Originally Posted by Jassman (Post 3058133)

I think PBAM22 needs a set of these for his new power..He said he wants to rip up on some red Skater this year..Don't know who he's talkin about...but he looked determined..He said that guys all smoke and mirrors with them You-Tube videos...I'll show him..:party-smiley-004::kiss:

Originally Posted by Bigyellowcat (Post 3052775)

the transmissions are Speed shift marine transmissions... it is me and Jim Lee's company...

They are not a normal marine transmission with an extra clutch or two,,,, and they are not a 1970's power glide with an adapter to make it bolt up to a marine bell housing...

these transmissions have been in the works since 2003 when I had two speed powerglides in my boat and kept breaking them.. I bought the best transmission parts money could buy (tci stright cut 12 dp Planetaries ,,,10 clutch pack,, ect..) and even with all the goodies they still broke every time I took it out.. so after several tries with them and bams I just went direct drive with the u-joint hooked directly to the crankshaft.... and you guys thought crash boxes were bad... try no neutral and no reverse... anyway.... I decided then that I wanted to build a two speed transmission for my boat so it would be usable again... and now six years later we finally have them available for purchase... there were a few years of how to fit what we wanted in the same package size as a bam so they would be a direct replacement. then we built some and put them in Jim's 46 skater a year ago.. we have made some changes to the valve bodies.... the first ones we built were fully electronic shifted with a toggle switch .... and then we built a manual shift for it... so the ones that are in jims and gino's are manual shift with your shifters from first, neutral, and reverse just like a bam, and then when you want to go to second there is a toggle switch that switches both of them at the same time..
we have tested these extensively in the 46 skater in rough seas leaving the throttle on the dash trying to break them, and so far have never broke any parts in them, there are some changes to oil passage ways and cooling passages to keep the temp down but the same internal parts are still the same ones we originally built them with...

as far as horespower rating for them.... we have ran them on our dyno with an 1800 hp engine and they did not slip... the internal parts should handle 2500 hp... but I will not be able to test that hp for a couple more months till we get my new engines done.... the good thing about every single part being made in-house is that if we do put bigger power to it and have a problem we will just make it stronger..

we have made all the different input shafts... the standard bam small spline,,,, the short crash box big spline,,,, the long crash box smaller spline...

technical specs...

first gear 1.5 to 1 good for docking and getting on plane without putting alot of low rpm load on the engine, keeps engine from dying when you are going in and out of gear...
and perfect for turbo engines that would have trouble being over proped and not being able to get on plane...

second gear is 1 to 1 when its in high gear all the internals are spinning the same direction... it basically locks the input shaft to the output shaft,, the only thing drawing power is the oil pump to put pressure on the clutch pack... so there is so little horsepower draw that we could not measure it at 6000 rpm. I would assume less then 5 hp...

reverse is 2 to 1 which is good to not have the engine die when it goes in and out of gear but props do not work well spinning backwards because they were not designed to work that way, and the prop wash hitting the back of the boat... but they work fine and if you need to backup faster you may need to rev the engine alittle.. a crash box has the same problem of being lower geared in reverse...

Length: 12"
width: 12"
height:13"
weight: 110 lbs
$12,000 each

available as electric shift or manual shift..

Tyson
417-437-0665

Originally Posted by 10x (Post 3053056)

Here they are in Jims 46 back in july 08.

Originally Posted by JAMESP7453 (Post 3060142)

Ever consider using one coupled to a turbine. Check out our web site. My name is Jim I have a few questions 520-245-2849 www.principlepropulsionsystem.com or www.ppsmarine.com

Originally Posted by JAMESP7453 (Post 3060142)

Ever consider using one coupled to a turbine. Check out our web site. My name is Jim I have a few questions 520-245-2849 www.principlepropulsionsystem.com or www.ppsmarine.com

Originally Posted by jaysflatdeck (Post 3060159)

WHAT KIND OF VALVE COVERS ARE THOSE ON THE MOTOR I LIKE THE CLEAR TOP

Originally Posted by FREEDOM US1 (Post 3060173)

We are running our transmissions in a turbine boat this weekend. We will let you know how it works out after the test runs.

Originally Posted by jaysflatdeck (Post 3060159)

WHAT KIND OF VALVE COVERS ARE THOSE ON THE MOTOR I LIKE THE CLEAR TOP

Originally Posted by Bigyellowcat (Post 3062301)

The transmissions worked fine with the power of the turbine...