Do you know which T5 variant you installed? There are a few different gearing options.
It's an S10 box, Muncie bolt pattern, electronic speedometer that has had the mechanical speedometer tail housing swapped on. I don't remember what tag number it is- I will pop the floor panel off and look one of these days, and write it down in my truck notebook this time. I have it in my head that it's 0.76 overdrive. I'm pretty sure I found that number on one of the T5 info sites, and the math works out on the
Spicer gear ratio calculator site with a known RPM (I have a tach), speed (GPS on phone), and tire size (to two decimal places from the product page on the Discount Tire website). However, I have seen folks say S10s only came in 0.72 and 0.86 overdrive. The math just doesn't work with 0.72 or 0.86.
