loud grinding noise

[chevyforlife]

i have a 92 s10 blazer 4x4 "w" vin. It is push button and has a 4.3 with auto.
I jumped in my truck after my mother had returned in it to find out she had drove it in 4 lo on asphalt. now when making sharp turns or shortly after i hear a loud grinding noise and feel a shudder. then it quits. it also does it on wet roads if the tires start to spin. this occurs while in 2 wd or 4 wd also so i dont believe the 4x4 is failing to disengage. any help would be great.

[vtmecheng]

Sounds like the CV joints were strained to the point of failure when your mother drove it in 4X4 on asphalt. Sorry to hear that man.
Mini lesson about 4X4:
Because the 4X4 in S10’s lock the front and rear drive shafts together the front and rear drive wheals are forced to turn at the same rpm. This becomes a problem when turning because the wheels will follow different diameter turning circles, requiring different tire rpm’s. Something has to give in order to allow for the turn in 4X4 and most companies chose the tires, assuming 4X4 will only be used in low traction situations. If the tires can’t slip easily a lot of torque is applied to the drive components, wearing them out very quickly. The two most common wear parts on an S10 due to this abuse are the CV joints and chain in the transfer case, the front wheels’ power is applied by a chain in the transfer case. It is because of all of this that chevy installed an “automatic 4X4” option on their push button systems. In this mode the front diff is only connected when wheel spin occurs at the rear wheels. This is not perfect and may get you stuck in mud or deep snow due to the slow system reaction time. Happy 4 wheelin’ and remember to tread lightly.

[chevyforlife]

thanx. cvs was my first assumption, but now with a second opinion, its time to get to work and fix something. do you thank finding some in a scrap yard would be worth the time or buy reman.
Quote "Long gone are the days of straight axles and lockouts,give me convience over reliability anyday"

[Mikado14]

Originally Posted by chevyforlife

thanx. cvs was my first assumption, but now with a second opinion, its time to get to work and fix something. do you thank finding some in a scrap yard would be worth the time or buy reman.
Quote "Long gone are the days of straight axles and lockouts,give me convience over reliability anyday"

My advice is to go with new on a half axle. You may be getting someone else's problem. They usually are not that expensive but have a high core charge, which you will have back provided your ends (spined and diff side) are good.

[vtmecheng]

I agree with Mikado14. It isn't an easy replacment so expect to spend some good quality time on it.