i am starting to install a 6 in super lift kit on my 2002 zr2 blazer. i am still waiting on parts. i would like to know if any one knows what is diferent beween the stock rear drive shaft and the very expentive one super lift says that you need for the auto 4x4 s 10

 

it say in the notes
# Models with Autotrac require replacement rear driveshaft, shown in options.
So if you dont have autotrac you shouldnt need it. I think autotrac was only in the bravadas though

 

Smarttrak was the Bravada designation. I am not sure what the designation is for the NV236 transfer case s-series trucks like what I believe the OP has.

 

i thought "Autotrac" was the proper name for the 4 button 4WD system in the Chev's?

also, Neal, if you require a longer DS because of the lift (which is what i'm guessing SuperLift is suggesting it for), why not just hit a local driveline shop with the measurement for the new tube? it's gonna be waaaaay cheaper, and should be done the next day (unless they're really busy).

 

^Yeah, I thought Autotrac was the option offered (as of some point in the +98s) where if you had wheel slippage that 4WD would automatically kick in?

 

auto trac is a four button system on some blazers, when engaged it alowes the frount end to engage when the rear end spins. i dont know if the drive lline needs to be longer or if there is a c/v joint added or what.super lift does not show a picture or discription as to what the diferance is and as you noted i can have one build one cheaper, i knew what the diferance is