Lubejobs42
Charter Member
My new trannies showed up. They were made by Jim Lee and Tyson. The are very impressive!! Hopefully this will be the answer to getting rid of those pain in the a$$ crash boxes!! If they hold up I will be a very happy guy!
Headlines
New Transmissions showed up! BADDD!!!!!!!
- Thread starter Lubejobs42
- Start date
BraceYourself
Charter Member
What's the scoop on the transmissions. Specs etc.
Lubejobs42
Charter Member
Don't know all the particulars. Supposed to hold up to 2000 hp. They have 14 plates. jim Lee or Tyson can give the specs. Jim said they will hold up to my powr, i told him to build them.
Wrinkleface
Founding Member
Cool!!!
The following is per Tyson from another location on the internet:
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..
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..
Bigyellowcat
Charter Member
yep,, the cases started out as big blocks of billet 6061 t6 aluminum
and a bunch of maching later you end up with this..
Bigyellowcat
Charter Member
Bigyellowcat
Charter Member
If anyone is interested in some, we have 8 of the first 10 we made sold so we have two more available right now, and will start maching more in a couple months when I get caught up with some other projects..
Tyson
417-437-0665
Tyson
417-437-0665
YoungPerformance
SO Tech Expert
Very nice Tyson. Can't wait to see one in person.
Eddie
Eddie
BraceYourself
Charter Member
Nice job!
Also I think Gino was a perfect one to try the trannie on. If anyone will break one it'll be him. Not necessarily abuse just bad luck.
So if Gino is still running these in a year, you know there the real deal.
Also I think Gino was a perfect one to try the trannie on. If anyone will break one it'll be him. Not necessarily abuse just bad luck.
So if Gino is still running these in a year, you know there the real deal.
ThrottleUp Props
Sponsor / Charter Member
Expensive Date
New member
Made in the USA by Americans.Very nice
Spine Tingler
E Dock
Jim is not a bad test dummy either
Now if we could come up with some equally resistant drives:-(
LaughingCat
New member
Would love to see a video of a two speed boat in action.
Jassman
Charter Member
Jim is not a bad test dummy either
they are out there...Arnesons...work awesome on cats..:cheers2:
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