio. Have heard pretty good things about them. Trans fluid seemed a good color and didn�t smell burnt at all. How do you tell if the pump is good or not? Seemed to circulate oil through the trans cooler well.

Did you have slipping or any loud groaning noises as forward was going away?

I rebuilt my 71 series myself.   Pretty good understanding how it works.   Simply a high pressure oil pump and the valve directs pressurized fluid to the large reverse piston or the forward one.   If the pump is warn I suspect it would result in lower pressure.   Not clear how it would work in reverse and not in forward.   Also not clear how the rear seal on the transmission would be pushing out as a result of lower oil pressure unless it is not getting lubricated and burning out but suspect it would show signs of this.   

Yes it believe it has to come off but first I would contact the guy who built is and ask him.   Also is there any type of warranty?   suspect it would have been 90 days or up to a year so likely it is out but doesn't hurt to ask.     Reputable guy may not charge if it was defective if you bring it to him out of the boat.   

KENO wrote: Probably a good plan as far as pulling it. Shierh may have rebuilt his Borg Warner but that not spelled PCM. They're a little different animal. Like he said, I'd get in touch with Fantastic Finishes

I�m just about to work on pulling the trans out. I�ll forsure get in touch with the place that rebuilt it. I haven�t heard to many good things about the pcm trans. What other models of transmissions would work on a 89 351? This is a right hand engine correct?

Wenzingerm wrote: I haven�t heard to many good things about the pcm trans. What other models of transmissions would work on a 89 351? This is a right hand engine correct?

Supposed to be a standard left rotation engine,the trans changes the direction to a right hand prop. I don't think they are any worse than any other trans,parts are just more expensive. The 40 has been updated to the 80A.Skidim has them for 2,212 for the whole new kit- link4th one down. they do offer a discount too.

I will have to let others who know that year boat answer. I thought they all got the 1.23 to 1 by then,but maybe yours is the decontented model The 1.23 has the output shaft at a 9 degree down angle so that the engine sits level in the boat and it uses a left hand rotation engine and turns the propshaft right. If yours is a 1:1, the prop spins the same direction as the engine- usually a righty in Correct Crafts

I’m not sure then the trans that is in it says 1:1

Does anyone know how to do an air test to check the clutches on the pcm 40?

I forgot to ask, have you been able to confirm the trans ratio? Do you know if the boat has ever been re powered?

8122pbrainard wrote: I forgot to ask, have you been able to confirm the trans ratio? Do you know if the boat has ever been re powered?

Yes the ratio is 1:1 I guess it isn’t original. And I did pull the trans today and take it all apart. Clutches and everything seem to be in really well shape.

Matt,
Now that you confirmed the ratio, I'm curious as to the engine/prop rotation.

[QUOTE=8122pbrainard] Matt,
Now that you confirmed the ratio, I'm curious as to the engine/prop rotation. [/QUOTE
] Thank you for trying to help me figure out my problem. I have a Ford 351 with the pcm 40 trans ratio 1:1. The first problem I had when I first ran the boat was the output seal was pushing out. What would cause this? Tore it apart and put a new seal in it and it did the same thing. After messing with that and running it out of the water. We decided to take it to the river just to make sure everything was working. Ran really well for about 45 minutes and then all of the sudden we were unable to shift into forward. Reverse still worked. I ended up pulling the trans Friday night and spilt it apart Saturday and didn’t find anything wrong with it at all looked to be pretty much brand new. Fantastic finishes in Ohio rebuilt it two years ago and I do not believe it had many hours since that. I am thinking that a piece of the gasket maker got somewhere in the trans and pulled it up not allowing oil to get on the other side of the clutches to put it into forward. That’s the only thing I could think of. A transmission guy is going to look through it tomorrow and double check everything. Any thoughts? Thank you

Wenzingerm wrote: 8122pbrainard wrote: Matt, Now that you confirmed the ratio, I'm curious as to the engine/prop rotation. The motor runs clockwise rotation.

If you're looking at the front of the engine, then it's a standard LH rotation. As Gary asked, a picture of the prop would be great. And as Ken mentioned, a picture of the trans would be great too.