Diff. Swap Full Time 4X4

[sta500666]

I have an '86 K5 and I just blew out the spider gears in the rear 10-bolt for the second time... My buddy has two trucks I can use to upgrade to 8 lug, I forget the years but one has the semi-float corporate 14 and the other is full time 4X4 with a full float corporate 14. I plan on switching both the front and rear differentials.

So my question is if I deside to go with the heavier differentials from the Full Time 4X4 truck seeing as my blazer doesn't have a Full time 4X4 transfercase, what Problems am I going to run into??? Will I even beable to use the front differential, or will I have to change the hubs to mannual lock or something?

 

[MattK]

That's the only issue I can think of, the hubs. The fulltime front axle is going to have drive flanges in it. If it's a 10 bolt or d44, a brand new set of hubs are only like $100 last I checked. You can probably get a used set for next to nothing if you poke around on the boards.

Be aware of the differences in ujoints as well. The rear will for sure need a conversion joint(1350-s44 i believe) and the front might need one as well. If it's from a fulltime truck the axle probably has a yoke for a 1310 joint. Your stock front might also be the s44 size.

Hope that helps.

 

[Hogback Fabrication]

You don't have to replace the drive flanges if you don't want to. They work just fine, it's just like leaving the hubs locked in all the time.

 

[sta500666]

Thanks! I knew about the conversion joint.

 

[divorced]

I'm thinkin that you can use your current lockouts in your new axle.

 

[sta500666]

I have factory autolocking hubs, I might just switch to mannual.

 

[divorced]

I would. The auto hubs seem to never work when you need them to