help. slipping clutch or gearbox under load

[suprasaltareaud]

Hi guys. Hoping you can help. Boat has been running great since the engine rebuild but i took it out today for a run after carby rebuild and after 20 minutes i pulled up the took off again. At about 2000 rpm the clutch or gearbox slipped (revved but shaft was disengaged) and engine revved but wasnt going anywhere. It took off ok but as it started to get on plane it slipped. Then it did the same thing the next 4 times i tried to take off at varying speeds/load. I could get it up on plane if i gradually built up the speed but if i tried to boot it it would slip/disengage. Put into neutral then it would engage again. So it is load related.

Any help PLEASE.

Thanks guys.

:( :confused: :frustrated

Jason

[Cusefan78]

Tranny needs a rebuild. The ceramic discs are worn

[suprasaltareaud]

Thank you. not sure about how to fix that but will look at exploded diagram and try to work it out.

Thank you.

Jason

[Cusefan78]

There isn't much to them. What tranny do you have?

[suprasaltareaud]

Borg warner 1 to 1.
boat is a saltaire 87 model with 454.
the rear engine mounts are attached to rhe gearbox so will need to lift engine i think.

[suprasaltareaud]

So what do i need to order? Clutch plate Inner or outer or a clutch plate pack?

Thanks

Jason

[Cusefan78]

Get a tranny rebuild kit. Comes with all the discs, seals and gaskets. Call skidim.

[wotan2525]

STOP!

Check the fluid first.

Low fluid prevents the clutches from engaging. Happens to me a couple of times per season (there's a leaky seal somewhere.) Top it off with fluid and you're good to go again.

[Cusefan78]

Well I was assuming he checked the fluid first

[suprasaltareaud]

Yes i have checked the levels. In fact i drained the transmission when i had the engibe out last month and put new fluid in. Thanks though.

[suprasaltareaud]

Was probably happy with the old fluid and now it has new fluid it didnt like it. I hope dexron 1, 2, 3 compatible fluid is ok?

[Cusefan78]

I'm guessing your friction plates are worn out. Going to need to be rebuilt. I did a thread on here on how to rebuild them. The Borg Tranny is similar to mine. So the steps should be about the same.

[suprasaltareaud]

Great thank you. I will look for it. Thanks for the advice guys.

Jason

1987 Supra Saltaire 454 Chev

[lively]

go on ebay the have them for 150$ and make sure to bench test it before you put in the boat , check for leaks and such very easy to rebuild

[suprasaltareaud]

Thanks guys. I rebuilt it on the weekend and was fairly straightforward. Had a few bolts that were a little stubborn but all done. Took it for a quick run on the weekend and it worked beautifully.

Thanks for the help guys.

Jason