starchland

Been down this road before and replaced everything short of diff and driveshaft and tranny

Short

Okay, an UPDATE:

This morning I was on the highway heading to work. I was feeling the vibration as usual and decided to push in the clutch. Bam, vibration was gone. Re engaged the clutch and it immediately comes back...

Short

Yeah I'm not too happy about it, especially since I'm suppose to be going to the Dragon for RTD in less than 2 weeks..

Did you ever get it solved?

RedCelica

I had helped Nick with this install. Initially the front bushing bolts were quite loose the next day when the vibration showed up, of which I recall torquing down. So I'm thinking either I installed something wrong (can you install the rear bushings in backwards?) and they vibrated loose, or I am having a false memory (mandela effect wuuutt), or there was another problem that was masked by his very worn diff bushings. After Nick had a local shop torque everything back down the vibration was lessened, but the issue not resolved. I'm very interested to diagnose this problem as well, as I am well vested.

starchland

Which bushings?

No. Seems to be related to cruising loads on the drivetrain. When I'm driving hard I don't feel the problem.

RedCelica

The two larger bushings on the rear of the diff. I drove his car yesterday and it was more pronounced during acceleration and deceleration. I'm also wondering if he just needs his cups swapped.

Short

Well, the car is with Jason @ CNC until tomorrow. He came with me for a test drive and noticed the vibration but didn't seem super concerned. He is going to look over the car tomorrow and repack my drive shaft with fresh grease. He also said it might just be the new stiffer differential mounts.

If he finds something, great..if not I will just turn up the music and not give a shit haha!

Thanks for everyone's help, especially Brett's (RedCelica)!

I will post an update tomorrow.

starchland

I think there are 2 different vibrations at play here. One is normal transmission and the other is more of a shake. Aftermarket mounts didn't change anything for me

RedCelica

Any update, Nick?

Short

Vibration is still there. I'm going to try and swap the cv boots first and go from there if that doesn't fix it.

I think the vibration is getting slightly worse which is a good thing. I just want something to break so I can fix it already! haha