Alright its time to upgrade from my pos 3.21 gears to something a little better (9.25 axle). Im thinking 3.73's and I have a few questions about the swap.

Where is a good place to look online? Gearsareus.com looks like a good site to buy from. Now besides the gears what else do I need to buy? if anything? I'll have a local shop install these for me. Any advice or comments would be appreciated. Basically all i want is more low end torque, ive been hauling alot of stuff lately and im sick of my 5th gear having zero power.

 

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I don't believe you'll find any 3:73s for a 9.25. You may find some 3:91s avalible.

 

I bought mine from Gears4less at 1(866)217-0281 and ordered National gears for front and rear with Master install kits and an extra insurance that covers the gears for life and also a new carrier fro the 44f because I went to 4.56's, the price was $560 total. I am going to be running 35's and that will make my RPM 300 more than stock at 60 mph with overdrive off, so I expect to get more towing power. I did those calculations from stock gears and tires, which mine are 3.55's and 245x75/R16. I am now running 33's and my truck has no power. I hope to have a bit more torque than stock setup once everything is installed. My truck is a 99 4x4 with 318 and automatic.

 

Interesting info miata, so they dont make 373's for my size of axle? why is that? i think that 393 would be to drastic.

 

http://www.truckperformance.com/prod...e=0&step=1

 

Here's where I got mygears, install kits and posi unit.

http://www.drivetrainspecialists.com/

What size tires are you running???????

 

265-75-16