Will a ZR2 S10 truck diff/rear end bolt in my Blazer? I have an opportunity to buy a front diff/rear end with 3.73 gears/G80 for cheap. Would be a nice upgrade from my 3.42s/open diff as I will be running 31s shortly.

 

Yes it will. That's what I have under my Blazer. The only real differences between them is the spring perches on the S10 axle won't have the frame bump stop cups. Not a big deal. The front diff is exactly the same, so it's a direct swap.

 

Awesome thanks. Been driving around on 265/70/16 for a few days and the Blazer isn't as slow as I thought it'd be, but the shorter gears should perk it up. Can't wait.

 

With 3.73s and 31s I could spin my tires all day long if I wanted to! We will see how 5.13s and 37s do now lol!!

 

did you end up buying the axle and diff? What did you pay for the combination? I found a zr2 axle and diff for sale, the axle doesn't have brakes on it. Given everything is in normal condition, what's it all worth?

 

I missed the opportunity...now Im kicking myself in the a$$ because I want a G80 for winter. I was going to buy both front and rear diffs off a rolling chassis for $350.

 

While the G80 can be nice in low traction situations you do have to be careful with it on snowy/icy roads. Because one tire will slip first, then the G80 locks it can have a tendancy to kick you sideways when you're accelerating or when the transmission shifts. This can be a concern with any automatic locker. It's not a big deal if you're aware and careful but it is something that's important to know for winter driving in a RWD vehicle.

 

I agree. I've slowly drifted into a curbs at stop lights in my last truck when AWD went out, but those are the conditions I generally have it in 4wd anyway and its easy to correct when the front has pull. I like the extra grip in wet/slushy conditions more so I don't have to worry about spinning slowly through an intersection and turning 4wd on/off. This is my first 4WD and damn if the surface isn't super slick I feel binding and I don't want to wreck anything.