I need to get my speedo corrected for my 265/75/16 tires. The PO had some huge meats on the truck and now the speedo is 8-10 mph off. I have been searching and cant seem to find the gear number that I need.
Thanks,
Tony

 

ttttttttttttttttttttttttt

 

am I missing something? what is ttttttt

 

to the top, is usually ttt. It wont let you do that unless its 10 letters or more. So, my finger got stuck.

 

Try this web site.
It will calculate what gear you need, you just need to enter the tire size and rear end gear ratio.
http://www.juric.org/mopar/tools/transgear.php

 

It's been quite a long time since I last made one of these but I **think** a 3:54 rear end uses a 31 tooth gear - it's either that one or a 29. I recall it should be green in color. When you change the gear, just remove the bolt that holds the adapter to the T-case and pull straight out without twisting (O-ring can get cut when twisting the part).

 

Thanks guys!

 

I'm pretty sure with the 31" tires (265X75X16) it takes the 31.