I use to own an 88 Jimmy 4.3L auto with the push button 4x4 equipt with the G80 in the rear and i remember being in the snow and on loose gravel with it. It would spin all 4 everytime, was there a difference in diffs when the truck had the push button 4x4 in it?

 

No. There was never a locking front differential offering in the s-series trucks. Someone could have welded the front spider gears together I suppose, but there were never any locking differentials in the front from the factory.

 

here is a locker for the front. pricey & i dont know if id put it in the aluminum case.....

http://www.central4wd.com/inventoryd...37;folder|5521

 

Yeah, I knew there were lunch box lockers available, I was speaking of the stock offerings. But as you said, I wouldn't put it in an aluminum case.

 

So there is an iron front diff??? I would love to find one of these and replace mine.... just for the heck of it.... Are there any downfalls to the alum ones if you are not a serious offroad guy?

 

No downfalls really to speak of, but a locker would test their strength.

The iron front diff came in some ZR2's and a few lucky 5spd 4wd 2drs.

 

wonder what Logan's has in the front? zedartwo, how about you?

any other ZR owner's care to give up what their's is made of?

 

Logan... if you do the SAS and get rid of the front end... wanna send me your housing??? please??

 

Thats possible, wish i still had the truck to look into it further. I would think if the spiders were welded it would bind and split the case. Sounds like its time for a solid axle conversion. Thanx for the info.

 

So for example lock right in the front would be a bad idea ? I was planning on buying Lockright to get better traction in the front.

Guessing 1996 also has alu diff ?

Would a complete diff for example a e-locker work better since its a complete diff an not just a "lunch box locker " ?

Or is the housing itself thats the problem and not the diff ?