Plunky
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| posted on 13/1/17 at 04:58 PM |
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Misaligned rear end
Afternoon all,
I have just replaced the shocks on my F27.
Whilst spending quite a bit of time around the rear of the car I have noticed something odd.
It would appear that the rear axle is misaligned. What I mean by this is, there is a noticeable difference in how far the wheels sit in the arches.
Once side is almost fowling the arch, whereas the other is a good inch or so within the arch.
Can anyone shed any light? Is there adjustment somewhere that I can play around with?
Thanks,
Liam
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Daf
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| posted on 13/1/17 at 05:01 PM |
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Pictures would be a help, is it a live axle with panhard rod? worn bushes in it?
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loggyboy
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| posted on 13/1/17 at 05:13 PM |
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have you bolted the shocks on to the wrong side of the lower bracket?
Mistral Motorsport
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bi22le
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| posted on 13/1/17 at 05:19 PM |
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Is the bodywork square?
Try measuring from the chassis to wheel.
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Plunky
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| posted on 13/1/17 at 05:22 PM |
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quote:
Originally posted by Daf
Pictures would be a help, is it a live axle with panhard rod? worn bushes in it?
It is a live axle.
4 link arms with the panhard rod at the bottom.
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Plunky
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| posted on 13/1/17 at 05:23 PM |
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quote:
Originally posted by loggyboy
have you bolted the shocks on to the wrong side of the lower bracket?
As far as I am aware they can only go on one way. The bottom of the shocks sit in a cup type mount, if you get what I mean.
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Plunky
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| posted on 13/1/17 at 05:26 PM |
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quote:
Originally posted by bi22le
Is the bodywork square?
Try measuring from the chassis to wheel.
No idea to be honest. I'd have to go and measure...
Just seems strange that I haven't noticed in the 3 - nearly 4 years of ownership!
I have recently put new wheels on, which are wider on the rear, however there wasn't any rubbing issues and I didn't notice the side to
side variance before the new shocks were on.
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SCAR
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| posted on 13/1/17 at 05:45 PM |
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Not familiar with the F27 but a live axle chassis will have a combination of trailing/leading arms and a panhard rod that position the axle. The
shocks don't really contribute to the positioning of the axle (other than controlling vertically movement). My bet would be inaccurate
manufacture or fitment of the body tub that is now apparent with the larger wheels fitted. Align steering straight ahead and measure front to back
between the wheel centres. Both sides should be the same.
Edit ...Sorry thought you were referring to wheelbase
[Edited on 13/1/17 by SCAR]
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mark chandler
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| posted on 13/1/17 at 05:57 PM |
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If the arches are the same width then lengthen or reduce the panard rod to get it central, sounds like if needs a 3/8" adjustment.
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snapper
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| posted on 14/1/17 at 07:46 AM |
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Be careful assuming because it looks wrong it is.
The Monocoque Robin Hoods had rear arches that were not symmetrical so measure centre of hub to centre of hub front to rear either side
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snowy2
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| posted on 14/1/17 at 08:08 AM |
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i would look to see if the body is fitted correctly..
i know one guy who spent weeks replacing bushes and making adjustable trailing arms to get his car "Straight" he took it to the local tyre
fitting shop and paid for it to go on his 4 wheel laser alignment machine.......it was just about spot on... the body was fitted out by 1/2" and
it showed, when you knew.
that was a real pain to correct.
sometimes you are the pigeon, most of the time the statue.
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Plunky
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| posted on 14/1/17 at 08:56 AM |
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thanks for all of the suggestions.
I will try and get out today and do some measuring.
I do have a suspicion of what could be the issue... before Christmas I had the bottom bracket rewelded (connects the panhard rod) as the rod had
pulled the bracket in. This is probably the issue and needs readjusting.
Does anyone have any advise when it comes to adjusting the panhard rod? is the right or wrong way of doing it?
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SCAR
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| posted on 14/1/17 at 09:13 AM |
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Ahhh that could be it
If the p rod is pulling the axle out of alignment it will put unwanted strain (rapid wear) on all the other suspension bushes
[Edited on 14/1/17 by SCAR]
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Plunky
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| posted on 14/1/17 at 10:42 AM |
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Think I've sorted it!
Just went out and had a good measure. Both sides are the same front to back so I set about playing around with the panhard rod.
I adjusted the rose joint on one end to pull the axle over to give an equal gap both sides.
I'm going to take some material away on both arches to be on the safe side but overall pretty pleased!
Thanks again for all the help.
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snowy2
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| posted on 14/1/17 at 10:58 AM |
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Always good to get to the root of a problem....especially when it turns out to be easily fixed..
sometimes you are the pigeon, most of the time the statue.
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SCAR
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| posted on 14/1/17 at 12:54 PM |
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Given you have adjustment on the panhard rod you will benefit from having a wheel alignment check. Simply setting the wheel alignment by reference to
the bodywork is not great as the body work on most kits is not accurate.
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Plunky
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| posted on 14/1/17 at 04:32 PM |
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I'm going to get the car on a 4 wheel alignment soon
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