Output shaft bent on a 904
I do realize that the output shaft requires a full dis-assembly. Luckily I have a good mechanic who is better at such things than me. Typically i do all my own work, but when it comes to the insides of a transmission, i leave it to a professional.
Anyway, we know that its bent because he put a dial indicator on the end and rotated it. In real terms, its a minor deviation, but for a rotating part, that small bent on the end of the output shaft makes for some serious driving problems.
As far as the vibration (more like violent shaking), a few months after getting a new driveshaft (as my old one fell off the car and was stolen), the vibrations began. They start at 45 mph, and dissapear at 65 mph. Me and the mechanic assumed it was the driveshaft. So we replaced it and the vibration stopped for a short while (about 4 days), then returned with renewed vigor, starting at around 40 and going up to 75.
The bushing, it is totally beat to crap. I don't know about the bearing, i didn't ask him, but I will now. I assume if there is a bend in an important shaft like that, that bearing is going to be going out as well.
I'm thinking that I will not be able to find the right part and I will just have to get myself a new 904 :banghead:
Just to ramble now, this especially pisses me off because when the vibration returned on the new driveshaft, I also had my steering gearbox fail. This has all happened a month after i fully replaced all my brakes with new equipment and only a few months after i replaced the entire suspension with new parts. And it ran so great for the first 4 years i owned it. Hopefully I will get this sorted out and have a fully functioning car again soon.
You do realize that you have to completely disassemble the trans. to replace the output shaft cause it goes in from the front, right?
What makes you think the output shaft is bent? If the output shaft were bent I can't see how it woulndn't break the extension housing cause when you slide the driveshaft yoke in it's a tight fit into the bushing. Is the bushing on the extension housing all beat to crap? How about the bearing on the output shaft.
When you said you replaced the driveshaft and it (being the vibration) returned do you mean it was gone for a while then returned or you actually saying it never really left, that it was still there after you replaced the driveshaft??