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CokeAndHennessy

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Since: Oct 28, 2003
Posts: 1



(Msg. 1) Posted: Tue Oct 28, 2003 5:33 pm
Post subject: speedo calibration
Archived from groups: alt>autos>gm>olds-cutlass (more info?)
I have a 1986 Olds Cutlass with stock 14 inch rallyes w/ 205/70R14's on each
wheel. I'm going to put 15x7 Cragars with 255/60R-15's on the back and
235/60R-15's on the front. Is there any easy way i can recallibrate the
speedo? I'm thinking that my odometer will show less miles than i've actually
traveled too. I have the factory rallye pack gauges, Y vin code 307 V8 engine,
and TH200-4R transmission.

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rcktpwrd

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Since: Sep 19, 2003
Posts: 5



(Msg. 2) Posted: Tue Oct 28, 2003 11:08 pm
Post subject: Re: speedo calibration [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
you need to change the speedo drive gears in the transmission. A GM dealer
should be able to help you find the correct combination of gears to correct
the speedo for any tire size or rearend gear change...

cokeandhennessy.DeleteThis@aol.com (CokeAndHennessy) wrote in
news:20031028113339.04713.00000234@mb-m26.aol.com:

 > I have a 1986 Olds Cutlass with stock 14 inch rallyes w/ 205/70R14's
 > on each wheel. I'm going to put 15x7 Cragars with 255/60R-15's on the
 > back and 235/60R-15's on the front. Is there any easy way i can
 > recallibrate the speedo? I'm thinking that my odometer will show less
 > miles than i've actually traveled too. I have the factory rallye pack
 > gauges, Y vin code 307 V8 engine, and TH200-4R transmission.
 ><!-- ~MESSAGE_AFTER~ -->

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