hey guys I was wondering wjeres the best place to finr a set od 3.73's for the rear I found a guy on here willing to sell me his out of his fx4 what yall think? and does anyone have a write up on a gear installation

 

If you are going to go through the hassle of a gear swap, definitly do 4.10s.

 

x2..

unless u have large tires go with 4.56 or 4.88's

 

im only running 275/65/18's and everytime i drive our work trucks it's night and day compared to mine same truck just diff gears

 

then go with 4.10's u wont regret it.

 

do 4.10's because with your little lift your doing im sure you willl some day want a little bigger tire

 

what will the difference be highway wise

 

I was just wondering on a write up I can get these gears used out of a fx4 for 50 bucks

 

don't do it. the 3.73 change is not worth the effort/money you'll spend to change out gears. get 4.10 or 4.30 gears. It'll make your truck a different beast
about 200-300 rpm max...so you should still be under 2000 rpm at 65 mph

 

thanks for the help guys! you mean 200-300 rpm max more? sorry long day lil slow

where can i look upwhat all is excatly in my rear end? or where can i reference my diffs id tag?

 

I'm about 1600-1700 rpm at 65 mph with my 3.73 gears

I'm thinking you will be 1900-2000 rpm with 4.10 gears

 

If you have never really played with rear ends, or unless you have a buddy or two that is a mechanic (who knows what he is doing) that can help you, dont do the install youself.

Its not so much installing them, but setting them up.

 

X2!

 

Does the 200-300rpm take much from the mpg?

 

Here are two links the first one I explain what is on the id tag. And the second one is a write up on the gears themselves.


Id tag

Gear Write
up

Hope this helps.