Super Duty Axle Swap

[79jasper]

Obviously that's not the actual photo. But did the axle still have the tag on it?
Edit: I went back and saw it. Get a pic of the tag.
Sent from my SAMSUNG-SM-G935A using Tapatalk

 

[pastorjeep]

3 73 with no L it is the open way the SD open diff looks. You evidently have to split the case open and weld the spiders and set them back in!

 

[IDIoit]

when i opened up my 10.5, the other side had a little bigger opening..

 

[pastorjeep]

Not mine

 

[Black dawg]

Great info as always. On the welded diff, it really seems from all I have read that the driving experience between welded and lock right is about the same.

The difference is that a locker can unlock under light to no throttle conditions to allow different wheel speeds, like sharp turns, but as soon as you put power to it, it locks. I have probably put 50k plus on a welded rear....never ever again.

auto lockers have downsides to, but most all can be covered up by a decent driver.

 

[pastorjeep]

Ok, she is in!

 

[pastorjeep]

Check out the awesome mudders I got for it!

 

[pastorjeep]

Now I have to put in the U-Joint straps, pick up the tires tomorrow, and adjust the E-Brake (thanks to the awesome idea I stole from bike-maker) and she is ready for a maiden voyage. The only concern I have right now is the lack of free play in the driveshaft slip joint. I only have about an inch at each joint of the two piece shaft.

 

[bike-maker]

Glad to help. On mine, I also had about an inch of free play on the slip joint (after move my the axle 1" back - still need to rectify that). And it seems backwards, but the tightest the joint got was as full droop - when the rear axle extends toward the ground, the increasing arch of the leaf springs pushes the axle forward.
So hook that tractor to the ass end of your truck, pick the rear tires up off the ground, and if you still have travel left in the slip yoke, you should be golden.

 

[laserjock]

Check out the awesome mudders I got for it!

Ready for the burnout contest now!

 

[pastorjeep]

Bike-Maker I noticed the same effect when lifted. With tires mounted and and an hour of driving there is a definite difference. I used to think the converter was going in the trans because of how much rpm it took to get going...not anymore! I get the feeling my 21mpg is probably done though.

 

[pastorjeep]

I need a little feedback Bike-Maker after a couple thousand miles I def have some weird/quirky steering characteristics going on. The steering feels light and twitchy after the swap. The rear is a about 4 inches wider than the front and the wheels are early SD with a lot of offset. Did you get any strange steering? Can the wider rear make the front feel light or squirrelly?

 

[Mikey89014]

Did you have to change the bolt pattern?

 

[pastorjeep]

it is the 8x170mm

 

[riotwarrior]

If rear axle track is wider than front yes it will change handling dramatically ...