Lost a driveshaft today..

[killcrap]

Originally Posted by chas3

Could you please post the part number of the joint you mentioned? Thanks.

no i will not.

[JCL]

Just speculating here, but I presume killcrap is referring to the flexible coupling in the driveshaft. Boots are installed on the front axles.

I know these couplings can fail with higher mileage on an E53 and other models for example, but I am surprised that killcrap has seen so many fail on almost-new E70s.

[ard]

Originally Posted by JCL

Just speculating here, but I presume killcrap is referring to the flexible coupling in the driveshaft. Boots are installed on the front axles.

I know these couplings can fail with higher mileage on an E53 and other models for example, but I am surprised that killcrap has seen so many fail on almost-new E70s.

Right.

His dealership is apparently the world's center for E70 axle failures

Probably part #2:

4-WHEEL drive SHAFT/INSERT nut. Fits: 2010 BMW X Series (E53,E70,E71,E83) X5 50iX | BMW of South Atlanta

[chas3]

Originally Posted by killcrap

no i will not.

Could you then post a pic of the joint you smoked?

[killcrap]

Originally Posted by chas3

Could you then post a pic of the joint you smoked?

i dont smoke. so no.

[diesaroo]

Originally Posted by JCL

Just speculating here, but I presume killcrap is referring to the flexible coupling in the driveshaft. Boots are installed on the front axles.

I know these couplings can fail with higher mileage on an E53 and other models for example, but I am surprised that killcrap has seen so many fail on almost-new E70s.

+1 IIRC these are colloquially known as guibos. First cracks start to form in the rubber around the coupling bolts then eventual catastrophic failure but usually after a 100k miles or so. Like you said...

[JCL]

Originally Posted by ard

Right.

His dealership is apparently the world's center for E70 axle failures

Probably part #2:

Driveshaft, not axle

Interesting that BMW changed from the Guibo to a universal joint. And then to a longer driveshaft with a universal joint (for production from 4/10 onwards)

A u joint typically flexes more. Could be a torque problem, a harmonic, or too short a driveshaft. Wonder how many are failing?

[diesaroo]

Looking at the training documents, it seems only the V8 models have the universal joints on the front prop shaft, something to do with needed clearance for the catalytic converters. The I-6 gassers have a front flex disc...don't know about the d's though. If I get a minute, I'll have a peek under mine to see.

[JCL]

Disagree, at least if the parts book is correct. Yours is listed as a 2009, so is different than these.

Look at this link; notice the dates of manufacture and the break point, the list of models, and the lengths of the different driveshafts:

4-WHEEL drive SHAFT/INSERT nut. Fits: 2010 BMW X Series (E53,E70,E71,E83) X5 | BMW of South Atlanta

[AtlX]

Back from the Big Easy. Tourney and French Quarter helped take my mind off the car. I sent a note to the service rep today to find out the status. I'll see what I can find out about the specific parts involved.