Thought I had this solved. Sadly, I was wrong.

symptom: more noticeable at highway speeds, upon acceleration slight vibration begins, upon pushing in the clutch, changing gear, and releasing the clutch.. a noticeable shudder occurs. It also robs the car of power for a second, the minute the shudder ends, the power band feels normal again.

Checked all of my suspension components, all is in order.

Replaced driver side transmission mount, and while it lessened the shuddering as a whole, it did not solve the problem.

Not sure whether this is a clutch slipping/ chatter problem or something else.

Has anyone had this symptom before?

 

I got a very similar issue with mine. Looking forward to others input on this.

 

I also have a similar problem just recently. You can hear and feel it. Only happens in 4th gear. I figured it was my clutch or throw out bearing going bad.

 

Put it this way.. if it does it when starting off from a stop its a throwout bearing...if it does it while driving it sounds like input shaft bearing........

 

Mine must be an input shaft problem then. It only does it going into forth so I'm already moving at least 40mph

 

My tranny has had diff and input shaft bearings replaced.

No chattering or noise either. If I were to go into gear, accelerate and the shudder were to begin, if I pop it into neutral the shudder immediately disappears.

Forgot to add that this problem has been around prior to tranny rebuild, and at the same time I changed the clutch to a bully stage one. Didn't change anything.

 

You know one other thing it could be.... flywheel..the insert on stillen and fidanzas are replaceable whereas a stock one needs to be replaced or resurfaced...even the slightest warpage will cause that...i have same problem

 

I've experienced that problem for several years - I checked the transmission, motor / transmission mounts, replaced the clutch (multiple times), checked runout on the flywheel, replaced the flywheel, on and on and on.
I finally figured out what was causing my problem. The yoke that the throwout bearing rides on has worn unevenly (this is the aluminum that the throwout bearing rides on around the input shaft). It is a pretty soft aluminum - especially when it's hot. This wear can cause the throwout bearing to misalign when you're engaging the clutch. This creates uneven contact with the pressure plate, which creates clutch judder. Drove me CRAZY trying to figure out what was going on (it's real annoying and can be somewhat intermittent in its intensity).
Only real fix I know of is to replace the yoke, which means to replace 1/2 of the transmission housing. My car has 200K on it - I'm not gonna bother. I've minimized the problem by carefully applying oil behind the throwout bearing (don't want anything on the clutch) and adjusting my clutch engagement point.

 

I hope that isnt my issue lol.

 

my first thought is the fly wheel. remember the clutch is just like a disc brake setup so if it has hot spots or warpage it will cause a chatter upon engagement.

it could also be an axle. to check this you need access to a lift and drive it in the air to check for runout

 

Glazed clutch. Condensation in clutch. Weak pressure plate. Choose.

Replace OR upgrade clutch system.

 

I see you clearly missed the post where this issue has been around prior and after tranny rebuild and clutch swap.

Zoner, as per your symptoms, was the shudder relative to how you shifted gears?

If i were to shift and press the clutch and apply gas as close together as possible,almost to the point of riding the clutch sometimes there is no shudder, or its minimized by quite a bit.

If I don't pay attention to that factor and shift without really being conscious about it, then the shudder is more pronounced.

Makes it feel like the car is playing catch up power band wise to the shift when the shudder occurs. Best way I can explain it.

 

man that sucks, i remember you having this problem

i have a really good mechanic (the same one who built Akeems s/c max) and he might be able to help you. i looked for days for a vacuum leak and so did another mechanic (the a$$clown told me because i changed the IM it will run like that now -_-) but Spencer found it and fixed within a couple of hours!

I'm not being a brown noser but he works wonders and he's an honest super nice guy. His engine work in his VR6 swapped and massively turbo'd passat wagon is a work of art!

i'll PM the info

 

Much appreciated, pm me on TMEC.

 

Gonna check as per a possibly faulty cam position sensor being the cuplrit. Will report back when I eliminate that possibility.

 

Yeah please post up how that goes. Your last post where you were talking about how you'd shift like almost riding the clutch. Mine is the same way.

 

I don't think there's any clutch issue, rather a misfire from the engine causing the shudder.
Check the TPS, make sure the sweep is clean and linear.
Check the MAF signal, make sure it's responsive and also within spec. Perhaps swap with another 4th gen owner to see if it changes your shudder.
When was the last tune up! What plugs are you running. Also check the coil packs. Look for corrosion where the spring in the stalk meets the contact point on the pack itself. That will cause a misfire under a load. Could be a dirty fuel injector too.

 

bring it by the meet tomorrow night... sq1 zellers side 8 pm. i'll be there at 9.

 

You can hear my shudder when I shift into 4th and accelerate. I have been thinking that it's my clutch but all other gears shift just fine.

 

DUUUUUUDE! sick video.

 

Workin at the airport till 10. If you're gonna be around later ill swing by directly.

 

I Dont think this is your clutch because if it was then it would be doing that for all gears. Nice run tho

Also, can someone tell me how to post a new thread please. Cant find the option anywhere.

Thanks.

 

I checked my cam sensor. Aside from being dirty and the plug filled with oil (weird) it was fine.
I did however find a broken vacuum hose. It was the one going to the fuel pressure regulator. Fixed that and all has been back to normal.

 

Care to share a pic of hose's location? I also checked my cam pos sensor and its fine.

continuing the list of eliminating issues.

 

In the pic theres three 1/8 inch.rubber vacuum hoses...2 black, one grey. Ignore the grey one and the black one at the bottom. Those go to my mevi. The one at the top comes off the brass vacuum tubes under the throttle body and connects to the fuel pressure regulator. The T-fitting I was using broke and was just sucking away.