Kind of cross-posting from a topic in the General forum regarding giubo orientation.
I have a bit of a drivetrain buzz / vibration in the 3k-4k range or so, which is especially a problem because I mainly am driving on the highway not to mention it kills the driving experience.
I searched and came back to the giubo subject in may discussions, though at times the symptoms of topic are at lower speed where my car feels relatively smooth.
I only have a few thousand miles on my S50 swap - the motor and transmission are rebuilt, I used new standard rubber mounts everywhere and got the "OEM" giubo from Pelican, the driveshaft is out of the M3 with a new CSB (it was at the time of swap anyway), and goes to a 2.93lsd. Wheels are balanced and I have replaced the control arms and literally every piece of rubber in the suspension front and rear.
I inspected my giubo today :
On screen it might be tough to tell but, the arrow indicates my installation is wrong. Reading the instruction on how it should be, I knew that I hadn't noticed or heard how do it right when initially doing the swap.
I haven't done too many miles with it like this and the rubber shows no signs of deterioration, only flash from manufacturing. I was expecting worse. Maybe I'll notice more when I adjust it. I'm wondering if the flex disc might have just softened enough over time to reach a point where it allows resonance despite not being cracked.
I'm sure it won't last as long but I'll clock it correctly and give it a whirl, and report back. I'm hoping that I won't need to replace my driveshaft, maybe I killed the CSB? Maybe the centering sleeve is the issue? How can I tell if the u-joints are bad?
Also - is that left side trans mount busted? I might have to get the UUC cups..
I have a bit of a drivetrain buzz / vibration in the 3k-4k range or so, which is especially a problem because I mainly am driving on the highway not to mention it kills the driving experience.
I searched and came back to the giubo subject in may discussions, though at times the symptoms of topic are at lower speed where my car feels relatively smooth.
I only have a few thousand miles on my S50 swap - the motor and transmission are rebuilt, I used new standard rubber mounts everywhere and got the "OEM" giubo from Pelican, the driveshaft is out of the M3 with a new CSB (it was at the time of swap anyway), and goes to a 2.93lsd. Wheels are balanced and I have replaced the control arms and literally every piece of rubber in the suspension front and rear.
I inspected my giubo today :
On screen it might be tough to tell but, the arrow indicates my installation is wrong. Reading the instruction on how it should be, I knew that I hadn't noticed or heard how do it right when initially doing the swap.
I haven't done too many miles with it like this and the rubber shows no signs of deterioration, only flash from manufacturing. I was expecting worse. Maybe I'll notice more when I adjust it. I'm wondering if the flex disc might have just softened enough over time to reach a point where it allows resonance despite not being cracked.
I'm sure it won't last as long but I'll clock it correctly and give it a whirl, and report back. I'm hoping that I won't need to replace my driveshaft, maybe I killed the CSB? Maybe the centering sleeve is the issue? How can I tell if the u-joints are bad?
Also - is that left side trans mount busted? I might have to get the UUC cups..
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