Replaced sisters guibo!

[Jon K]

Haha i lost, we were making bets as to whose guibo was more f-d up.

She won.

(hers on right)

[mzarifkar]

hoep you dont mind me asking, but whats a guibo?

[infinity5]

connects your drive shaft to your transmission. its also called a "flexdisk."

its a ... flexible.. disk... heh.
Can anyone explain why it has to be rubber, as opposed to a U-joint or something? is that angle of the transmission to the diff. that strange? seems like they could just reposition that stuff..

[Kalevera]

M....no, contrary to what some participants of the f/fog thread may say, there are no stupid questions -- don't feel bad about asking them. We all had to start learning at some point.

The guibo acts as a dampener between the transmission output shaft and the drive shaft. The idea is to isloate the engine/trans from the wheels/differential/drive shaft to a degree. As they're made out of rubber, and usually reinforced with metal sleeves through the bolt holes, they tend to wear out, resulting in driveline noise. I'm sure you can imagine what neglecting the part will do to the car in the long term.

Some automatics don't have them; but, generally, all E34s do.

best, whit

[Jon K]

The reason they shouldnt be solid is simply for vibration. Rubber gives. People driving 5 series sedans wanted a nice riding car not a track car. A polyurethane guibo ( heheheh... ) would mean some sacrificed driving comfort.

Also if it were solid, it would put even MORE strain on the center support bearing.

If left un-replaced, the guibo will kill the center support bearing, and vice versa... here is what that looks like, new bearing on right, old bearing on left:

[mzarifkar]

M....no, contrary to what some participants of the f/fog thread may say, there are no stupid questions -- don't feel bad about asking them. We all had to start learning at some point.

The guibo acts as a dampener between the transmission output shaft and the drive shaft. The idea is to isloate the engine/trans from the wheels/differential/drive shaft to a degree. As they're made out of rubber, and usually reinforced with metal sleeves through the bolt holes, they tend to wear out, resulting in driveline noise. I'm sure you can imagine what neglecting the part will do to the car in the long term.

Some automatics don't have them; but, generally, all E34s do.

best, whit

Thanks, how often should one replace them? or should you just visually inspect and decode from that?

[Gayle]

M....no, contrary to what some participants of the f/fog thread may say, there are no stupid questions -- don't feel bad about asking them. We all had to start learning at some point.


best, whit

Just as Jeff is the official *******, I am the official spokesperson for the totally clueless. Asking stupid (aka basic) questions is my job, and you can't take that away from me. But Mehrdad, we can share. It is a big job and I welcome some help. You can ask the questions that I miss.

[Kalevera]

Thanks, how often should one replace them? or should you just visually inspect and decode from that?

We do it by visual inspection. Get the car up in the air and have a look at the back of the trans. The guibo and proximal part of the driveshaft can be seen past the exhaust and heat shielding.

They crack, as Jon's posted pictures of, and lose chunks of material out of the sides.

I'm trying to remember the models that didn't have them. I know I've seen one or two recently, but can't think of them....argh.


best, whit

[uscharalph]

The reason they shouldnt be solid is simply for vibration. Rubber gives. People driving 5 series sedans wanted a nice riding car not a track car. A polyurethane guibo ( heheheh... ) would mean some sacrificed driving comfort.

Also if it were solid, it would put even MORE strain on the center support bearing.

If left un-replaced, the guibo will kill the center support bearing, and vice versa... here is what that looks like, new bearing on right, old bearing on left:

What bearing on the left? LOL!

[Jon K]

What bearing on the left? LOL!

haha thats really funny