Lock up problem

[marc75]

Hi everybody i need help to find my problem i run a built trans and when the lock up is applied in 4-5-6 gear at 40-75% throttle i have a big vibration so i hook up the tech2 and when the vibration is there the TCC slip go to 100rpm as soon as it slip....fresh trans built and brand new Goerend w/billet stator.....changed the converter and still have the vibration and slip.....Allison pump stator ? Body valve ? Tried the Transgo lock up valve w/no ball and longer spring and modified lock up valve too.....when im wot everything is ok so i think i have a pressure issue but if someone can put me in the right direction ill appreciate thank you

 

[THEFERMANATOR]

Have you tried a new lockup solenoid? Sounds like maybe it is having trouble when it isn't at full lockup pressure, so maybe the F solenoid isn't sending full pressure to the apply circuit for the converter.

 

[marc75]

I ll try a new one this afternoon and let you know thanks

 

[Mike L.]

The stator shaft might have twisted slightly or a broken ring on the stator shaft can also do it. If you wind up pulling it, also look at the converter flow valve to make sure it's ok.

 

[marc75]

Ok thank you Mike....ill take a look at it tomorrow morning and let you know thank you guys

 

[marc75]

Ok.....changed front support ( stator ) speed sensor input changed TCM changed bodyvalve and put new F solenoid and still same problem....it worst when it is in load lime climb a hill ....wot shift perfect....with DOC it can help if i reset the TCC ? Don't know what to do now.....im about at 1000whp....goerend R converter ..(tried a 1053 that i have and same thing ) Suncoast clutches main pressure spring kit trim a-b and shift valve spring...stock modified lock up valve....do i need stronger spring with stock lock up valve ?? Thank you for you help......im thinking to go at the bar and drink all i can

 

[andy-stevenson]

How many miles on the build? Who did the build? What clutches were used?

 

[marc75]

100 miles on built i built it my self but the slipping pribleme was there before built so i thought it was the lock up piston in converter and i start over ....c1 alto c2 raybestos c3-c4 alto carbonite suncoast stuff

 

[JoshH]

What kind of pressure is the trans putting out?

 

[marc75]

Im not there yet but i changed de pump too..... Forgot to mention that i have the snake oiler too but im sure it don't drop the pressure

 

[marc75]

Any idea guys ?

 

[Mike L.]

Get pressure reading. Which C3 oiler are you running? If mine; is it modified?

 

[Awenta]

What happens if you command lockup

Sent from my SM-N910V using Tapatalk

 

[marc75]

Yes Mike it's yours.... Added a DHD lock up box and donthe same thing ....i started over with another core because i was powdercoated so i thought may be it "twist" with the heat......the only thing i kept is internal switch....and when i look the data to see the ratio like in 5th gear im at .71....when it slip the numbers changed so ill change that switch what do you think ?

 

[marc75]

Here is a vid you ll see at the end what happen

http://www.youtube.com/watch?v=V7fBEDYEM6k

 

[marc75]

Pressure at idle

http://www.youtube.com/watch?v=47snIwKRMRg

 

[marc75]

Pressure luck up applied

http://www.youtube.com/watch?v=LAk0Duid3sI

 

[Mike L.]

You're not showing anything that will help.
Go to special functions transmission, and pull up TCC. Watch what happens. Does the tech 2 show any apply? If so, what is the slip speed? Can you apply TCC manualy? If so, what happens?

 

[marc75]

It slip under light load... When it slip i have a good vibration and tcc slip is at 100rpm but a soon as it slip i release the fuel pedal...i can log with EFI Live ig you want to see....the vids i made it slip and the pressure stay it didnt drop

 

[marc75]

Can the transfert case can do that ?? If the speed sensor on transfert case dont read the correct info to match the input speed sensor ?? And when it slip it s negative....-100rpm but im in acceleration