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Old 10-15-2011, 12:18 AM   #1 (permalink)
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Default Transmission Noise 05 SRT-4

I have been trying to find related posts to this, but the details all seem to be off from the issue that I am about to describe:

I have a 2005 Dodge SRT-4 with a replacement SACHS (stock) clutch.
The car began making a sound that I can best describe as a constant clicking / rattling sound (sounds slightly like slowly shaking a rattle can). The sound occurs as follows:

Clutch pushed in at no movement - No sound
Clutch pushed in while rolling - Sound
Clutch release in Neutral - Sound
Clutch released while driving in any gear - Sound

Now we pulled the transmission out of the car and opened the case only to find a few shavings from 1 gear (normal wear) gathered in a pocket in the case and a tooth from a gear that was embedded in the case and did not come from any of the gears as we checked them all and there were none missing, so I am led to believe that the case has been opened for repair before and they missed the tooth laying in there. Regardless, no other visible damage has been done inside the transmission.

Everything visually appears to be fine inside the transmission and we put it back into place to check it and the sound is still there.

On a side note, we did recently put regular automatic transmission fluid (as we all know that our cars call for ATF) in it and this sound occurred since then. We researched and found that the car actually 'requires' Mopar ATF+4 and we have since then put the Mopar +4 fluid in its place.

With all the signs that are showing, we assume that it is a bearing inside the transmission, as the transmission gears will be moving at all times, unless you are not moving and have the clutch disengaged.

Does anyone have any ideas that could help promote my diagnostic or points to a more probably solution?
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Old 10-15-2011, 05:56 AM   #2 (permalink)
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Could be loose flywheel bolts.

Did you replace the clutch release fork with the clutch? Did you bleed the clutch after the install and adjust the pedal?
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Old 10-15-2011, 06:09 AM   #3 (permalink)
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Description sounds almost like normal clutch chatter
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Old 10-15-2011, 10:55 AM   #4 (permalink)
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Quote: Originally Posted by SNOOPALOOP View Post
Description sounds almost like normal clutch chatter

Ive had the car for 2 years and replaced 3 clutches (found out why they kept going bad on us lol)

We hadnt done any clutch work for a while when this started.

If it were the clutch, would the sound still be there when we pushed the clutch in while rolling?
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Old 10-15-2011, 10:58 AM   #5 (permalink)
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Quote: Originally Posted by OrangeBlastedSRT View Post
Could be loose flywheel bolts.

Did you replace the clutch release fork with the clutch? Did you bleed the clutch after the install and adjust the pedal?

The flywheel bolts were tightened and the threads were painted to lock them in place. We are re-using the bolts, but the flywheel isnt moving when the clutch is disengaged right? So the sound symptoms would be different?

No, we didnt replace the clutch release fork, but I did pull it out, re-grease the ball joint and put it back in with no change.

We didnt bleed the clutch system, due to not breaking into the system to require it to be bled, same with the clutch pedal.

This sound occurred after driving for about 3 months with nothing being changed other than the transmission fluid.
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Old 10-15-2011, 11:22 AM   #6 (permalink)
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Quote: Originally Posted by ultimacloud View Post
The flywheel bolts were tightened and the threads were painted to lock them in place. We are re-using the bolts, but the flywheel isnt moving when the clutch is disengaged right? So the sound symptoms would be different?

No, we didnt replace the clutch release fork, but I did pull it out, re-grease the ball joint and put it back in with no change.

We didnt bleed the clutch system, due to not breaking into the system to require it to be bled, same with the clutch pedal.

This sound occurred after driving for about 3 months with nothing being changed other than the transmission fluid.

I think you meant to say engaged (pedal pressed)? The flywheel spins with the engine, so is constantly moving while the car is running. The clutch disk and input shaft are what stops spinning when you engage the clutch.
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Old 10-15-2011, 11:28 AM   #7 (permalink)
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Quote: Originally Posted by rebellionyst View Post
I think you meant to say engaged (pedal pressed)? The flywheel spins with the engine, so is constantly moving while the car is running. The clutch disk and input shaft are what stops spinning when you engage the clutch.

But yeah, the only time the sound stops is when I have the clutch engaged and I am sitting still (which would also be the only time the gears arent moving in the transmission right?). Otherwise, its always making the sound.
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Last edited by ultimacloud; 10-16-2011 at 10:29 AM.
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Old 10-15-2011, 11:33 AM   #8 (permalink)
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I'd say find a safe gentle slope somewhere and let the car roll with the engine off, in neutral, and with the clutch pedal out and see if you hear the sound or similar. My guess is clutch chatter or loose bolts.
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Old 10-15-2011, 11:41 AM   #9 (permalink)
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Its the trans input bearing.
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Old 10-15-2011, 10:12 PM   #10 (permalink)
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Quote: Originally Posted by YellowSXT View Post
Its the trans input bearing.

how confident would you be with this analysis?
Ive heard they can be problematic, what causes them to go out?
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Old 10-16-2011, 05:44 AM   #11 (permalink)
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My guesses are the loose/backing out bolts or a worn down clutch release fork.

Quote: Originally Posted by rebellionyst View Post
I think you meant to say engaged (pedal pressed)?

No, he was right.

Clutch engaged = pedal up. Clutch disengaged = pedal down.
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Old 10-16-2011, 06:53 AM   #12 (permalink)
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Yeah people need to know the basics. I don't know how many times I've seen it on here.
Pedal pressed = DISENGAGED! Pedal released = ENGAGED!
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Old 10-16-2011, 07:00 AM   #13 (permalink)
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Its def the clutch...i had this same noise for a very long time and always thought it was normal because i changed the clutch to a shit DCR powershift. That noise one day disappeared. A day later I did a quick WOT 3rd gear pull as im coming towards my house, BOOM power gone, rolled home the rest of the way and heard nasty grinding sounds at idle. Towed it to a local tranny shop and got it open and found the splines in the input shaft were very worn in the area where the disc sits and the clutch disc completely stripped. So the problem the whole time was the clutch disc rattling on the input shaft and the splines got worn out enough that it got wedged in the teeth of the splines so the next day it gave out.....the noise i heard for almost 3 years is not normal. The noise i hear now with a pwerks input shaft and ACT clutch 6 puck is normal very quiet consistant chatter. I even kept the old shaft and disc to show people cause ive never seen it before.
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Old 10-16-2011, 10:25 AM   #14 (permalink)
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Quote: Originally Posted by prevrexowner View Post
Yeah people need to know the basics. I don't know how many times I've seen it on here.
Pedal pressed = DISENGAGED! Pedal released = ENGAGED!


Haha, thank God, I thought I was sounding like an idiot when I said it right the first time!
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Old 10-16-2011, 10:26 AM   #15 (permalink)
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Quote: Originally Posted by SRiceaTer4 View Post
Its def the clutch...i had this same noise for a very long time and always thought it was normal because i changed the clutch to a shit DCR powershift. That noise one day disappeared. A day later I did a quick WOT 3rd gear pull as im coming towards my house, BOOM power gone, rolled home the rest of the way and heard nasty grinding sounds at idle. Towed it to a local tranny shop and got it open and found the splines in the input shaft were very worn in the area where the disc sits and the clutch disc completely stripped. So the problem the whole time was the clutch disc rattling on the input shaft and the splines got worn out enough that it got wedged in the teeth of the splines so the next day it gave out.....the noise i heard for almost 3 years is not normal. The noise i hear now with a pwerks input shaft and ACT clutch 6 puck is normal very quiet consistant chatter. I even kept the old shaft and disc to show people cause ive never seen it before.

The clutch in the car is fairly new and there was no damage to it when we saw it.

The clutch is dis-engaged when your rolling and you have the pedal pushed in, so the sound would normally go away wouldnt it? However the sound is still there if I am rolling which makes me think that it isnt the clutch making the sound.
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