mk1-forum.net

A friendly international forum for people interested in the tuning & modification of classic BMC vehicles
It is currently Fri Dec 13, 2019 8:13 am

All times are UTC [ DST ]




Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Fri Nov 15, 2019 3:14 pm 
Offline

Joined: Wed Sep 09, 2015 11:22 pm
Posts: 299
Bit of an odd one. I've dug Betty out of storage and she's become horrible to drive !
Suzy took her half a mile and has refused to drive her again.
Nervous and twitchy, she seems to have no stability and is constantly moving around - feels like front end but might not be. Nothing seems to be loose or clonky when jacked up and vigorously wobbled. Tracking has been checked and the toe, camber, and castor are as before.

The only thing I can think of is that I've now got an ATB fitted...
I'm fairly sure someone here will have a road-going ATB in use - so before I start stripping the front suspension are they normally like this ?


Top
 Profile  
 
PostPosted: Fri Nov 15, 2019 4:31 pm 
Offline

Joined: Mon Feb 04, 2013 1:57 pm
Posts: 634
In a word, no.
I can't feel the ATB operating compared with a normal diff. I sometimes wonder if mine is even there.

You say 'out of storage', how long? What about the tyres?

_________________
I’m giving up asking rhetorical questions. What’s the point?


Top
 Profile  
 
PostPosted: Fri Nov 15, 2019 4:47 pm 
Offline
Site Admin

Joined: Thu Jun 24, 2010 11:30 am
Posts: 13671
You won't feel an ATB in normal use. I tend to agree with lakeland The tyres could be worth looking at, also the shocks.

_________________
Mark F
Forum founder, backer & only admin for nearly 20 years.
I Must be f*&%^g mad


Top
 Profile  
 
PostPosted: Fri Nov 15, 2019 6:05 pm 
Offline

Joined: Wed Sep 09, 2015 11:22 pm
Posts: 299
Storage is a loose term, I just don't use her as much as I used to since the rust crept in. Two years since she was a daily, half a dozen outings in the last 18 months.

The tyres are newish 032s and are in good condition - I even checked that I hadn't put them on the wrong sides.
I did wonder about shocks, they are probably five years old at least, and have done quite a lot of work. Only standard spec KYBs so might be up for a change.

I've had tiebar bushes and castor/toe suggested as well, and I'm suspicious of the top arms as we've encountered a similar thing before on Tigger.

The big thing from this is that the ATB shouldn't make any difference - so thank you for that.


Top
 Profile  
 
PostPosted: Fri Nov 15, 2019 6:09 pm 
Offline
User avatar

Joined: Sat Nov 05, 2016 6:02 pm
Posts: 153
Location: Cardiff
Try greasing the ball joints. If they dry out then the front end can be a bit 'strange'.


Top
 Profile  
 
PostPosted: Fri Nov 15, 2019 10:41 pm 
Offline

Joined: Thu Sep 02, 2010 9:48 pm
Posts: 492
To much castor angle....?


Top
 Profile  
 
PostPosted: Sat Nov 16, 2019 12:12 am 
Offline
User avatar

Joined: Mon May 07, 2012 6:10 am
Posts: 3348
Location: Big Red, Australia
I find the ATB does make it feel more positive on the road, if anything.

Check Tyre Pressures, especially the Rear ones.

Check too that something (subframe?) in the back end hasn't collapsed.


Top
 Profile  
 
PostPosted: Sat Nov 16, 2019 2:10 am 
Offline
User avatar

Joined: Sat Jun 10, 2017 12:46 am
Posts: 894
Location: Cambridge, MA, USA
Pull back the gator and check the end of the steering rack where the track rod goes into the rack tube on the passenger side. If the plastic bushing has disintegrated the rack can wobble all over the place inside the tube and make the car steer all by itself.


Top
 Profile  
 
PostPosted: Sat Nov 16, 2019 8:44 am 
Offline

Joined: Thu Jul 18, 2013 7:31 am
Posts: 191
Also loose/worn splines in the steering rack to column - not easy to detect without taking apart but try vigorously turning the wheel and see if there is any discrepancy in movement


Top
 Profile  
 
PostPosted: Sat Nov 16, 2019 4:02 pm 
Offline

Joined: Sat Jul 31, 2010 5:12 pm
Posts: 334
Steering rack U bolts loose?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 27 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Localized by Maël Soucaze © 2010 phpBB.fr