Trans Fluid
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=18134
Printed Date: November-18-2024 at 4:48pm
Topic: Trans Fluid
Posted By: jlstodd1
Subject: Trans Fluid
Date Posted: June-21-2010 at 10:16pm
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Hi Folks,
Does anyone know if it is alright to use Dexron VI in a 1979 71C trans? The manual indicates Dexron II or III. The VI is Full Synthetic. Thanks, John |
Replies:
Posted By: 8122pbrainard
Date Posted: June-21-2010 at 10:29pm
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John,
Why? Stick with the regular Dexron/Mercon and don't be "thinking with your dipstick"  A marine trans has very little in common with a automotive automatic. It's simply a hydraulic pump that applies pressure to wet clutches. You put a synthetic with friction modifiers in it and you'll be sending your trans off to Eric for a rebuild. Of course he is a little on the slow side so put the synthetic in there!! 
Seriously, why are you considering it???? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: jlstodd1
Date Posted: June-22-2010 at 12:17am
| The Kragen auto store I went to did not carry the II or III and everybody is always touting the benifits of synthetic, so I was just wondering. I'll try another store. |
Posted By: weitekampt
Date Posted: June-28-2010 at 1:59pm
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Pete,
So you are saying that with the friction modifier you will just slip the clutches? I have several quarts of Amsoil TorqueDrive in the basement from my last trans service on my SuperDuty truck that I was considering using in the boat. I don't know if there is a friction modifier in that fluid or not. I know in some of they put some in their gear lube, but unsure of ATF. I would like to hear some real experiences from people with trans failures due to full synthetic ATF. I will gladly buy 2 quarts of the cheap dino ATF, but if this expensive stuff will work in the boat, why not. Sure has done wonders in my 4R100 transmission that is genuine FORD JUNK!! Just throwing out the question why I shouldn't put it in there. ------------- 1993 SkiNautique ProTec 2009 Boatmate trailer. 1240 hours on meter. http://www.correctcraftfan.com/diaries/details.asp?ID=1559&sort=&pagenum=2&yrstart=1991&yrend=1995 - 1993 Ski Nautique |
Posted By: TRBenj
Date Posted: June-28-2010 at 2:27pm
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Because PCM says not to. Synthetic is too "slippery" for wet clutch transmissions according to their techs, they started seeing premature failures.
Stay away from any additives! Just keep on using conventional Dex/Merc or DexIII and change it every year. ------------- |
Posted By: 8122pbrainard
Date Posted: June-28-2010 at 2:58pm
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Going back to a earlier statement, you need to understand that the marine trans has very little in common with the automatic car/truck trans. Fancy ATF is made for them and not the marine trans with wet clutches. There isn't a wet clutch in a automatic trans and it's got a torque converter!
Another example of wet clutch problems with fancy oils is with the older marine manual trans which shared engine oil. I was over at a friends the other day who rebuilds old marines with manual trans's. This spring he had two come in from clients who were "thinking with their dipsticks" and believing the TV commercials. Both had put synthetics in their engines and the wet clutches slipped to the point of warpage. The friction modifiers in these oils did the damage. New clutch plates and back to a high ZDDP oil. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: horkn
Date Posted: June-28-2010 at 3:56pm
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Fwiw, there are wet clutches in most motorcycles. Running synthetic in almost all of these wet clutch bikes won't present an issue. The issue is more related to the kind of materials and the construction of the transmission, rather than the clutch simply being wet.
------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: 79nautique
Date Posted: June-28-2010 at 4:07pm
more unrelated BS as always.  ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
horkn wrote:Posted By: horkn
Date Posted: June-28-2010 at 4:10pm
Just for you then...
Pete, there are automatic automotive trannies that have no torque converter, AND wet clutch plates. Porsche and Mercedes have these. http://en.wikipedia.org/wiki/Dual_clutch_transmission Also, Ford has both dry AND wet clutch trannies with no tq converters.... http://media.ford.com/article_display.cfm?article_id=29738 Automotive technology nevergets used in boats. right? ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: 8122pbrainard
Date Posted: June-28-2010 at 4:17pm
Really? That's not what a very close friend of mine that happened to be my best man says. He happens to be half owner of Schamburg Honda Suzuki and a certified mechanic for both. We've talked about it often!!! ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: 8122pbrainard
Date Posted: June-28-2010 at 4:20pm
Well Tom you do have a tendency to get real picky especially on Fords!!! Now, do you what to confuse the situation or just help others who may have or thinking about using a synthetic in a marine application? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: horkn
Date Posted: June-28-2010 at 4:28pm
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See, now THAT is not even close to the truth.
------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: 8122pbrainard
Date Posted: June-28-2010 at 4:35pm
Which statement? Marine trans's not similar to automotives, my stating you're potentially confusing some or the synthetics in motorcycle wet clutches? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: 79nautique
Date Posted: June-28-2010 at 5:54pm
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Tom how is this solving the OP issue talking about the latest ford tranmission copy of someone else's invention?
IT's not, damn idiot, The same way if I was to talk about the CV transmision using gears and no clutch or pulleys, that we designed and used in a hybrid bus application as nothing to do with fixing this members issue. Yea it's a f n transmisson and that's all they have in common. So why do you constantly have to waist time posting damn dumb ass information that is unrelated to the issue of the thread. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: horkn
Date Posted: June-28-2010 at 5:58pm
The motorcycle wet clutch mis information. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: 8122pbrainard
Date Posted: June-28-2010 at 6:10pm
Tom, I think I'll stick with what a certified bike mechanic has to say and certainly not your opinion. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: phospher
Date Posted: June-29-2010 at 3:50am
I know the Halls who own Schaumburg Audi :) |
Posted By: lewy2001
Date Posted: June-29-2010 at 8:21am
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Friction modifiers in motorbike wet clutch's is a definite NO.
Most of the new low friction synthetic oils will cause problems. ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
Posted By: eric lavine
Date Posted: June-29-2010 at 10:27am
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Dexron/Mercon or equivalant, it will clearly say on the bottle....dont re-invent the wheel. actually the old type F, had friction enhancers in it, it was to hold the clutches for less slip, the biggest killer in any trans is slip, it creates heat ------------- "the things you own will start to own you" |
Posted By: 75 Tique
Date Posted: June-29-2010 at 11:26am
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Normally, not being a techy type, I would stay way out of this, but I did have to chuckle at using a Wikipedia reference as back up. Teachers forbid students from using Wikipedia for any research at all because there is so much garbage on it. Wiki is populated by any knothead who happpens to decide he wants to write about something, no references, no peer review, no nothing. Stay away from it. ------------- _____________ “So, how was your weekend?” “Well, let me see…sun burn, stiff neck, screwed up back, assorted aches and pains….yup, my weekend was great, thanks for asking.” |
Posted By: jlstodd1
Date Posted: June-29-2010 at 2:04pm
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Hey Folks,
Sorry about setting off a fire storm. Figured it was just a simple question! I completed my trans rebuild and used Dexron 11. lol John |
Posted By: phospher
Date Posted: June-30-2010 at 1:51pm
Interesting topic as I've wondered about this as well. Actually, that article seems well written with a bunch of sources and references as are MOST wikipedia articles. Don't get me wrong, wikipedia is not perfect but it's by far the best information source on the net. Just check the sources. There was actually a study a few years back that found Wikipedia is about as accurate as Britannica. |
Posted By: weitekampt
Date Posted: July-02-2010 at 3:06pm
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Hell, I learned a lot too! Amsoil still in the jug! Thanks guys. ------------- 1993 SkiNautique ProTec 2009 Boatmate trailer. 1240 hours on meter. http://www.correctcraftfan.com/diaries/details.asp?ID=1559&sort=&pagenum=2&yrstart=1991&yrend=1995 - 1993 Ski Nautique |
Posted By: horkn
Date Posted: July-02-2010 at 3:50pm
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fwiw, I never mentioned anything about the friction modifiers in wet motorcycle clutches. We were talking about synthetics in bike wet clutches. I simply mentioned that synthetic and wet clutches in bikes are quite common with no issues- provided you use the proper synthetic.
Obviously running an oil with the "energy conserving" label on it is a big no no. A bike specific wet clutch synthetic is the way to go. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |