IN WTB- K truck or Blazer Speedometer Calibration Box

[tim71]

Want to buy the calibration device that screws on to the transfer case which then accepts the speedo cable. The Blazer that I'm rebuilding was missing this device.

[Accelo]

I have one. $50 includes shipping. The ratios are all different. I am assuming you need the box with the gears and don't care about the ratio? Or If you do know your ratio let me know as i have two of them and can provide the box with the closest ratio. I will post pictures if you are interested. Not all transfer-cases needed the converting box. Only if the possible gear ratio was off more than like 3-4% did GM include the box.
I can help you figure out the ratio if needed. I would need the indicated speedometer reading at the real 60mph speed. You can down load an speedometer app for your phone to get the truck to 60mph.

If it's not running you will need the following information;
1-Tire size, or better year the revolutions per mile.
2-Differential ratio
3 gears in the transfer-case that drive the speedometer (driven and drive gears).

[tim71]

Originally Posted by Accelo

I have one. $50 includes shipping. The ratios are all different. I am assuming you need the box with the gears and don't care about the ratio? Or If you do know your ratio let me know as i have two of them and can provide the box with the closest ratio. I will post pictures if you are interested. Not all transfer-cases needed the converting box. Only if the possible gear ratio was off more than like 3-4% did GM include the box.
I can help you figure out the ratio if needed. I would need the indicated speedometer reading at the real 60mph speed. You can down load an speedometer app for your phone to get the truck to 60mph.

If it's not running you will need the following information;
1-Tire size, or better year the revolutions per mile.
2-Differential ratio
3 gears in the transfer-case that drive the speedometer (driven and drive gears).

Sent you a PM

[tim71]

WTB cancelled, no longer in need. Thanks, Tim

[Louisvillekytruck]

Originally Posted by Accelo

I have one. $50 includes shipping. The ratios are all different. I am assuming you need the box with the gears and don't care about the ratio? Or If you do know your ratio let me know as i have two of them and can provide the box with the closest ratio. I will post pictures if you are interested. Not all transfer-cases needed the converting box. Only if the possible gear ratio was off more than like 3-4% did GM include the box.
I can help you figure out the ratio if needed. I would need the indicated speedometer reading at the real 60mph speed. You can down load an speedometer app for your phone to get the truck to 60mph.

If it's not running you will need the following information;
1-Tire size, or better year the revolutions per mile.
2-Differential ratio
3 gears in the transfer-case that drive the speedometer (driven and drive gears).

Great information