if you can hear your transfer case kick in and your front wheels arnt kickin in theres a electronic actuater in the front end that always goes its ownly like 50-60 bucks
The 2001 Rubicon is FULL time 4x4 from factory. Unless you installed a 2x4/4x4 select then it should always be in 4wheel drive.
2002 ranger wont go in 4wheel
check vaccum lines on differential or by shift linkage
I had a bad transfer case, maybe you have also
modual
you need to check the switchin the caband up under the front by the 4 wheel drive caseing you have a cycl with a cable on it this is elec.on the case this could be bad.
Likely heater core. I had same problem with 1996 S-10 with 4.3L.
To answer your question I need to know the year model of your Chevy Celebrity as well as the engine that it has in it.1996 chevy calavlier 2.2
my 4 wheel drive wont ingage into gear from 2 wheels to 4 wheel drive why?
Bad temperature sending unit? Bad gauge?
Does it turn over? No Fuel? No Spark? No compression? Weak or bad battery?
Frozen/seized clutch pack, time for a rebuild.