Speedo adjustment?

[horsepit]

Is there a bolt on adapter to correct my speedometer. I seems about 5 MPH slow now.

1987 Blazer, 350, TH700R4, NP208, 3.42, Rancho 4", 33"

 

[Tatman]

I have the same problem, my speedo shows @42 when I'm doing 55. I've gotten use to it and just figure I'm doing @ 10mph faster than the speedo until I can figure out a way to get mine set. Then if I decide on a larger tire size I'll have to do it all over again.

Brian
<a target="_blank" href=http://www.saddletramps.com/BlazerK5.htm>www.saddletramps.com/BlazerK5.htm</a>

 

[jc71355]

I have been told that the Chevy Dealers have the gears to correct for larger tires but i haven't looked into it.

91K5 350 2.5in Suspension lift 33/12.5

 

[Thunder]

Just change the spedo drive gear.You can get a different gear from the dealer or from a spedo shop. The gear you need to replace is in the x-fer case where the spedo cable attaches to it. It is a easy swap. Just take off the keeper and it comes right out.

<a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

<font color=blue>Nevada... Where the pavement ends and the west begins

 

[jc71355]

How do you know what gear you need to go in there?

91K5 350 2.5in Suspension lift 33/12.5