Stock Front & Rear posi???
 

Hi I have a 2002 blazer 4wd Whenever i punch it both rear tires engage... also when in 4wd all 4 tires always grip. Did GM make sum blazers with stock front and rear posi or limited slips??? My friend has a 96 blazer and his don't lock up both or all 4 like mine, I was thinking maybe sum kind of option that original owner got with it?? Any sugestions?? Thanks!!!!

RE: Stock Front & Rear posi???
 

Do a quick search for G80, that'll tell you how to find out what you've got in the rear. No type of factory locker or LSD up front, though.

RE: Stock Front & Rear posi???
 

Do you have AutoTrac 4wd?

RE: Stock Front & Rear posi???
 

Don't know heard of AutoTrac from someone before. How would I know ?? Can I bring it up by my Vin# to see what I have somewhere??

RE: Stock Front & Rear posi???
 

You would have the Auto 4wd option on your 4wd switch. Non-autotrac blazers got 2Hi, 4Hi, 4Lo.

RE: Stock Front & Rear posi???
 

Yeah, guess not just got 2hi, 4hi, 4lo options. Thanks!!

RE: Stock Front & Rear posi???
 

The front differential is a standard open diff. There is no locker or even a limited slip made for these as the aluminum housing is not all that strong and it takes a ton of work to get to the diff (ie. removing the whole front axle assembly and splitting it in half).

The Gov-Loc (RPO code G80) differential was an optional rear diff. It acts as a standard open differential at speeds above ~30MPH, but has a governor inside that locks the wheels together if it senses an RPM differnce of 100-200RPM (IIRC) between the left and right wheels (below 30MPH as mentioned earlier). This diff has its limitations and inherent weaknesses, but for normal on-road conditions, it is a good compromise between an all out locker and an open diff.

RE: Stock Front & Rear posi???
 

Thanks!!