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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 08-26-2005, 12:06 PM   #1 (permalink)
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when i get on the gas it feels like my rear end is wobbling really bad, it seems like it might come from under the center console to the back seat in that region, when im cruising normal it doesnt do it, only when i get on it, it makes the car shake really bad, help!!!!!!!!!!!!
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Old 08-26-2005, 12:32 PM   #2 (permalink)
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could it be something like your transmission mount, or engine mounts are bad - so when you torque the engine, it rocks, and mis-aligns something, but then when you are coasing, there is no torque, so stuff is lined up?

I would try to pin-point more closely where it comes from, and what type of nise. You first said makes rear end "wobble," but is it a wobble as in a driveability issue, or is it a rumble, as in driveshaft vibration.
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Old 08-26-2005, 02:19 PM   #3 (permalink)
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If its your engine mounts the car should vibrate right when you crank it up. Sounds like it could possibly be your transmission mounts though I dont think they would cause it to shake "really bad" like you said.

I have bad engine and tranny mounts and they caused my fan shroud to collapse into my fan and I think the bad transmission mounts are the reason I have a cracked flexdisc too. So if it is the mounts I would stop driving the car and get it fixed before something else goes wrong and costs you big $$$.
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Old 08-26-2005, 04:01 PM   #4 (permalink)
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Tranny mounts are easier to replace than changing your oil. I put in the e30 ones (you could go with the UUC ones, but they are kinda pricey)

When I changed mine, there was about 1cm of height difference - the old ones were so compressed.

But - to be sure, please try to give us a better description of that noise / feel.
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Old 08-26-2005, 06:55 PM   #5 (permalink)
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It is most likely that your guibo is worn out. The guibo is the rubber connector between the tranny and the driveshaft. When it wears out there is a sh!t load of vibration. If you have a good jack, not one of those bmw that come with your car in the trunk, jack up your car and look at the end of the tranny and see if you see hole bunch of threads coming out of a black rubber thing (guibo). If it is that when replacing it also check your center bearing the u joint at the end of the driveshaft.

-Serge
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Old 08-26-2005, 07:25 PM   #6 (permalink)
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He says it only does it when he's on the gas, but I would think you guibo would give you noise all the time.

It could be though, that while on the gas, the torque distorts the guibo more, and makes it more noticable.

That is a great idea to check that and the center bearing.

Pelicanparts.com has a great write on each of those items, FYI.
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Old 08-26-2005, 07:36 PM   #7 (permalink)
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Could also be the front diff mount, or maybe a subframe bushing.
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Old 08-26-2005, 08:17 PM   #8 (permalink)
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basically i just need to jack the car up and look cause everyone is saying its something different, it feels as if somehting is twisted when i get on the gas
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