Went from a stock tire size to a 285-35/18 in the rear. I want to change the gearing to get back some of the grunt that I lost and maby even gain a bit. Looking at a 3.73. Would a 4.10 be too much? Right now I cruise at 1300 rpm's at 60 MPH. It's just a 9 bolt but I would add a locker of somekind wile I was in there and get rid of the factory limited slip carrier. Thank's

 

if you want an answer from those that have an answer, post your specs, engine stock/modified/or built... type of tranny, any mods done to it... ? regardless of the info I don't have an answer, but when those that would have an answer they'll appreciate the added info you provide them with...

 

With the 9-bolt rear your options are few. Gear ratios are 3:45, 3:70 amd a possible 3:73. Also forget about a locker, reason none are available. My opinion would be to leave everything alone or go the 12-bolt or Ford 9" route.

 

Or...swap in a 10 bolt that already has gears and a posi...

If you buy everything bolt in, you can get a 9" for about 1300 bucks, but have to upgrade to disc brakes, plus the cost of a locker+gear installation cost. $2000? For an almost stock car?

 

It's pretty close to stock and I do not need the strength of a 9" or a 12 bolt. I will have to look around to see what gears I can find.

 

Additional advice: NO 10-bolt rear axle PARTS will interchange with your 9-bolt rear. Again NOTHING.....

 

LOL, thank's man. I will see what I can find for a 9 bolt. If I don't like what I find I will look into a 4th gen rear end swap.