shuddering from drivetrain

[T Verdier]

a while back i bought an 87 325is it has a bad shudder when accel. and deccel. until about 30mph but when i put the clutch in or maintain throttle so theirs no load it doesn't shudder. ive hade the drive shaft checked,center support,guibo all that.my diff is a little worn but not terrible.
Could it be some thing in my tranny? also it starts out at a low speed shudder and aroud 25 or 30 it s more a vibration

Sorry for the horible punctuation and spelling.

[scabzzzz]

Checked your engine mounts? Trans mounts?

And did you check or a real shop check?

[brn2ply7]

I have the same !^%$N ISSUE!

[twistednut]

Who did you have check it? Reason I ask is because I bought a 88 325is two weeks ago which had the same problem. The lady who owned it had the guibo and the center bearing change just a few months ago. As soon as I replaced the drive shaft the problem went away.

[JSiN]

my 87 325is does the same shudder-annoying thing too.... and also its no so bad up to 20mph, but then from like 25-40mph, all bad.... so this past weekend i was up under the car changing out the shifter, and i noticed that one of the bolts that goes into the guibo is missing....its just not there.... could this be the reason? regardless i'm gonna replace the bolt, but it would be sick if that fixed the problem...

[Aptyp]

I know you said that you checked the driveshaft,


But I say it's driveshaft. Center bearing, guibo, u-joins (2), and balancing mechanism inside of the rear half of the driveshaft.

take it off, and shake it.

[brn2ply7]

Did you ever fix the issue???

[mattdk318i]

incase it hasnt been fixed....just replace the driveshaft like discussed above. I had a similar problem in my cabrio...and now it drives like butta!
driveshaft probably wasnt aligned when they replaced those parts...

[brn2ply7]

What do you mean by aligned?

[mattdk318i]

they are balanced from the factory. They were marked from the factory with white dots. Sometimes the dots wear off.
But if you take the driveshaft apart for a CSB install. You MUST MUST MUST mark the driveshaft and put it back together the same way.

[brn2ply7]

So what happens if you replace the driveshaft with a reman like i am going to have to do haha?

[mattdk318i]

should be aligned when it was manufactured. Or it will most likely have line-up marks on it.

[brn2ply7]

Well ill take a look under my car to see if thats what f***** up and gave me this bad vibration. It is the same one that was described above in the first post. ANd i let it get bad!!!
Bad enough that its been sitting for two months.

[danny325is]

Just got done replacing the Guibo and CSB. the Virbation didn't go away. I should have just replaced the whole shaft. ^%#^@.

Any good deals on Reman Drive Shafts?

[maco325e]

Just got done replacing the Guibo and CSB. the Virbation didn't go away. I should have just replaced the whole shaft. ^%#^@.

Any good deals on Reman Drive Shafts?

I went to a machine shop they replaced thr U-joints on mine and no more vibration, just make sure the dots are aligned when You reasemble the drive shaft back in the car and thats it. And they charged me $65.00 including the U-joints.:D