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Merc Trans What do you think?

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Old 11-18-2007, 05:47 PM
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I have 3-blade Mirages on mine, and the Merc trannies fried on the second trip out. I have NO confidence in them.
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Old 11-18-2007, 07:32 PM
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Who did the rebuild? Did you add the extra clutch disk?>
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Old 11-18-2007, 09:59 PM
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Originally Posted by GoFastSonic View Post
Any one using these still? Are they worth having rebuilt? Will they hold up to 450 HP Small Blocks?
absolutely...
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Old 11-18-2007, 10:22 PM
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Ok what do you have? Rebuilt ever? HP?
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Old 11-18-2007, 10:30 PM
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I had TNT rebuild it with the pump mod's and extra clutches, it shifts and works like a dream... my engine is about 425 hp and it's a 454, we have several friends making almost, and up to 700 hp, and they have had excellent success with them, I wouldn't trade mine for anything.. I wouldn't hesitate to get it built right and use it for your application
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Old 11-18-2007, 10:31 PM
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I have them on my Formula and also my Donzi 18. The Donzi has a big block 330hp and no issues. The Formula I ran for three years with out any issues. I have run long WOT runs and it seems to be ok. Just watch the temps. I run B&M Trick shift in mine.
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Old 11-19-2007, 05:33 PM
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Thanks to both of you for the info
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Old 11-19-2007, 05:50 PM
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WOW! Glad to see such positive comments on the Merc trans. Most people seem to dog them. I have them in my 33 Cig behind a set of 420HP's and (knock on wood) have not had any issues during my ownership (2 1/2 yrs). From what I hear the parts are readily available and fairly easy to rebuild. Sounds like the extra clutch pack is the way to go.

Keep the testimonials on these coming.
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Old 11-19-2007, 07:42 PM
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had them in my 28ss that i sold this summer, owned the boat for nine years not one problem. keep the fluid cool,oil changed, put a pressure gauge on them to keep an eye on them, if the pressure starts to drop repair them before u f__k them up, an last but not least throttling the motors when u are lauching it. also i have one trans complete and one disassembled for sale and parts for those transmission.
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Old 11-19-2007, 08:38 PM
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Seems like allot of people have some good things to say. I just dont want to put out 3600.00 and not have them last at least one season. Seems like heat is the number 1 enemy.
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