Hi Alex W, chevy k1500 A/T box? 4L80? sure 4wd,
get it checked out in a real shop?
we can not do the checks here, nor hear it
we would use and electronics, stethoscope to find
it zero risk to human body.
not told you, will it grind, parked , and makes noise
in all PRNDL selections, 2H mode.
or shift to 4wd
neutral does it make noise"
my guess is only moving it makes noise!?
if yes tests can be dangerous to the tech and others.
is transfer case
NP208 transfer case?
see this N here/
we can shift to N to see of noise ends.
a loose chain in the box below can make noise for sure using 4wd on dry pavement.
NI is for towing mode, see in the users guide. yours.
i have a very similar if not the same problem. when in 4hi and above 20 i get a growl/grinding noise. i am certin it is coming from the front end but other then that im not sure what it is. does the front transfer case gets its fluid from the tranny or is that somthing i need to check. it almost seems like the 4wd is not fully enguaged or is stuck in 4lo. there is 0 problem when in 2wd and 4 lo seems to operate normaly.
my 1993 chevy k1500 4wd when I am driving down the road it makes a popping and grinding sound from the transfer case and sometimes when im driving it the 4wd shifter shifts into neutral by itself how do I fix my problem
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