wow no year car, that be hard to get accurate help no?
GEO"s run 1989 to 1998 and then became Chevy trackers later.
my guess #2 you didnt read the operators guide need one , have it ask.
nor #3 that its part time 4 wheel drive not full time
full time happened in 2004 only
the 1989 to 1989 are all the same. and beyond to 2003.
first off its best to shift in to 4wd from 2h going as slow as possible
0 mph can fail to allow shifting the transfer case is not a 4wd syncro-mesh gear (ive rebuilt them) .
what that means is move very slow and shift never fast or grind that poor little gear to *****.
Part time 4wd is only for offroad
and for ICE/snow packed road,
never for pavement, tires touching concrete or tarmac, no, do not.
the rule is 1 tire needs to be on ice or dirt, or more tires
ok now you know PT 4wd. like a champ, (or queen)
it does not give more power, only more traction, on snow/ice
Im guessing you a girl and car is on pavement only., see>?????
if im wrong tell me... cant see you, nor your car nor what car is rolling on,, nor your country. (state)
GOT ICE? we are hot down here in Texas. heaters off. hot.
now lets do front axles.
if the left fails or the right auto locks fail then
there is no 4wd, period !!!
sorry but that is a fact.
the autolocks ive seen were all bad, never ever seen say
an 1991 auto that works (long ago rusted to stuck off or stuck on)
the manual locks i like, because, they can be repaired easy
the autos can not be. (complex answer, skippped)
testing the autos is hard but on ice easy
if the tires spin up front you have a good lockup there.
forced to do that.... need videos of that , easy. ask.
btw the GEO name is just a badge (from GM)
its really a: SUZUKI
vitara world wide or sidekick usa
open hood, look up, see that sticker, "SUZUKI"
car was made in CAMI plant in Canada.
PT tests and horrors to avoid.
http://www.fixkick.com/part-time-test.html