Aluminum\Poly Flex Disk

[chrisbec]

Thought this looked interesting, maybe even worth trying?

[Mr.Squeelerz]

That add is on every local Craigslist across the country. I would stay away from it.

[hatchgrafix]

PSshhh, I'd give it a try!! Last I heard they didn't have one for the e36 though. Which doesn't make sense, as I thought that they were the same.

BUY IT, and report back! I'm sure it will work good, and it looks impossible to screw up manufacturing, so it should be reliable.

I'll buy one when my stock one fails, or if I get positive feedback.

[pdxmotorhead]

I'm betting youll hear it, the stock one isolates sound as much as anything....
Keeps the tire noise down.

Dave

[chrisbec]

I've had my eye on this product for a while now but I think that this design was abandoned for some reason (maybe company went belly up or the product was flawed?). I say that because there is not much new information on the all poly guibo since 2004 or so... I think the RevShift version is the next evolution of this idea. I personally think that the RevShift version of this concept it looks pretty sound, can't speak for the quality of it but the idea is on point IMO. I went to the RevShift website and I also read a discussion on another forum (don't remember which one) and from what it sounds like this design was borrowed from late model domestic cars (Camaro & Challanger were the examples given). That is to say that RevShift didn't invent this product, they are just applying it to BMW's. They also say that they are developing one for the 96mm guibo like what is on the M3 ZF tranny.

Originally Posted by Mr.Squeelerz

That add is on every local Craigslist across the country. I would stay away from it.

That is where I found it, but it caught my eye. It is free advertising space for them but it does make me immediately a little suspect for some reason.

Originally Posted by hatchgrafix

PSshhh, I'd give it a try!! Last I heard they didn't have one for the e36 though. Which doesn't make sense, as I thought that they were the same.

BUY IT, and report back! I'm sure it will work good, and it looks impossible to screw up manufacturing, so it should be reliable.

I'll buy one when my stock one fails, or if I get positive feedback.

On their website they list e30's, however the application chart shows for the 4cylinder e36's. But the list isn't conclusive for all models with a Getrag s5d 250g transmission that use the same 76mm guibo??

Originally Posted by pdxmotorhead

I'm betting youll hear it, the stock one isolates sound as much as anything....
Keeps the tire noise down.

Dave

I bet your right. The 95A poly bushings in this thing have a higher spring rate K value and the dampening coefficient C value is lower than rubber. The dynamic response of this couple will not be the same as the rubber guibo. That is a way of saying that it is going to transmit different vibration frequencies than the rubber guibo from the driveline to/from the transmission. So, yes you will probably hear something different. But, I don't know that I would go as far as to say that this would be a big problem but who knows for sure until it sees some action (real time testing)?

[cooljess76]

That thing will kill all of your other bushings.

[mohaughn]

I like to apply some logic to my upgrades. So when I look at something like this, I have to ask, what are you trying to fix?

Do you have such excessive driveline shock that you are tearing a stock rubber guibo?

A stiffer guibo is not going to make the car handle better, and my stock guibo/drive shaft is pretty well balanced such that I can't feel any slop or play in it.

My general take is that poly is good for certain conditions, and certain uses. A daily driver does not need polyurethane bushings, so not sure why a street driven car would need a solid guibo.

This, to me, just seems like something to upgrade just to say you have it upgraded. I could understand if you are putting down 500hp and shredding a stock guibo, but most of us are not in that condition. I don't see it killing anything else, or harming anything in your car, although the extra vibrations and harmonics may cause a little extra wear and tear. Most people that really need stiffer bushings understand that they need to be replaced more often that regular bushings.

For me, I removed the driveshaft dampening ring, so I like that the guibo is a little softer and can take some extra driveline shock and abuse that the rest of my "system" can no longer withstand. My guibo has 150k miles on it, with over 5 years of track abuse.. I'm probably on borrowed time, but these little motors don't really abuse the driveline bushings that much.

[zoner]

I agree with mohaughn- it's one of those things that, design-wise, looks pretty cool but is it really addressing a problem or design flaw with the stock unit? Additionally, the looks might actually mean something if it was a part that was in a location that people actually saw.

[Junk]

Other cars don't have one at all and I don't notice any more tire/drivetrain vibrations or noise? I do notice threads about m3 rearends clunking though, and noticed a couple LSD diffs I bought have noticeably more slack when turning the pinion by hand than the open diff I replaced...