Automatic transmissions
#1
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Joined: Jan 2006
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Curious... anyone run an automatic trans in their boats? I have been toying with the idea however room is an issue in my configuration.
Any suggestions on availability of a short automatic to use in conjunction w/ the mercruiser /bravo1 powerplant?
Any suggestions on availability of a short automatic to use in conjunction w/ the mercruiser /bravo1 powerplant?
#4
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Joined: Aug 2004
Posts: 430
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From: Whitefish Chain - Crosslake, MN
You know what they say, Slip and Slide Powerglide. The shifting can be taylored for just about any application. I don't think I would be worried about blowing up drives. Just don't put a tranny brake on it. I think the Manufacturer is J&W, they make the supercase or something. I've seen a shorty kit for it that replaces the tailshaft and only extends an inch or two. Good luck.
#5
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Joined: Nov 2005
Posts: 4,554
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From: Fredericksburg, Va
years ago merc tried it...saw a test with it but then never heard anything more on it...but I have had the same thoughts for years, I was involved with a drag boat team years ago(many) and we were starting to play with trans's then, most ended up running lenco's and they were hard on them but worked well I thought..Rob
#9
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Joined: Jan 2009
Posts: 10
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From: Lake St.Clair, Mi
I have a B&M 2-speed trans in my boat. B&M no longer makes this trans. I purchased mine from Brummett Marine in Cali. He may still make them. I got mine more than 5yrs ago.
It IS a modified 727 torqueflight as the poster above mentioned. It is coverted to be a plug-in replacement for a Borg 72c.
It's pretty cool. 2nd gear is 1:1 ratio like a normal one-speed trans. 1st & reverse are much lower ratios. It makes docking & idling in no-wake zones possible with big engine/big prop applications. Mine is manual shifted by solenoid. All I have to do is flip a switch to go from 1st to second gear.
Mr Brummett told me there is a manual shift version as well.
I love this set-up.
It IS a modified 727 torqueflight as the poster above mentioned. It is coverted to be a plug-in replacement for a Borg 72c.
It's pretty cool. 2nd gear is 1:1 ratio like a normal one-speed trans. 1st & reverse are much lower ratios. It makes docking & idling in no-wake zones possible with big engine/big prop applications. Mine is manual shifted by solenoid. All I have to do is flip a switch to go from 1st to second gear.
Mr Brummett told me there is a manual shift version as well.
I love this set-up.
Last edited by 28' Aeromarine; 01-07-2009 at 10:54 AM.


