New answers tagged differential
If your diff ratio has been changed for offroad use your speedometer will be innacurate. Much so if larger tyres are fitted.Purchase an after market speedo cable corrector (available for both needle dial( as in your case) or digital speedos.The faster you go the greater the error i.e.29" to 30" inch tyres with 4.11.1 ratio can see a false speedo reading at ...
Not an answer but bear in mind if you change ratio your speedometer will be inaccurate. Affordable after market easily fitted devices are available for both old school needle and dial and digital speedometers
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