Welcome, I'm Chris (aka Moose) I'm an independent contractor here at Just Answer.
To find the axle ratio you do that through the label in the door jam, see the link below.
If you like fuel mileage and tad less power you want a ratio in the low to mid 3.XX range. If fuel mileage is not that important and you want more power, anything in the 4.XX range. The fuel economy and power is not that much different, very minimal unless alot of interstate driving is done. Average is the 3.55 or 3.73 or 4.10
12-18 MPG is the average fuel economy.
0-30 MPH empty 13-15 Loaded 11-13
30-55 MPH empty 15-18 Loaded 12-15
55-70 MPH empty 14-16 Loaded 11-14
When you ask what kind of service to expect can you go into more detail?
Thanks for asking your question and letting me try to help you.
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