Tranny slipping |
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brettmac
Newbie Joined: May-24-2014 Location: westfield ny Status: Offline Points: 38 |
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Posted: July-06-2019 at 10:41am |
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We had the 88 Dominique out on Lake Erie on the 4th. She runs good,but the tranny seemed to slip a few times coming up on plane. Only for a second, then regains pick up. Fluid levels good etc. Advice???
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Brett,
Add a small amount of oil and see if it still slips. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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Getting on plane is the highest load on the transmission so if it's gonna slip, that's when it will happen first especially with a heavy load when it's bow high.
At this point, don't be afraid to overfill it a little to be sure the pump isn't losing suction. An extra 8 ounces or so would be OK. You could change the fluid too if what's in there is really old, ugly looking or burnt smelling, On the other hand, it might be the beginning of the end |
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1796 |
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Ken—do any of those “friction modifier” additives intended for use in limited slip differentials work? I’ve never tried them and know nothing about them. I wonder if there’s any point if the friction material is gone south anyways. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Peter,
My understanding is the additive is for the "slip/grab/chatter" that some limited slip differentials experience. It reduces the friction so it would be the opposite of what's needed in our wet clutch marine Trans's. |
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1796 |
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Yeah after I posted I went back and looked up what those modifiers do. Apparently anything that would increase friction would destroy the pump. Slipping is usually a plain old indicator of the inevitable rebuild.
I had reverse go out on a Velvet Drive. No doubt about that! |
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brettmac
Newbie Joined: May-24-2014 Location: westfield ny Status: Offline Points: 38 |
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Finally able to get on the water, topped up the tranny and was able to do hole shots without incident. Thanks all for the help.
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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Nice cheap and easy fix Hope it stays OK and check for leaks . A few slips don't necessarily mean the transmission is shot, maybe a little less healthy than it was, but if it continues to be good, don't worry about it and keep it full. |
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FFImarine
Senior Member Joined: June-21-2016 Location: Medina Status: Offline Points: 142 |
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I strongly advise against putting any sort of additive in the trans. Transmissions don’t just slip for no reason. It may be working “ok”now but your facing the inevitable rebuild sooner then later just be careful cause you don’t wanna do more damage to it trying to make it work. We rebuild transmissions on a daily basis and frequently see excessive damage due to trying to remedy a slipping trans. We are always here to help you guys out In anyway day or night and if you have any questions please don’t hesitate to call 330-273-8291
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flyweed
Gold Member Joined: July-11-2016 Location: WI Status: Offline Points: 539 |
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FFImarine....so what's it cost to get a Trans rebuilt these days? Mine is just fine, but as with everything, one of these years..It'll most likely need one. My boat is a 93 SN, with the 351HO engine..and the 1:1 trans. My engine has just under 2300 h0urs, and purrs like a kitten, as I keep very good care of her. However, just like the Trans, at some point and time, I'll probably tear down the top end, just to do a top end job as well.
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'93 Ski Nautique NWZ, Air Boom Tower
Drink Tonight..for tomorrow We Ride! |
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FFImarine
Senior Member Joined: June-21-2016 Location: Medina Status: Offline Points: 142 |
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Depends on what you have. PCM 40 series are $1,400, borg warner 1:1 are $900 and borg Warner 1.52:1 and up are $1,000 for a basic rebuild. We also offer upgraded clutch kits for the borg Warner’s for an additional $200 which consist of either borg Warner green clutches or alto red eagle clutches both with Kolene steels . We have had good success holding up to 500hp on a standard 71c with the upgrade. All of our rebuilds come with a 1 year unlimited hour warranty. Anymore questions please give us a call anytime @ 330-273-8291
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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Maybe an explanation of what Kolene steels are would be a good thing right about now |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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So Pete
It looks like you've finally come to accept that the wet clutches in a marine transmission and the wet clutches in an automotive transmission operate basically the same way. It would have been nice of Joe to tell a little about them instead of just throwing the words out there with no description. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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I said they work differently? It must be a miss understanding. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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Now I have to go dig up that old thread.
Be back in a bit with a link |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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I have to admit, I was pretty fast with that link
First post on page 2 says it all link Here are your words
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FFImarine
Senior Member Joined: June-21-2016 Location: Medina Status: Offline Points: 142 |
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Alto red eagle friction plate lining has a unique dual saturation which imparts high frictional properties and high heat resistance.. kolene steel plates is a salt bath nitriding process. In generic terms, it is a thermochemical diffusion process, whereby ferrous parts are processed in molten salt with a specific nitrogen potential. In plain English, it provides a surface treatment that enhances wear and fatigue resistance from 200% to 500% which offers higher heat resistant and increased lubricity.
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10604 |
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Either you use lots of big words or this was a cut and paste from Alto or Raybestos
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FFImarine
Senior Member Joined: June-21-2016 Location: Medina Status: Offline Points: 142 |
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Those are direct quotes from the alto website. All I know is red friction plates and kolene steel plates = more holding power |
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