|
Less of a u-joint and more of a driveline dampener. I've owned 7 BMWs and never had to replace one.
|
#
?
Oct 13, 2015 04:37
|
|
|
|
| # ? May 18, 2024 20:39 |
|
|
Both of my ACVWs have a big rubber puck like that that is between the steering column and the steering box. Similar?
|
|
#
?
Oct 13, 2015 05:12
|
|
|
DiggityDoink posted:I thought you made up that word or misspelled something badly. Of course it's a BMW only thing. Well, he did misspell it at least. It's giubo, in Italian "giu" sounds like "Jew"
|
|
#
?
Oct 13, 2015 05:20
|
|
|
Its a flex-coupling. Dampens vibes and allows like 5-15 degrees of movement.
|
|
#
?
Oct 13, 2015 05:41
|
|
|
Geirskogul posted:Both of my ACVWs have a big rubber puck like that that is between the steering column and the steering box. Similar? Yeah but that version is called a rag joint because the original ones were actually thick layers of fabric/leather to dampen vibrations and give a little bit of play.
|
|
#
?
Oct 13, 2015 05:47
|
|
|
Why is everyone hating on the Guibo? I've always seen it as a fuse of sorts in the driveshaft and think it's pretty clever.
|
|
#
?
Oct 13, 2015 07:28
|
|
|
8ender posted:Why is everyone hating on the Guibo? I've always seen it as a fuse of sorts in the driveshaft and think it's pretty clever. If you want more power they're probably not good but besides that I've never really seen the problem either.
|
|
#
?
Oct 13, 2015 08:22
|
|
|
Slavvy posted:If you want more power they're probably not good but besides that I've never really seen the problem either. Yeah, they're pretty similar to the dampers between the sprocket and wheel in a bunch of motorcycles. Same deal, reduces shock loading and provides a bit of damping.
|
|
#
?
Oct 14, 2015 03:36
|
|
|
Yeah, he was feeling a bunch of odd vibration while accelerating but not while at a set cruise speed. Ergo, the giant rag joint driveshaft coupling was probably the culprit. We got it swapped out and poof, vibration gone. But being a BMW it went about as well as this video: https://www.youtube.com/watch?v=5_kS8qrFiCE
|
|
#
?
Oct 14, 2015 04:05
|
|
|
At least BMW doesn't use goddamn torx or hex bolts to fasten the DS to the diff or transmission. Whomever thought of that needs to die. (gently caress you, Honda)
|
|
#
?
Oct 14, 2015 04:09
|
|
|
8ender posted:Why is everyone hating on the Guibo? I've always seen it as a fuse of sorts in the driveshaft and think it's pretty clever. I wasn't necessarily hating on it, it just seems kinda pointless other than to reduce NVH, which will almost by definition, kill power.
|
|
#
?
Oct 14, 2015 06:28
|
|
|
Once it's compressed, it's compressed. You'll likely have a few ms of delay when you hit the throttle, but I don't see how it 'kills power.'
|
|
#
?
Oct 14, 2015 14:15
|
|
|
It's a spongy link in the drivetrain, vibrations that would otherwise get transmitted to the ground get converted to heat. Yes, some of that is lost power. Engines don't put out perfectly smooth torque, it comes in pulses; that soft joint is going to soak some of that up.
|
|
#
?
Oct 14, 2015 15:24
|
|
|
And if it was any statistically significant percentage of the output of the engine the rubber block would be on fire in a matter of seconds. Remember, we're talking about putting 150+ kilowatts through this link (200hp.) Even 1% of that is roughly what a 100 amp 110V arc welder puts into a piece of metal stock... continuously. Does it absorb some power? Yeah. Any significant amount? Hell no, it's practically a rounding error. I don't want giubos in my driveline, but power loss isn't the reason, it's because they can't handle as high an angle as U-joints, aren't as high strength, and wear out faster. They probably are easier to service, however, at least if put in a tall 4wd chassis instead of over a million heatshields and exhaust systems in a low car.
|
|
#
?
Oct 14, 2015 15:46
|
|
|
fakeaccount posted:what the gently caress is a guibo? Its an italian man whose D is grown the wrong way
|
|
#
?
Oct 14, 2015 15:51
|
|
|
DiggityDoink posted:I wasn't necessarily hating on it, it just seems kinda pointless other than to reduce NVH, which will almost by definition, kill power. Alright, let's see your solid engine mounts, transmission mounts, diff mounts, subframe mounts, etc in your street car.
|
|
#
?
Oct 14, 2015 16:24
|
|
|
There's no way it is 'killing power' in any significant manner.
|
|
#
?
Oct 14, 2015 17:02
|
|
|
kastein posted:I don't want giubos in my driveline, but power loss isn't the reason, it's because they can't handle as high an angle as U-joints, aren't as high strength, and wear out faster. They probably are easier to service, however, at least if put in a tall 4wd chassis instead of over a million heatshields and exhaust systems in a low car. On for example my e46 the driveshaft passes through the guibo with what I want to call a slip joint? Total failure mode means no transmission of power but the shaft stays in place. What in getting at is no angle. The only place I've seen them at an angle is goodbye turtles hillman imp, but they were like 2" 
|
|
#
?
Oct 14, 2015 18:39
|
|
|
Lotus used them in their early racing cars and some road models as well https://www.google.com/search?q=lotus+rubber+donuts&biw=1412&bih=923&source=lnms&tbm=isch&sa=X&ved=0CAgQ_AUoAmoVChMIoZSp39PCyAIVhyemCh1zYQrS
|
|
#
?
Oct 14, 2015 20:06
|
|
|
Dannywilson posted:Helped my buddy change out the giubo on his BMW 318ci this weekend and it was a nightmare hellscape of destroyed rubber and fibers and weird polymers: Ohh... Oh! I know them as an elastic coupling or a donut. The Niva has one of those between the transmission and transfer case. Here's someone's video of one failing. https://www.youtube.com/watch?v=ylJfmLfDqXE
|
|
#
?
Oct 14, 2015 20:52
|
|
|
From what I've read, guibos aren't designed to handle the flex involved in driveshaft misalignment, so they're not a real alternative to a u-joint. Ireland Engineering uses machined metal dummy guibos to test-fit the drivetrain alignment, then swap it out for a rubber one.
|
|
#
?
Oct 14, 2015 21:14
|
|
|
meatpotato posted:From what I've read, guibos aren't designed to handle the flex involved in driveshaft misalignment, so they're not a real alternative to a u-joint. Ireland Engineering uses machined metal dummy guibos to test-fit the drivetrain alignment, then swap it out for a rubber one. Modern BMWs don't need a whole lot of capability to deal with changing angles in their driveshafts. Since they have independent rear suspension, and the rear diff is mounted to a subframe, any changes in driveshaft angles are quite small. In fact, the front section of the driveshaft, from the output flange to the center support bearing, should not have any movement or angles involved beyond the flexing from the motor/transmission mounts.
|
|
#
?
Oct 14, 2015 21:37
|
|
|
meatpotato posted:From what I've read, guibos aren't designed to handle the flex involved in driveshaft misalignment, so they're not a real alternative to a u-joint. True. I think they are more for connecting two separate things which are intended to rotate on the same axis. The most common way I've read of aligning the Niva TC with the transmission is to put the TC in neutral and loosen the mounts, get the engine spinning at a few thousand RPM so the donut is going nice and fast, and tighten the mounts back up. Can't speak for others but I find that a touch unsettling.
|
|
#
?
Oct 14, 2015 23:25
|
|
|
Friend posted this broken flywheel on FB.
|
|
#
?
Oct 15, 2015 00:01
|
|
|
That's some weird galling on that bottom bolt hole
|
|
#
?
Oct 15, 2015 00:11
|
|
|
wildemere posted:Lotus used them in their early racing cars and some road models as well Holden/Pontiac use them on their transmission to driveshaft coupling as well.
|
|
#
?
Oct 15, 2015 01:29
|
|
|
The beginnings of a horrible failure. The gasket is bad enough that it hydro-locked the motor after it is shut off. https://www.youtube.com/watch?v=utZ3cVzX3hE
|
|
#
?
Oct 15, 2015 01:32
|
|
|
Dannywilson posted:Yeah, he was feeling a bunch of odd vibration while accelerating but not while at a set cruise speed. Ergo, the giant rag joint driveshaft coupling was probably the culprit. We got it swapped out and poof, vibration gone. But being a BMW it went about as well as this video: That video is the classic case of trying to take a shortcut and spending more time than if you'd just done the drat job properly and removed the center exhaust section in the first place. Then you can get the heatshield out of the way and have as much room as you're going to get under there.
|
|
#
?
Oct 15, 2015 03:43
|
|
|
Yeah, that's what we ended up doing, specifically because of seeing that video prior to starting the job. E: there was still a ton of swearing at that whore of a car, even with the exhaust dropped.
|
|
#
?
Oct 15, 2015 04:05
|
|
|
BlackMK4 posted:At least BMW doesn't use goddamn torx or hex bolts to fasten the DS to the diff or transmission. Whomever thought of that needs to die. (gently caress you, Honda) Torx is awesome, only triple-square is better.
|
|
#
?
Oct 15, 2015 04:25
|
|
|
Frank Dillinger posted:Torx is awesome, only triple-square is better. torx would be ok if there weren't 30,000 variations with security torx, torx plus which sould mean either larger nodes or 5 points The bolts that hold the box in in ford trucks are T55 torx plus, which is an expensive enough bit, but you're bound to snap at least 2 bits pulling those bitches out.
|
|
#
?
Oct 15, 2015 04:50
|
|
|
Powershift posted:torx would be ok if there weren't 30,000 variations with security torx, torx plus which sould mean either larger nodes or 5 points Hahahaha, if you can get them out without cutting them.
|
|
#
?
Oct 15, 2015 05:14
|
|
|
Do you see? Do you see? DO YOU SEE? 
|
|
#
?
Oct 15, 2015 05:16
|
|
|
Powershift posted:torx would be ok if there weren't 30,000 variations with security torx, torx plus which sould mean either larger nodes or 5 points If they're tight enough I can't get them out with a regular 1/2 ratchet I grind the goddamn head off and install all new hardware afterwards. Cheap on rockauto and totally not worth screwing around with.
|
|
#
?
Oct 15, 2015 05:27
|
|
|
14 INCH DICK posted:Do you see? I'm scared of that thing. Why the gently caress does it have 8 ports?
|
|
#
?
Oct 15, 2015 05:34
|
|
|
14 INCH DICK posted:Do you see?  ahahaha, all of a sudden that 10 year old $20k Quattroporte on CL doesn't seem like such a good idea. What the gently caress is this poo poo
|
|
#
?
Oct 15, 2015 05:35
|
|
|
Dannywilson posted:I'm scared of that thing. Why the gently caress does it have 8
|
|
#
?
Oct 15, 2015 05:45
|
|
|
14 INCH DICK posted:Do you see? That water pump had better be a miniature V6 in it's own right. 
|
|
#
?
Oct 15, 2015 05:48
|
|
|
14 INCH DICK posted:Do you see? We won't need eyes where we're going.
|
|
#
?
Oct 15, 2015 06:16
|
|
|
|
| # ? May 18, 2024 20:39 |
|
|
14 INCH DICK posted:Do you see? Seeing stuff like this makes me wonder why people are always eyerolling at german engineering when the italians do it so much loving worse. Also it probably has something to do with being a ferrari engine.
|
|
#
?
Oct 15, 2015 07:30
|
|