Ok I decided to change my 3.55 rear gears to 4.10. The question is where do I go to have this done?

 

Any local tranny or differential shop (like a 4x4 superstore) should be able to do it.

 

Probably looking at $500-600 total for the gears, install kit, and labor. Then your speedo and associated readings are not going to be correct. If you have a 1998 or older probably just a speedometer gear change in the tranny. Newer and I believe you will need an electronic recalibration device, another $125.

Gets expensive.....