speedometer problem

[nerraw117]

Well i have had a big problem on getting my speedometer to work. So I have a 1979 203 transfer case that came from a truck with 3.55 gears. I swapped it in my truck with 90 wiring and a electric speedometer. So I went and got a 4 pulse VSS to plug into my transfer case. It works now! BUT when I go about 45 it reads 30. It reads 10-15 mph off through all the speed, a tad bit more through the faster speeds.

would it be easier to take it to a shop and see if they can fix it by a gear in my transfer case and how much does that normally cost?

or should i buy this and would this work? http://www.dakotadigital.com/index....tegory_id=287/home_id=59/mode=prod/prd126.htm btw i dont have drac or a buffer or anything just a aftermarket 4 pulse VSS

 

[nerraw117]

bump

 

[Thunder]

You prolly just need the right speedo gear. You can take it to a shop. Or go here :http://www.tciauto.com/tech_info/speedo_gears.htm Use their calculators and get the gear from them.. Easy install.