In Reply to: Not the guibo.(m) posted by dudel on August 29, 2001 at 08:14:34:
The guibo absorbs mostly lateral stresses. (Diff moving up/down relative to the tranny.) The torsional stresses are reduced due to the metal sleeves running through the guibo and tying the tranny output and driveline flanges together.
The bad guibos I've seen start to shred fabric that is embedded in the rubber. I suppose they could fracture, but I've never seen them fail that way.
Surging implies (to me at least) that you have a fuel problem. Does this happen at higher rpms?
Drove a '90 535i with 109k miles. Under hard acceleration, there was a surging sensation in 1st and a little less in 2nd that WASN'T the engine. My '70 Camaro does the same thing becasue the ring and pinion are worn and a little loose. I've driven 6 5spd BMW's and none of the others did this.
My hope is it's the guibo (rubber donut?) I hear BMW's have, but have never seen. If I put the car up, can I crawl under and move the draft shaft around and see if the guibo is going bad?