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Chrysler Repair/1991 jeep cherokee lerado: speedometer inaccurate

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Question
My speedometer is off by 10 mph. i have to go 65 mph on the speedometer to go 55 mph. What is wrong with it?

Answer
Hi Jesse,
I don't have manuals for Jeep that far back so I have to guess. I wonder if the tire or wheel size has been changed since the vehicle was first sold? Other than that there may be an electronic setting that could be changed with a diagnostic readout box, or a gear on the transmission output for the speedometer signal could be replaced with a proper sized one. I would check at a dealer parts counter to see what sorts of adjustments are possible.
Roland

Chrysler Repair

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Roland Finston

Expertise

Get a Free Fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

I answer questions seven days a week and respond to you in about 30 minutes. "Maxed Out" means I am answering another question, briefly unavailable, or asleep overnight, so try again later.

I have do-it-yourself experience (50+ years) and a library of 100 1982-2012 Chrysler factory shop manuals and 20 multi-manual Chrysler Corp. CD's.

I was voted "Top Expert" 2010-2015, here at AllExperts, and have answered 20,000+ questions.

Experience

Five decades as a 'do-it-yourselfer' on domestic and imported cars.

Organizations
Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Education/Credentials
Advanced degrees in Physics/bruised knuckles

Awards and Honors
"Top expert" of 2010, 2011, 2012, 2013, 2014 and 2015 here at Allexperts. Quickest "average response time" at Allexperts (currently no. 1).

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