posted on October 08, 2013 13:31
Project E36 323is: Building the Poor Man's M3, Part 6: Tales of a Guibo: What The Hell is That Vibration?
Not too long after we finished installing our Turner Motorsports Power Package 1 update with aFe intake and Jim Conforti tune, our 323is developed a vibration under acceleration in 2nd gear. The vibration would only occur between 3,000-4,000 RPM, and it was limited to just second gear under heavy acceleration. After a few more days, however, the vibration was noticeable in all gears, and through the entire RPM range. Things were getting serious.
In order to diagnose our problem, we had to first get the car in the air and check the usual suspects: wheel bearings, axles, tires and wheel balance. Everything looked fine upon initial inspection, but after some internet forum research we came across many E36 owners who've had similar problems, and it usually came down to either the Guibo (flex disk) or the center support bearing for the driveshaft.
The Guibo is the black coupler between the output shaft of the transmission and the driveshaft. As you can see there are some noticeable cracks in ours, so it was safe to suspect that this was the culprit behind our vibration issue.
In order to replace it, the first thing we had to do was get the car back in the air and drop the exhaust and heat shielding a bit between the driveshaft and the floor of the vehicle. Here you can see Howard from TechnoSquare unbolting the rear muffler section of our Corsa exhaust.
Once the rear section was unbolted, we moved onto the middle section and the heat shield in order to gain the most access without fully removing them.
Next up we needed to remove the driveshaft, so we made sure to mark its position in relation to the mounting point on the differential. We repeated the same procedure up front where the driveshaft mated to the transmission.
Wednesday, October 09, 2013 6:53 AM
AAAgh! it is called a Giubo, not a Guibo. JOO-bo. Not Gwee-bo!
But no problem, everyone calls it that. I just thought that MotoIQ would want to get it correct
Wednesday, October 09, 2013 6:59 AM
There are also arrows on the outside of the giubo that indicate which way to mount it. A common mistake is to mount them backwards and have them rip up after a few weeks.
Wednesday, October 09, 2013 7:28 AM
That's funny! I've been spelling (and saying) it that way for 15 years, and only because that's how it's always been spelled and pronounced by every car guy and tech I've ever spoken with... Aside from the people who say, "WTH is that?"
Oddly enough, the word doesn't exist in the dictionary, but I did locate a Wiki page with references to giubo instead. I'll have to let this sit a while before editing it, as I need to wrap my head around calling it a "gwee-bo" for so many years. I sort of like that it sounds as if it should be wearing a gold chain.
Wednesday, October 09, 2013 7:46 AM
Might also want to mention that you should mark the drive shaft before separating the two parts and make sure to put it back together correctly. There's usually 2 white dots that line up but I like making my own marks. IMO it's more important than the orientation of the drive shaft to the diff input flange.
Also might want to mention proper CSB preload.
PS: If you installed the "giubo" correctly and it dies within a few hundred miles, your U joints may be bad.
Wednesday, October 09, 2013 8:36 AM
Are there options for removing the giubo altogether?
Wednesday, October 09, 2013 9:32 AM
The post should have been titled: Tales of a Vibration: What the Hell is a Giubo?
Wednesday, October 09, 2013 9:47 AM
It's one of those words that have been spelled and said incorrectly for so long that it becomes the 'correct' spelling. Nobody knows what you are talking about when you say "my JOO-bo is trashed". Lol
Wednesday, October 09, 2013 12:53 PM
What's fun is when your brother waits until it gets REALLY bad to tell you about it. WOT first gear it sounded like a someone was underneath the car wailing on the floor with a sledgehammer. Nice project!
Wednesday, October 09, 2013 2:42 PM
Here in Jamaica "baulk rings" become "barker rings" and "valve covers" are "topics covers". "Topics" is a bastardisation of "tappets". I am not sure if these are unique to us.
Wednesday, October 09, 2013 6:07 PM
This makes me want to go find a 323 and buy it...but I already have a slow car that handles well. I need. Car with a stupid amount of power. How hard is it to swap a ls motor into these?
Wednesday, October 09, 2013 6:18 PM
Japanese cars don't have weird parts....
Wednesday, October 09, 2013 6:20 PM
@b drecksage - LS swaps into an E36 are pretty common and can probably be done for pretty cheap.
Wednesday, October 09, 2013 6:26 PM
Rotary engines dont have weird parts? Haha...I kid
Wednesday, October 09, 2013 7:17 PM
I dunno Mike. The AIV valve(s) on several Nissan vehicles count as weird parts to me.