E30 Zone

ive noticed that when i wheel spin in wet conditions in a strait line a get a "d d d d d d d d d" banging thuding noise is this just what bmw's do or does the noise mean there is dead bushes?

thanks sorry if this is a silly question! but ive had it on all of my e30's and 34's!

axel tramp ?

as far as i know, - its the bushes. Does exaxtly the same on mine, and i know mine are rendered. In the process of refurbing a rear trailing arm now with new ones to swap straight over - you'l be able to feel the improvement too!

chris

bushes or the exhaust knocking to come in coz it's cold outside.?

Alex wrote:axel tramp ?

i was thinking that too. always makes me chuckle a little bit too

Cook318IS wrote:

Alex wrote:axel tramp ?

i was thinking that too. always makes me chuckle a little bit too

Last time i had it it made my diff whine like a council bus

axel tramp? what does that mean?

also if this helps if i pull the handbrake sharp it thuds then too, could it be rear top mounts?

I had serious axle tramp when doing burnouts at the drag strip, especially when releasing the foot brake and allowing the car to launch forwards whilst still having the rears lit up. Every bush on my car was brand new (except the diff mount bush)

It is normal.

Apparently the new BMW motorsport group N rear axel bushes i have aquired eliminate this.

That remains to be seen.

Baz, tell me more about those group N bushes.....

Are they still rubber?

the only knocking id get was the prop centre bearing banging on the transmission tunnel.

Yes Lee they are but the voids are much smaller and i think the rubber is a different compound.

bss325i wrote:Yes Lee they are but the voids are much smaller and i think the rubber is a different compound.

part numbers this way please Baz

Do E30s suffer from axle tramp? I thought it was caused by the axle twisting on a leaf sprung rear suspension set up.

BSS. I guess they are just harder material.

Perhaps the "race/black" poly bushes you can get from various places are the same.

To the OP, it's basically everything under the back of the car moving around due to bush/damper wear.

grippy tires thats what i usually put it down to.

My mates cossy does it alot so bad the knock sensor for the fuel pump cuts in lol

DHFiS wrote:Do E30s suffer from axle tramp? I thought it was caused by the axle twisting on a leaf sprung rear suspension set up.

re anti tramp bars


not fitted to e30's

leads this "Q" not even an M3?

would the rear diff mount cause this? the car in question is a 525i sport m50 e34 but i have also had it on my e30 sports but when drifting round a track i dont get it when sidewards just in a strait line, the rear beam bushes are polly (yellow) and i have just changed pitman arms and arb links, the flex disc (rubber doughnut thing) looks in good shape as are my engine and box mounts, i may change the centre bearing as that may have been over looked, other things i was thinking it could be are:

the rear top mountings, rear diff mounting bush, or the centre bearing?

just wondering what would eccentric rear arm bush ware do to the car? do they ware badly or is it somthing that never really goes wrong?

its the rear subframe bushes mate. mine have had it too and truth be told, i should be replacing them whilst i am off work over xmas, but i really cant be arsed.

SCOTT325SE wrote:its the rear subframe bushes mate. mine have had it too and truth be told, i should be replacing them whilst i am off work over xmas, but i really cant be arsed.

the truth.

would it be that mine are polly? they are not that old afaik

Rich_W wrote:BSS. I guess they are just harder material.

bss325i wrote:Yes Lee they are but the voids are much smaller and i think the rubber is a different compound.

Rich_W wrote:To the OP, it's basically everything under the back of the car moving around due to bush/damper wear.

Everything on the rear of my sport and incidently my old S50 E30 was new and both had wheel tramp.

Its not worn out bushes causing it. The "tramp" is causes by the tyre starting to grip whilst still spining causing it to hop and there fore shudder.

magpie wrote:

SCOTT325SE wrote:its the rear subframe bushes mate. mine have had it too and truth be told, i should be replacing them whilst i am off work over xmas, but i really cant be arsed.

the truth.

Nope. See above.

magpie wrote:

DHFiS wrote:Do E30s suffer from axle tramp? I thought it was caused by the axle twisting on a leaf sprung rear suspension set up.

re anti tramp bars


not fitted to e30's

leads this "Q" not even an M3?

Anti tramp bars are designed for leaf sprung rear axels.

E30's have semi trailing arm rear suspension.

Bob_S wrote:

bss325i wrote:Yes Lee they are but the voids are much smaller and i think the rubber is a different compound.

part numbers this way please Baz

Aint got one mukka.

I bought mine off demlot but i enquired at my dealer and he said they cant get BMW motorsport parts and if i wanted them i needed to contact them direct.

oh dear. I have asked about the motorsport stuff before now and was told that it can be supplied but they don't know part numbers etc.

bss325i wrote:

magpie wrote:

DHFiS wrote:Do E30s suffer from axle tramp? I thought it was caused by the axle twisting on a leaf sprung rear suspension set up.

re anti tramp bars


not fitted to e30's

leads this "Q" not even an M3?

Anti tramp bars are designed for leaf sprung rear axels.

E30's have semi trailing arm rear suspension.

i know i've had both.
anti tramp bars on an e30 would you ever?

the gerry's were good-but not all that.

Anti tramp bars wont fit on semi trailing arms.............

anything is possible with fabrication i'm sure.just depends whether or not you need to elimanate the problem or your driving style at certain responses?

So whatever the noise is its not axle tramp.

DHFiS wrote:So whatever the noise is its not axle tramp.

cou;d well be? if ya arse end bushes aren't mushrooming over the mounts?


but ford did cure this for me

The is no need for anti tramp bars on a semi trailing arm set up as its an IRS where as, for example, an old escort has a live rear axel with half shafts and there fore not IRS.

so why the gerry tramp?

loss of traction upon bite= mas rear bush stress the time you've spent Bunny hopping


i had this in a twin wheel luton once

get some rear bush void fillers as they cut down on the movment/play in the beam.

danthe did a group buy ages ago on them.

they definetly work and cut down on the "ddddd ddddd ddddd" lol from the back end.

decent rear end bushes and void fillers is about as good as you are going to get to stop the odd noises even a good e30 will make under use.