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Old 21st November 2020, 20:37   #11
macafee2
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Originally Posted by T-Cut View Post
Slacken the adjuster plate bolts, lube the plate with a spray and tap the trailing arm near the front bush. I would only do this to 'tune' them following a tracking station session. Only gentle taps. I use the Gunson Trakrite for tuning.


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Sorry T-cut but is the tool for slackening the bolts?


According to the Gunson web site it is for the front wheels (steered wheels)https://www.gunson.co.uk/product/G4008

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Old 21st November 2020, 22:46   #12
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Sorry T-cut but is the tool for slackening the bolts?


According to the Gunson web site it is for the front wheels (steered wheels)https://www.gunson.co.uk/product/G4008

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Not for slackening the bolts. For adjustment only.

The Gunson item for tracking only.---
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Old 22nd November 2020, 09:28   #13
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Not for slackening the bolts. For adjustment only.

The Gunson item for tracking only.---
but how does the Rover tool work/get used?

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Old 22nd November 2020, 10:09   #14
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According to the Gunson web site it is for the front wheels (steered wheels)https://www.gunson.co.uk/product/G4008
It detects tyre-to-road shear when rolling fowards, so the priciple applies to any wheels with adjustable toe. For most cars, this is the front ones, but the 75/ZT has toe adjustable front and rear wheels. Hope this clarifies.


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Old 22nd November 2020, 10:18   #15
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but how does the Rover tool work/get used?
Good question. I've not seen nor used the 'official' tool, but I believe the raised lugs/loops on the baseplate are somehow engaged by the tool to allow the plate to be adjusted sideways. This causes the angle of the trailing arm to change and thus the rear wheel toe. A different tool I noted online several years ago had 'claws' to engage in the loops. It was basically a lever that allows you to pull the plate in/out.



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Old 23rd November 2020, 12:12   #16
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Default Rear Toe Adjustment

The bore of the tool scales the same as the washer face of the fixing bolts so with the bolt backed out 3/4mm the tool can be engaged.
The tool looks the same as that advertised in the U.S. for the Mini so may be worth checking with dealers here to see if the sizes are the same.
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Old 25th November 2020, 14:25   #17
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Get a Gunson Trakrite shear gauge and you'll get it better than the local depot. The primary issue with DIY tracking is to have the Thrust Angle in spec first. I can't see a reliable DIY method of doing that - I suppose sombody will tell us how? So it needs a professional setup before you do the final tweek. This 'tune' as I call it is the difference between the toes being within spec and hitting the sweet spot for your particular car.


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Use this calculator https://robrobinette.com/DIYAlignmentCalculator.htm with parallel strings and You wil have a very good 4 wheel alignment DIY tool.
I am using the calculator with a couple of wood strips to keep the strings parallel each other and a good digital caliper for measurements. The results are excellent: ALL of my cars drives straight and no abnormal wear on tyres (front and rear). A nightmare everytime I have been for a wheel alignment in a garage. Hope this helps
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