bought this 98 blazer about a month ago ($1000) was a basket case, we got snow today and i figured id give it a test before i took my plow truck out, it failed 4x4 engages fine but the pass side axel sounds like it grinds alittle then makes a poping banging sound, sounds really bad. am i looking at a new axel? makes no such noise in 2wd at all. it makes the sound in 4hi going straight or turned.. it has new upper/lower balljoints new inner/outer tierods and new bearings and shocks

 

check your cv joints
I just climed under mine and there bad
I am haveing the same problem they make all kind of noise in 4x4 and there fine wile there in 2wd
most likely because there not broke and under a load
There just not happy

 

check your hub bearing to. mine started to go out on me after using 4wd for the first time in a yr

 

my hubs are new along with the rest of the front end, i figured cv axels esty confirmed what i thought thanks, for the low cost im gonna just replace both axels up front and hope for the best

 

I just got 2 axles for $45.00 + tax $97. something
from a local place rock auto was asking 47+ shipping=120. and pep boys was 49
happy hunting

 

got the exact same thing yet I replaced entire front end to no avail. tiem for tranny shop?

 

My friends blazed was doing something dif. then mine it was banging and grinding his axles were fine hubs new but the front diff was empty I pulled the plug and got less then a cup out of it and part of that was water we filled the diff up with gear oild and it is fine axle seals need to be done but its not making any noise and works great

 

esty is right i checked my front axel a while back and it was very low, i topped it off and it has been working perfectly ever since, now i just got check some vac lines i think the front is staying partially engaged