Throwout Bearing Noise

[TheCykotik1]

i know its the wrong forum but it wouldnt let me post in the drivetrain cause im a new guy on this thing. anyways when i start my car when its cold, and ive noticed this on a few 420a's, the transmission makes a very annoying screech/scratch/wheering noise. mine does not do it as bad as others i have heard but still does it. whenever i push in the clutch it stops but if i let out it starts going again. was curious if it was indeed the throwout bearing or if anyone knew how to stop it. and i will be doing my clutch soon and also looking for anyone who knows if a SACHS clutch is worth buying. heard good things about SBC and live near there so i might go that way but the SACHS i can get cheap as hell, or is there a reason its so cheap?? i have never seen anyone on hear discuss them.

 

[Locke]

Does very well sound like it could be your throw out bearing. The only way to stop the noise would be to replace it.

I know nothing of SACHS, but do recommend SBC.

 

[dr1665]

Chalk up another one for SBC. Never done business with them, but enough people I trust swear by them that I woudl vouch for them like this.

Can't say I've ever heard a throwout bearing make that kind of noise. Not to say it's not TOB, but it's certainly not the sort of thing that happens with any kind of frequency, man. Pick up a new TOB from the dealership ($45) when you install the new clutch, whatever clutch you get.

 

[roadrunner2176]

Its your throw out bearing. Usually when they start squeeling, their getting dry. Its a sealed bearing, but its lubed just like a wheel bearing. Those bearings will squeel more than normal in the winter because they freeze. When the greese breakes down and hardens inside the bearing, the warm bearing developes condensation from the cold air which freezes the bearing. Takes a few minutes to warm up and than it goes away.
Sachs is an oem clutch for a non turbo dsm which holds up quite well tp 200hp. The kit includes a throw out bearing, and is quite cheap. If your looking to up your hp, go with a better clutch, but dont get a clutch thats stronger than your trans. Factory 420a trans has been know to support 450 hp without any problems. Rather your clutch slips slightly than blowing your trans.

 

[TheCykotik1]

thanks for the advice roadrunner.

 

[roadrunner2176]

No problem,
I had the same problem, and it drove me nuts until I figured out what it was.

 

[DSMcrazy3]

Go with the SBC clutch. I went with their stage one, it's good for 250-nearly 300 whp. I don't remember how much mine was off the top of my head, but I do remember I actually got it cheaper than an OEM replacement was quoted to me at the time. Not to mention with the stage one I realized a huge difference in engagement over stock, and you don't have to worry about a stiff clutch pedal. Feels just like stock! Andy with SBC is a great guy! I accidentally broke one of the little tabs on the TOB(be extremely careful) when positioning it on the release fork and sliding it over the input shaft. As soon as I mentioned it to Andy he got a new TOB to me!

Driggs, you recommended he buy a new TOB from the dealer. Good idea, but SBC sends a new OEM TOB with their kits

 

[TheCykotik1]

o well if i get sbc i can just get a TOB from my work for cheap thats no problem. the website said the stage 1 was 350$ but that may be if you buy it online. i live like 45 min from there i can just take a cruise.

 

[Locke]

i live like 45 min from there

Be sure to PM me the times you will be in the South Bend area, so I know when to stay off the roads. It takes me a little under 40 minutes to drive from Central Elkhart to West South Bend, highway all the way.

 

[roadrunner2176]

I would give them a call before you decide to drive this way. Their good people to deal with, and can tell you what your looking to hear over the phone. I would just buy their kit, that way its their parts, everything from the same place. If anything were to go bad, or had a quick question about their product, just call sbc. Long story short, if someting comes as a kit, its that way for a reason.

 

[1.8laser90]

im glad i read this becasue mine has been doing the exact same thing specialy since its been getting real cold. I was starting to get kinda worried cause i took it on a long trip like that and was hoping nothing broke on my way. When you pushing in the clutch it goes away and comes back when u let off. It sounds pretty bad but does go away im pretty sure after it warms up. Should i get it fixed right away or no big hurry ? the car has 150k on it but the clutch feels strong like its been replaced by another owner

 

[ToDdErDoDdEr]

i'd just like to add my 2 cents and tell you that it is NOT your throw out bearing.. it is the transmission it self.. i know this for a fact because i thought the same thing and tore my car all apart, replaced clutch, throwout bearing and replaced all sychros in trans. i put it all back together and sound was still there. ive since replaced with another transmission that i got from a non-running car and this trans is even worse.. if it was your throw out bearing the noise would be the other way. it would make noise with the clutch being pressed in because of it riding on the pressure plate..

it seems these transmissions are very susceptble to damage... and i HATE that noise. i am almost tempted to buy a NEW trans for it..

 

[Locke]

if it was your throw out bearing the noise would be the other way. it would make noise with the clutch being pressed in because of it riding on the pressure plate..

I'd hope you would think about that a little bit harder. When you press in on the clutch pedal, it pulls the fork away from the pressure plate.

i'd just like to add my 2 cents and tell you that it is NOT your throw out bearing.. it is the transmission it self.. i know this for a fact because (...)

I am amazed that you can be so sure of this issue with the only information being the description of a noise. It could be the transmission. But more often than not, the symptoms described are the TOB. I would try that first, as it is cheaper to change.

Cykotic: While it is out though, you may as well check for end play in the input shaft.

Don't forget to post back when the problem is resolved.

 

[TheCykotik1]

well i ended up getting a ZOOM clutch and am pretty satisfied with it. but when i first started the car it made that noise for like 3 seconds and stopped. havent heard it since. the clutch grabs a lot better than the OE one but feels lighter and is easier to push in. didnt make much sense but it works great. just gotta drive a while and break it in so i can see what she can do.

 

[Locke]

Less pedal effort would be a softer diaphragm. (Or air in lines) Never heard of any company using a softer than stock spring, though. Wierd.

The noise may have been the grease settling over years of non-use. (Sitting on shelf)

Glad to hear the noise is gone, and let us know how that clutch works out for you.

 

[DSMcrazy3]

I'd hope you would think about that a little bit harder. When you press in on the clutch pedal, it pulls the fork away from the pressure plate.

Pushing in the clutch pedal extends the slave cylinder rod pushing the bottom of the TOB fork out causing it to pivot on the mounting ball forcing the TOB on the pressure plate.

Otherwise the clutch would never disengauge.

 

[Locke]

Forgive me, I can't figure what I was thinking at the time. Work, likely.

 

[DSMcrazy3]

Happens to us all.

 

[TheCykotik1]

actually this thing works great. it launches way better than the OE. its starting to get a little stiffer pedal though. which really doesnt make sense but as long as the clutch keeps working as good as it does i really dont care. its only a stage 1 but it makes one hell of a difference over the OE.

 

[TheCykotik1]

noise was NOT the throw out bearing. i just took my tranny back out and took it to a local tranny shop. they put new input shaft bearings in it and now it sounds great. o ya and i had to get the damn fluid at the dodge dealer @ $20 per quart that was real nice.

 

[ToDdErDoDdEr]

i was right. =]

the input bearing was one of the only things not included in my trans rebuild thing.. what a crock.. now i know i can just patch this trans that im using now instead of a whole trans again.. =]

 

[GabedsmT]

mine is been doin that for over a year and still runnin strong.. i have a stage 2 clutch tho.... ull be fine n if ## clutch is good just buy the bearin.. dont even replace the clutch(if is good) ### the bearin is only like 15 bucks that way u dont waste 200+ if ## clutch is good