Ugh, need ideas you guys....

[z31maniac]

'88 325iS

So I'm driving home on the turnpike yesterday about 75mph or so, when out of nowhere I heard this loud "BANG" from what seemed to be the transmission tunnel.

I pulled over, looked under the hood, under the car (not that you can see much because its so low) at the rear subframe. Waited a few minutes, car is still running fine, no leaking fluids, so I finish the drive home.

As I'm driving to work this morning, I notice this low frequency vibration shaking the shifter and the car to an extent on light acceleration between 1000-3000 RPM's. The suspension feels fine, but I know this vibration was not there before.

I'm going to run by the muffler shop after work and see if I can get up on the lift, any ideas of what I might/should be looking for?

Thanks in advance!

[Devil Inc]

Possible balancing weight off the driveshaft? nut/bolt off guibo?

[ditchdigger]

It is possible a chunk broke off the guibo. Happened to me in my XR4Ti about 10 years ago at ~100mph. Scary! it really unballanced the driveshaft

[z31maniac]

It is possible a chunk broke off the guibo. Happened to me in my XR4Ti about 10 years ago at ~100mph. Scary! it really unballanced the driveshaft

I sure its possible, I figured it had something to do with the balancer or guibo on the driveshaft, I just wanted to see if anyone else here has any other ideas to keep my eye out for as well.

It's really bothering me, I'm thinking I might actually take a lunch to go get the car up on a lift.

[e30 Luv]

I sure its possible, I figured it had something to do with the balancer or guibo on the driveshaft, I just wanted to see if anyone else here has any other ideas to keep my eye out for as well.

It's really bothering me, I'm thinking I might actually take a lunch to go get the car up on a lift.

take some pics if its the guibo or center driveshaft. actually, just take some pics of whatever it is.