Original 87 short stepside, 350/4 speed 4X4...tires 31X10.5 stock?

[Greenlee]

Here's a pic of my truck with 31's on 15x8 wheels to give this thread a little more life.

Now I have a question. My speedometer is about 4 to 5 miles per hour off at 60 m.p.h. I figured I was out of luck because I didn't think 31's came stock on these trucks. Can I buy the correct speedo gear to make the speedometer accurate? Seems like there must be one if these tires came stock on the truck.

[Keith Seymore]

Originally Posted by Greenlee

Now I have a question. My speedometer is about 4 to 5 miles per hour off at 60 m.p.h. I figured I was out of luck because I didn't think 31's came stock on these trucks. Can I buy the correct speedo gear to make the speedometer accurate? Seems like there must be one if these tires came stock on the truck.

yes - or, some packages came with an external adapter to correct the speedo (mine did).

You might check into that as well.

https://transmissioncenter.net/?s=speedometer+gears

K

[57NAPCO]

Originally Posted by Greenlee

Here's a pic of my truck with 31's on 15x8 wheels to give this thread a little more life.

Now I have a question. My speedometer is about 4 to 5 miles per hour off at 60 m.p.h. I figured I was out of luck because I didn't think 31's came stock on these trucks. Can I buy the correct speedo gear to make the speedometer accurate? Seems like there must be one if these tires came stock on the truck.

Outstanding looking truck