Vibration when I'm accelerating

[indo318is]

Can you guys help me. This problem just started. There is a pretty obvious vibration when I'm accelerating hard. It does it between 3,000-4,500 RPM's in first and sometimes in second. Any ideas? I had the flex disk replaced about 6 months ago, could this part have failed in this short amount of time? Thanks.

[kylebes1]

check the bolts.

[Spaz]

check the bolts.

second that, and do it soon, they can rattle off or break loose.

[Digitalwave]

Same thing started happening to my car yesterday. Brand new guibo, CSB, etc. with less than 500 miles. It was all torqued to spec.

[Kondour]

driveshaft? i had a problem and they popped in a new one and problem gone!

[Ryan Stewart]

mine did that up to about 25mph when my U-joint shot the shit. The U joint got prematurely killed by a bad CSB. Maybe your weak guibo allowed enough movement to speed up wear on the U joint.

[Digitalwave]

driveshaft? i had a problem and they popped in a new one and problem gone!

What about the driveshaft?

[Ryan Stewart]

see my post. The u-joint is a wear item on the driveshaft

[Digitalwave]

Sorry, our posts crossed eachother.

Son of a bitch, I paid good money for this driveshaft too.

[Ryan Stewart]

Is it a stock driveshaft or a rebuilt one?

I replaced mine with a rebuilt one that has a replaceable U-joint that isnt welded in. Id offer it up to either of you since I dont need it but since its for an 85 I dont think it fits.

[indo318is]

You guys reply quick. What should I look for if its a driveshaft or u-joint problem.
The vibrations does not happen with every pull, just when I'm really on it. Would that mean anything?

[Erick]

Damn, if this is a problem, my driveshaft is about to break in pieces. My car has been doing this since I got it. :?

[Ryan Stewart]

Well too bad this isnt happening to someone with an early car. :?

Mine did it under load. When I was accelerating. It was worst when I was accelerating form a stop around turns. If I let off the throttle it all but dissapeared and as I approached 25mph it faded until I became undiscernable above 25.

[indo318is]

Ryan, that's exactly what my car is doing. You had a problem with the U-Joint. Where did you get your replacement? How hard of a job will this be?

[Ryan Stewart]

That BMW driveshaft rebuilder in the roundel. "BMW Driveshafts" or something complicated like that. It isnt a horrible process but it can get tiring without a lift. You remove the exhaust and all heatshields. Thats the hard part, the rest just unbolts.

Just click the post button once and wait for it to refresh. It will.