Back End Twitching

GERFIX · 28th January 2009, 10:57

This is probably more of a ZT question with the stiffer suspension.

Does anyone else suffer (or suffered from) the back end twitching over ruts, bumps and pot holes? I'm not talking about tramlining, I mean when the back end of my ZT hits a not so perfect part of tarmac at speed (probably 50mph+) it feels like it skips to the side a little. I noticed it more the other day with two extra bods in the back seat.

I just wondered if anyone else had had this happen and if I need to be looking for anything wrong, or if it's just a characteristic of the car's set-up.

Everything is standard set-up BTW.

SKS Disco · 28th January 2009, 11:25

Quote:

Originally Posted by GERFIX

This is probably more of a ZT question with the stiffer suspension.

Does anyone else suffer (or suffered from) the back end twitching over ruts, bumps and pot holes? I'm not talking about tramlining, I mean when the back end of my ZT hits a not so perfect part of tarmac at speed (probably 50mph+) it feels like it skips to the side a little. I noticed it more the other day with two extra bods in the back seat.

I just wondered if anyone else had had this happen and if I need to be looking for anything wrong, or if it's just a characteristic of the car's set-up.

Everything is standard set-up BTW.

Hi,
Check your rear springs are not broken.
Usually right down the bottom on about the first coil.

GERFIX · 28th January 2009, 11:32

I wondered about that. It has done this since I bought the car over a year ago and I've just taken it as a characteristic. It's just recently I've started to wonder about it.

Rear spring check it is for starters then. Thanks.

Dave Goody · 28th January 2009, 11:42

In my experience any car with hard suspension is twitchy on bumpy bends.
More noticeable recently as the roads in my area full of small [and not so small] potholes?

GERFIX · 28th January 2009, 11:49

Quote:

Originally Posted by Dave Goody

In my experience any car with hard suspension is twitchy on bumpy bends.
More noticeable recently as the roads in my area full of small [and not so small] potholes?

I've never felt anything like the twitching I'm getting though Dave. Certainly on a nice smooth road (of which there are very few here too!) it's fine. Cornering is fine. Hit a small imperfection and the back end twitches. It's wierd.
I will have a look at those springs though, definitely.

FROGGY · 28th January 2009, 12:42

Mine has done it since I bought it, see thread here.

Still haven't found the cause, and it is now on new rubber all round.

Drive along a straight bit of road, run over a rough bit (manhole etc.), and you can feel the rear twitch.

No help at all I know, but you're not alone!

If you do cure it, post in BIG BLACK CAPITALS please.

Mick

Phil · 28th January 2009, 17:07

My first 75 saloon used to do this, on a corner, not particularly fast ad it would go a bit then almost kind of 'catch' very wierd.

M3NDEREZ · 28th January 2009, 17:13

It's not just the ZT's then, as like Phil, my 75 does it.. I just assumed it was a combination of being on the 18" ZT wheels, and needing a couple of new tyres at the back..

peelaaa · 28th January 2009, 17:46

My 75 does it too, more when wet. I have terrible wanli tyres fitted which haven't much grip in the rain. I presumed it was the tyres

FROGGY · 28th January 2009, 18:15

As I stated in my post, it's not the tyres.
Any ideas he asks again?

Mick

28th January 2009, 10:57	#1
GERFIX I really should get out more....... MINI COOPER S Join Date: Nov 2007 Location: Tranent, East Lothian, SCOTLAND Posts: 2,834 Thanks: 0 Thanked 0 Times in 0 Posts	Back End Twitching This is probably more of a ZT question with the stiffer suspension. Does anyone else suffer (or suffered from) the back end twitching over ruts, bumps and pot holes? I'm not talking about tramlining, I mean when the back end of my ZT hits a not so perfect part of tarmac at speed (probably 50mph+) it feels like it skips to the side a little. I noticed it more the other day with two extra bods in the back seat. I just wondered if anyone else had had this happen and if I need to be looking for anything wrong, or if it's just a characteristic of the car's set-up. Everything is standard set-up BTW. __________________ .......................................Colin http://i245.photobucket.com/albums/g...Cooper-S-2.jpg

28th January 2009, 11:32	#3
GERFIX I really should get out more....... MINI COOPER S Join Date: Nov 2007 Location: Tranent, East Lothian, SCOTLAND Posts: 2,834 Thanks: 0 Thanked 0 Times in 0 Posts	I wondered about that. It has done this since I bought the car over a year ago and I've just taken it as a characteristic. It's just recently I've started to wonder about it. Rear spring check it is for starters then. Thanks. __________________ .......................................Colin http://i245.photobucket.com/albums/g...Cooper-S-2.jpg

28th January 2009, 11:42	#4
Dave Goody This is my second home 15 years of 75s & ZTs now an XTrail Join Date: Nov 2006 Location: Danbury, Essex Posts: 3,761 Thanks: 18 Thanked 88 Times in 56 Posts	In my experience any car with hard suspension is twitchy on bumpy bends. More noticeable recently as the roads in my area full of small [and not so small] potholes? __________________ ZT 190 X Power Grey The Only Colour is this Dark Silver!! When I was a kid I was scared of earwigs because I thought they actually lived in your ears. I was even more terrified of cockroaches!

28th January 2009, 12:42	#6
FROGGY I really should get out more....... MG ZT CDTI Join Date: Sep 2007 Location: 17500 REAUX, CHARENTE-MARITIME Posts: 2,749 Thanks: 2 Thanked 133 Times in 90 Posts	Mine has done it since I bought it, see thread here. Still haven't found the cause, and it is now on new rubber all round. Drive along a straight bit of road, run over a rough bit (manhole etc.), and you can feel the rear twitch. No help at all I know, but you're not alone! If you do cure it, post in BIG BLACK CAPITALS please. Mick __________________ http://i200.photobucket.com/albums/a...ps628d4119.jpg IN THE BLACK NOW

28th January 2009, 17:07	#7
Phil This is my second home Rover 75 CDT Connoisseur SE Join Date: Nov 2006 Location: Wales Posts: 12,227 Thanks: 469 Thanked 523 Times in 241 Posts	My first 75 saloon used to do this, on a corner, not particularly fast ad it would go a bit then almost kind of 'catch' very wierd. __________________

28th January 2009, 17:13	#8
M3NDEREZ Posted a thing or two R75 DUB Saloon Connoisseur CDT + Synergy2 Join Date: Dec 2008 Location: Earlswood, Surrey Posts: 1,344 Thanks: 0 Thanked 0 Times in 0 Posts	It's not just the ZT's then, as like Phil, my 75 does it.. I just assumed it was a combination of being on the 18" ZT wheels, and needing a couple of new tyres at the back..

28th January 2009, 17:46	#9
peelaaa Posted a thing or two 75 cdti 2004 contemporary Join Date: Apr 2008 Location: meath Posts: 1,551 Thanks: 272 Thanked 80 Times in 58 Posts	My 75 does it too, more when wet. I have terrible wanli tyres fitted which haven't much grip in the rain. I presumed it was the tyres

28th January 2009, 18:15	#10
FROGGY I really should get out more....... MG ZT CDTI Join Date: Sep 2007 Location: 17500 REAUX, CHARENTE-MARITIME Posts: 2,749 Thanks: 2 Thanked 133 Times in 90 Posts	As I stated in my post, it's not the tyres. Any ideas he asks again? Mick __________________ http://i200.photobucket.com/albums/a...ps628d4119.jpg IN THE BLACK NOW