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Tranny issue? |
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1980snryan 
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Joined: September-03-2017 Location: Angola Status: Offline Points: 31 |
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 Topic: Tranny issue?Posted: September-03-2017 at 2:34pm |
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When going idle speed, the boat seems to lurch forward, slow, lurch forward. Is this an issue with my transmission?
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Duane in Indy
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Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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Posted: September-03-2017 at 4:24pm |
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Sounds more like a carb issue. What is the idle RPM and does it stay steady or surge also. Tranny issue should show itself at above idle RPM also.
Need more info. |
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Keep it as original as YOU want it
1978 Mustang (modified) |
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1980snryan
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Posted: September-03-2017 at 7:44pm |
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I will check on the RPM.. it doesn't do it when I go faster than idle.. it takes a while to warm up before i can put it in nutreal to idle without dying.
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the grinch
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Joined: November-25-2008 Location: Lexington, NC Status: Offline Points: 150 |
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Posted: September-09-2017 at 8:42am |
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Don't be too quick to blame this on a carb or vacuum problem.
RPMs are the only factor that answers this question. My trans has been lurching or surging for 3 years and I have no RPM change. It is all trans related and past due for a rebuild. I've experienced hard slips at ski speeds and WOT. I've also experienced gradual slipping that is not really felt, but seen or observed by top speed falling off. I can do a fluid siphon and fresh refill and get speed back, however, the surge at idle never goes away. |
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It takes a big hole to bury an elephant.
Kirk Miller [URL=http://www.correctcraftfan.com/forum/register.asp?FID=7]KIRKS79/URL] |
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KENO
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Joined: June-06-2004 Location: United States Status: Offline Points: 11197 |
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Posted: September-09-2017 at 12:09pm |
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At the same time, don't be too quick to blame it on the transmission.
Like Duane said, look at the carburetor. You could also make sure your distributor flyweights and springs are functioning correctly as they can cause issues .with idle speed fluctuations Also like Duane said................... .more info 
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gt40KS
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Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 946 |
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Posted: September-09-2017 at 5:10pm |
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Sorry if I missed it (again), but what boat/ engine are we discussing here? By the screen name it appears to be a 1980 SN, but sometimes you never know.
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JCCI
1995 Ski Nautique GT40 |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-19-2017 at 7:20am |
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Ryan,
What did you find with the surge problem? We'd love to hear back so we'd know if we were able to help. |
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8122pbrainard
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Posted: September-22-2017 at 8:39pm |
Have you had a chance to look into the problem yet? |
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1980snryan
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Posted: September-23-2017 at 10:55pm |
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Sorry all, I travel for work and have not had a chance to get out in the boat lately. I plan on going out tomorrow and will post an update.
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1980snryan
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Posted: September-23-2017 at 10:58pm |
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1980 SN with a 351
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1980snryan
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Posted: September-24-2017 at 10:53pm |
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Took the boat out today and the rpm does fluctuate just a slight bit. I'm going to mess with the idle adjustments a little and see what that does.
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8122pbrainard wrote: