Hello. Story and question is as follows.
M20b23, manual conversion by yours truly using a g260 and all that jazz
1yr - 20,000km ago i performed the following:
-new clutch
-machined flywheel
-new gearbox mounts
-engine mounts were ok at the time.
-rubber thing between the gearbox and driveshaft looks pretty new. I didnt buy it but it looks id guess less than a year old. still very firm.
Started to develop a driveline shudder at a specific rpm at around the 15,000km after above work mark. about 1500-2500rpm under acceleration, it would not shudder before this, it would not shudder after. it was progressively getting worse, but still driving fine.
I figured it was the centre support bearing. I bought a new one without even checking the old one, an aftermarket one, i cant recall the brand. whatever the generic German brand.
When i removed the old center support bearing, the bearing and rubber was still in what i would consider usable shape. the bearing was perfectly fine. If anything the rubber was stifffer than the rubber in the new bearing i had bought. If i had checked before buying a new one i wouldnt have bought a new one.
Since i had it all appart i installed the new centre bearing and rubber anyway. Everything went fine and i put it all together.
I marked the driveshaft before pulling it apart. it went back the same way as how i pulled it apart.
Not it shudders worse!!
Basically it shudders less overall but it shudders basically from about 1500-4000 or even 5000. not sure but it does go away at higher rpm. But its defiantly more than before. its a more high frequency shudder than before perhaps.
Engine mounts gone maybe? its all that is left.
Rear cradle bushes i've no idea....probably had it? can this cause this annoying vibration?
also i know i keep mentioning rpms, but the vibration is definitely speed dependent not rpm dependent.
Ideas k go!
M20b23, manual conversion by yours truly using a g260 and all that jazz
1yr - 20,000km ago i performed the following:
-new clutch
-machined flywheel
-new gearbox mounts
-engine mounts were ok at the time.
-rubber thing between the gearbox and driveshaft looks pretty new. I didnt buy it but it looks id guess less than a year old. still very firm.
Started to develop a driveline shudder at a specific rpm at around the 15,000km after above work mark. about 1500-2500rpm under acceleration, it would not shudder before this, it would not shudder after. it was progressively getting worse, but still driving fine.
I figured it was the centre support bearing. I bought a new one without even checking the old one, an aftermarket one, i cant recall the brand. whatever the generic German brand.
When i removed the old center support bearing, the bearing and rubber was still in what i would consider usable shape. the bearing was perfectly fine. If anything the rubber was stifffer than the rubber in the new bearing i had bought. If i had checked before buying a new one i wouldnt have bought a new one.
Since i had it all appart i installed the new centre bearing and rubber anyway. Everything went fine and i put it all together.
I marked the driveshaft before pulling it apart. it went back the same way as how i pulled it apart.
Not it shudders worse!!
Basically it shudders less overall but it shudders basically from about 1500-4000 or even 5000. not sure but it does go away at higher rpm. But its defiantly more than before. its a more high frequency shudder than before perhaps.
Engine mounts gone maybe? its all that is left.
Rear cradle bushes i've no idea....probably had it? can this cause this annoying vibration?
also i know i keep mentioning rpms, but the vibration is definitely speed dependent not rpm dependent.
Ideas k go!
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