blueLNFftw

iTrader: (16)

Have done half a dozen clutch jobs and never had an issue until this 2009 IMB LNF I bought.

Pulled my KY last night and it had completely adjusted itself and ruined the disc. < 3k on it. Previous KY did the same thing with less than 5k on it. Anyways the TOB was also making that clicking noise at idle. Pulled everything, installed new clutch and OEM LNF TOB. Got it together and the TOB seal blew bleeding it. So now I have has two bad LNF TOB that came from totally different dealers fail.
Install was correct. I've done this several times and nothing was wrong. Didn't try and bench bleed it. Let it gravity bleed while doing some other work on the car. Did a traditional bleed. Had pedal pressure on the third go. Did two more to get air out and "pop".
I've done everything Omniotek and Powell and Belvedere all say to do when installing, but still failures.

Now what? I am sick of these things failing. Should I use a LSJ one? Dorman or Centric one?

tomj77

iTrader: (2)

Idk man either u are doing something wrong or ur just getting bad tobs . Mine did go on ky after a year though. Maybe it's that ky that kills them

blueLNFftw

iTrader: (16)

KY sucks IMO. So many QC issues.

Brand new OEM flywheel is in there.

turboecotec02

I have that clicking 2. I did my own clutch 15000 miles ago replaced with Gm upgraded clutch. I hear that clicking noise at idle. It would be hell all over again to tear it down on the ground. It's going to stay clicking till it fails lol

blueLNFftw

iTrader: (16)

I may have to install the clicking one and deal with it.

Snail_SS

iTrader: (3)

So the clicking is really that loud and annoying?

blueLNFftw

iTrader: (16)

I can only hear it windows down at idle.

blueLNFftw

iTrader: (16)

Would a LSJ one be fine? NLS still work?

I can only find LSJ style to overnight.

turboecotec02

I have a lsj

blueLNFftw

iTrader: (16)

That's good and all but there are two TOB versions.

I need advice in that topic

Bass_Waves

iTrader: (24)

The seal blew ? Then could it have overextended? As in either a resurfaced flywheel or clutch disengagement teeth to far in? . Only 2 things I know that can blow the seal on a tob. Out of all the lnf tob I have installed. Not 1 failure. At the same time I've done mostly gmpp installs and my own southbend stage 4 clutch. Pulled about 4 times and reinstalled. No issues.

blueLNFftw

iTrader: (16)

Brand new OEM flywheel and brand new clutch.

Bass_Waves

iTrader: (24)

Try ditching the KY clutch and test?

blueLNFftw

iTrader: (16)

I ditched the KY.

It ruined my last TOB.

ae_xiong

iTrader: (3)

This sounds really dumb but did u make sure all the bolts were in on the tranny n properly torqued down? Because I had 3 tob failed on me because I tried to half ass it and only installed half the bolts on so that when I bled it, if it failed then it would be easy to take back apart again. Lol it was late n I wasn't thinking right after working on the car for over 12 hrs. Just make certain everything is aligned properly, torqued down to proper spec, and hopefully u don't get a faulty tob. Hope this helps... good luck man.

blueLNFftw

iTrader: (16)

It was all together. Car back on the ground.


I bought a LSJ TOB that will be here Tuesday.

LNFTX

I believe Powell said the lnf tob is better even though its a 50/50 shot if its any good but he did have a way of testing them though

blueLNFftw

iTrader: (16)

Yea, but no one ever said how to apply pressure to the port on it and you could damage it just by shooting a bunch of air into it.

I bought a Dorman LSJ style one.

LNFTX

I thought he said to bkow in it but idk i couldnt find the post

Omiotek

iTrader: (2)

im not trying to sound like a dousche bag here man but theres one of 2 things going on....... either its something with your clutch flywheel setup or your installation. the fact you had a seal blow during ibleeding makes me thing theres something wrong with your installation process somewhere. i have done probably 30 clutches in cobalts alone and i have NEVER had one blow to this day.

powell and i both agree on 98% of these installs and failed throw out bearings being installer error. not saying you did anything wrong without proof but i have found a ton of issues that happen when doing the install. last guy that had a "failed tob" ended up causing him a case.

my opinion is this trans should not be done on your back as i have found theres too many potential issues. what clutch setup did you end up throwing back in it after we talked and i told you to go with a spec clutch

ECaulk

iTrader: (6)

Omiotek what is the torque spec for the TOB? Makes me wonder if a torque wrench out of spec could cause over or under tightening allowing this issue to happen, just talking out loud not sure if that would even effect the TOB install.

Snail_SS

iTrader: (3)

Im sure it would. torque specs on stuff like that is pretty critical

ECaulk

iTrader: (6)

I haven't installed one yet so I wouldn't know

Snail_SS

iTrader: (3)

I havent either lol but maybe if it wasnt on the actual tob maybe it was on the flywheel or something else that is causing the tob to fail. The way omiotek put it that could be a possibility

ItalianJoe1

iTrader: (10)

Torque spec doesn't matter but the mounting surface needs to be CLEAN, FLAT and the TOB needs to be tightened down evenly and securely.

They blow the seals out if there's a bolt missing, they aren't sitting on the case properly, etc. It's not a great design and there isn't a lot of room for error but if you do it right you won't have an issue.

I'm with Omni, I have done at least 10 cobalt/ion clutch jobs myself, only had one TOB fail during bleeding and that was on my first one where I broke one of the bolts and figured with the other two it would still be ok. Did exactly what you describe, failed after it built up pressure. Replaced that TOB and took out the broken bolt and replaced it, was perfect. Never had another one fail on me.