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I'm in the process of up grading my old drum brake open wheeler diff to a disc brake LSD. Going good so far but the question that's got me puzzled is the diff ratio in my new diff is 4.11, this is going to put my speedo out I know but I don't know how to rectify the problem. Thoughts and solutions much appreciated.
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It shouldn't put your speedo out heaps but just get a gps and figure out the speed differnce so for eg if 70 becomes 50 just remember that when your driving otherwise you'll have to pay for recalibration
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Can you pay to get your clusters recalibrated ?
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Yea it can be done but can cost there's a couple of instrument reconditioners about
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Get yourself a ratio box. Sits on the side of the gearbox. speedo cable goes into that as normal. This is what I did. That's the permanent fix. If you do it at the cluster it may not be as reliable. 5 years, no problems. The difference was like $200. Do it once and do it rite.
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Where can I source a ratio box? Can you buy them from your average car parts place eg. Repo auto barn. Or a specialist?
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I got it all done at the instrument reconditioner.
They should be able to take care of it.
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As above. Changing to different diameter wheels alters your true speed as well.
It's very expensive to modify your cluster for the sake of a diff gear change. Just source a converter.
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