scottonfire

I read this somewhere. What does it mean? To me it's like saying to put on one pant leg at a time. Are you only supposed to change one, drive on it, then change the other? I'm confused b/c I'm changing my trans mount next weekend, and I figure I would buy flex discs in case they need changing too, but they don't sell the rear and forward flex discs separately, only as a pair- so it sounds like I should change both... at the same time?

jkowtko

Who sells the flex disks only as a pair? I've only seen them sold individually (unless $80 is for the pair ...)

scottonfire

It is. On autohausAZ for $70 it's the front/rear flex disc kit.

VVF

It just means you can use it either in the front or rear Price is per each.

Wow these things are expensive. Two of those puppies and you can purchase a used Audio 20 lol

jkowtko

Yeah ... "2 per car" means that you need two of them per car. "Includes two disks" would mean that they're giving you two for the price

These certainly aren't cheap. However they take the entire load of the acceleration of your car and are made of rubber, so I'd be really wary if some cheap ones showed up from China.

Hey VVF, if you are looking for a used Audio 20 let me know ... mine should be posted in the classifieds.

VVF

There are some horror stories/pictures of failed flex disk consequences in the internet. Pretty scary. I would only go OEM in this case.

(Found your thread in classifieds. Seems like your HU screen is also starting to delaminate - main reason I was considering getting a fresh one. Maybe I can just take it off, peel the plastic crap and put some clear film on it some time.)

scottonfire

Shlt! Okay, I'm only doing one then! Assuming one isn't way worse than the other, for vibrations during acceleration (not idle or reverse) would you replace the front or rear flex disc? Obviously it would be easier to do the one next to the transmission mount when I'm replacing that (btw- NO idea if the trans mount if located in rear or front).

Glyn M Ruck

The transmission mount is at the tail of the transmission. See the Wiki. It's all there.

If you are dropping the propshaft I suggest you replace both flex discs. Examine them for cracks etc first.

RWDlifer

I've done the flex disc on a 3 series, there's only one btw the trans and the prop....where is the second flex disc on the 203? At the diff?

jkowtko

I didn't see flex disc replacement on the wiki ... here's a photo of the driveshaft parts explosion from EPC-net:


In the image, transmission is on the left, differential on the right.

Item 270 is the flex disc ... part #A-170-410-01-15. As you can see, flex discs on both sides, but it's the same part.

For those of you who venture into this DIY before me, there is also --

* the center "driveshaft support" item 150 (part #A-170-410-00-81) which you may have to loosen in order to get one of the flex discs out (not sure which one though). This is < $60 for Febi at RMEuropean: http://www.rmeuropean.com/Part-Numbe..._D18BD03A.aspx Please explain what you eventually do here in order to replace the flex discs, and/or if you replace this part as well.

* item 190 is listed as just "bearing". Part #A-008-981-43-25, About $15: http://www.rmeuropean.com/Part-Numbe..._55D21741.aspx. From the RMEuropean photos this looks like it's the bearing part of the driveshaft support part, which includes a rubber mount ring around bearing. So I assume if you're sure the rubber part of the mount is okay, and you have access to a press, you can save a few bucks and just replace the bearing. Someone please correct me if I'm wrong on this.

pcy

Part # 150 (in the above picture) is the center support bearing. That bearing tends to wear out causing drive line vibrations. If you are going to drop the drive shaft, as jkowtko suggested, replace the center support bearing as well.

Glyn M Ruck

+1^

VVF

Looks like a fun DIY :-)
So you suggest to remove the shaft from the car then? Because I don't see how you can replace the bearing without taking the driveshaft apart.
Then one needs to mark the alignment of the shaft against transmisson and diff, and the alignment of the two parts of the shaft - to avoid throwing it out of balance upon reinstallation, right?

pcy

Yes, both half-shafts will need to be marked before removing. Otherwise, OP will be chasing after drive-live vibrations.

After the flex discs and center support bearing are replaced, that drive-line will be good for the rest of cars life.