Brad57

i was wondering if u could get lightning (lsd 4:10) diff to fit in a regular f150 with an aod e trans do u need a different driveshaft also does anyone know how to read the rear diff tag to tell wat the ratio is

Just call me Sean

iTrader: (1)

It will go in just fine. You won't need a different driveshaft unless your truck has a different pinion flange, but you can swap your pinion flange on. The gear ratio should be stamped on the tag but I have seen them as 2 digits (4.10= 4.1).

heavy-chevy

why not just put aftermarket 4:10s in your diff?

Just call me Sean

iTrader: (1)

Are you offering to install the gears for him for free? It's easier to swap the rear end.

cole_ford

And if hes lucky cheaper.

heavy-chevy

a gear swap isn't really that hard, i would rather do that then change the whole axle out. plus while your in there you can throw a lunch box locker in, assuming you have an open diff.

Eagle Kammback

but who wants a locker in a street truck
a standard positive traction unit is better for the street

Just call me Sean

iTrader: (1)

What the hell are you talking about? You have to remove the rear to put in new gears, so why not just swap in a different one.

Sure, putting in the gears isn't hard but if you don't set them right you will be under the truck changing them again soon.

heavy-chevy

since when do you have to take the axle out to do a gear swap? i would prefer a Detroit style locker even for the street, but i guess if you like it a bit more tame posis are cool too.

Just call me Sean

iTrader: (1)

Ok, if you're a mechanic and have access to a lift then you can leave the rear end in, but if you're like me you aren't going to lay on your back for hours installing gears.