What speedometer tooth count do I need?

[josephh07]

I have a 2001 Tj Sport Auto trans 4.0L with 35 tires and i don’t know what speedometer tooth to put on. one of my buddies told me to put a 3.73 gears but it still bogs up a hill at high way speed. What gears should i get. I have dana 30/35 axles. @Jerry Bransford

 

[Claytone]

Differential gears and speedometer driven gears are 2 different things/questions.
Do some google box searching for Grimm Jeepers calculator and you’ll find all the diff gearing info you can digest.
Speedometer gear charts are out there too, your choice of diff gearing and tire size will determine that.

 

[ErikOffroad]

https://wranglertjforum.com/threads...ometer-after-changing-tire-sizes-or-gears.83/We got a chart