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Ranger wrote:
[quote]Turned out that my 3 month old guibo shredded itself. And that took out the vibration damper. Early truth is that the diff is ok, so I’ll end up with a spare.
Am grateful for all the offers of assistance. Friday evening I’ll be in the paddock with a cooler full of ice cold 12oz gratitude.[/quote]
Scott,
Any idea as to why a new guibo would fail so soon?
Been trying to understand that myself. If this next one fails prematurely then I guess I’ll be looking for some underlying cause that is putting too much stress on the guibo.
Top of mind guesses on early failure of guibo:
Imbalance in driveshaft
Worn center bearing allowing excess movement of driveshaft
Guibo installed backwards
Echo the previous comment about the vibration damper. Get rid of it. Will need to source 3 extra bolts to replace the “studs” that are part of the damper.
Edit: Guibo doesn’t have a front or back, but the arrows are important to align them pointing towards a mounting flange.
In addition to what Chuck mentioned as causes of early guibo failure, binding u-joints in the drive shaft are a possibility.
Psshh, I wish just my diff blew. Instead, the diff mount cracked the unibody rail and is separating the unibody from the trunk floor!!! Can’t wait to fix this!!
C’mon Stu. That’s what happens when you throw in a big motor and beat the piss out of a car. 
FARTBREF wrote:
[quote]That looks like “son of e12”…Skeen ya know what I am talking about?
Al[/quote]
If you’re referring to the floor of a white e12 tearing apart, then yes, I’m familiar with such occurrences.
I’m sure you can get a guibo easy enough, but if not I have a spare new one. See you Friday.
Skeen–
Yea, I guess it is to be expected. The chassis has about 340,000 miles on it now and it hasn’t exactly been driven lightly since I’ve owned it (2002).
JP–
I figured someone would pull the Mcoupe comment. 
I’m going to put the car in the air tonight, pull the diff, strip the undercoating in that area and a local friend is going to weld the creases and put a reinforcement plate back there to triangulate the area. Bassen apparently had the same thing happen in his euro S50 E30 M3.
If it were a low-mileage, long term car I’d do the E36 ‘twin ear’ rear diff cover, but I just need a quick fix to hold up for a year or so, then I’m going to scrap it and find a nice white/silver 318is to drive. The stiff suspension is going to come off and I definately won’t be tracking the car again.
Hope you guys have a great time at CMP this weekend, as always I’ll be looking forward to the race reports!!
