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Old 09-22-2016, 08:50 AM
Rossthaboss11 Rossthaboss11 is offline
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Boat: Mastercraft, x45, 2005, 6.0 Liter LQ9 Vortec
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Need Help! Horrible sound from transmission area

In the middle of surfing yesterday my 2005 Mastercraft X45 with the Cadillac LQ9 engine started making a horrible noise. I quickly put it in neutral and shut it off and got towed back in. You can hear the noise in the video which sounds like its coming from the tranny area under the middle seat.

Throttle shifts in and out of gear normally when boat is off
Prop spins freely in neutral
Oil level is good and looked clean on the dip stick
Tranny fluid was a little low but that also looked clean on the dip stick
Engine seems to fire up and idle normally
The boat kept driving forward when it happened until i put her in neutral and shut it off
Boat has 940 hrs

What do you guys think it is? I expect the engine and tranny will need to be pulled.
Attached Files
File Type: mov IMG_0227.mov (6.72 MB, 189 views)

Last edited by Rossthaboss11; 09-22-2016 at 11:45 AM.
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  #2  
Old 09-22-2016, 09:25 AM
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mikeg205 mikeg205 is offline
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Boat: 1995 Pro Star 205 5.7 Liter
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yikes - does not sound good, was hoping it was damper plate noise but isn't ... I assume you run heavy ballast to surf even with your x45..
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Old 09-22-2016, 09:34 AM
Rossthaboss11 Rossthaboss11 is offline
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Boat: Mastercraft, x45, 2005, 6.0 Liter LQ9 Vortec
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This is the noise we all dread hearing. Yes i surf frequently with with added sac's and added the surf gate this season
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  #4  
Old 09-22-2016, 09:43 AM
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mikeg205 mikeg205 is offline
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See if you can find an independent Indmar mechanic dealer.. unless you like your local dealer.
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  #5  
Old 09-22-2016, 03:27 PM
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etduc etduc is offline
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You're going to have to pull the tranny. With luck, it's your flex-plate. With 900+ hours, you should go ahead, and inspect/rebuild your tranny. (Friction/steel plate, replacement) It's not, expensive, good insurance.
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Ayyyy!

2004 Red/White/Black something or other.

Formally, 1994 RED Mastercraft 205, Chevy 5.7 TBI.
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  #6  
Old 09-22-2016, 03:39 PM
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Bouyhead Bouyhead is offline
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Sounds like a damper plate to me.
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  #7  
Old 09-23-2016, 09:26 AM
NatesGr8 NatesGr8 is offline
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Join Date: Jul 2004
Boat: 05 X-45
Location: CT
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I'm the Co-owner of this boat. My immediate thought was an oil pump inside the transmission however the sound is heard from all over the engine compartment despite seeming loudest at the transmission. Anyone have any schematics of the ZF 63 IV-1.6 transmission?

Plan going forward is to pull plugs and boroscope to check for obvious cylinder damage. Pull valve covers to make sure rockers haven't come loose. Any other suggestions or ideas? I don't feel the engine is the problem but want to make sure before we pull everything out.

We will most likely do all the work ourselves, how difficult is a transmission rebuild? I've found a supplier locally that will get me a brand new 1 year warranteed for around $3000. What other things should I be replacing while the engines out?

Thanks, Nate
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  #8  
Old 09-26-2016, 01:19 PM
Rossthaboss11 Rossthaboss11 is offline
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@mikeg205 what makes you say its NOT the damper plate?

Any other suggestions guys before it gets pulled?
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  #9  
Old 09-26-2016, 01:35 PM
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Shaun R Shaun R is offline
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Pull the dust shield off the trans and look for metal fragments at the bottom of the bell housing. If you see a spring then you know it's the damper plate.
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Old 09-26-2016, 03:47 PM
Rossthaboss11 Rossthaboss11 is offline
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Hmm alright. Any change you could point out where the dust shield is? Didn't notice this anywhere while looking around
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