4x4 chevy jimmy stuck in 4 whl drv - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-19-2002, 08:35 AM
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Post 4x4 chevy jimmy stuck in 4 whl drv

I have a 1994 4x4 chevy jimmy that seems to be stuck in four wheel drive. I just bought this ride and it was wrecked. I have fixed it, but it is still whining and when it runs for awhile it dumps transmission fluid.. I know that this is not a hotrod...yet.... but I am trying to get it running smoothly enough so I can change out motors. any ideas on what could be the problem here?

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Old 11-19-2002, 11:51 AM
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Bent shift forks? Can you manually shift the transfer case? If the electric motor that does the shifting for you is not connected or working then you've found the problem. Do you have a manual?
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Old 11-19-2002, 01:24 PM
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I believe that GM uses a vacuum shift motor and they are famous for this. There is supposed to be a control module under the battery tray.
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Old 11-19-2002, 02:18 PM
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there is a vaccume switch on top of the transfercase, a vaccume actuator under the battery tray, and a couple of washers in the front axle. any of those could be bad.
my ride is here. i'll explain more when i get home
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Old 11-19-2002, 03:06 PM
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ok, pull the vaccume line off the actuator under the battery, if the 4x4 disengages, the switch ontop of the transfer case is bad.
before you do that, get a mirror, or pull the battery, and tray, check to see if the actuator is ripped, if the actuator is ripped you can't get vaccume from the t/c so you wouldn't get 4wd.
but it doesn't hurt to check.
i'm having a hard time cause my kid won't leave me alone.
so if you pull the line and there is vaccume with the shifter in 2wd the switch is bad.
the actuator under the bat. pulls a cable that works a shift fork, to engage the axle (this replaces automatic hubs) there a couple of thrust washers inside that can fall out of place and bind every thing up.
if the switch works, the actuator is ok, lift the front wheels, disconect the cable from the actuator, if the cable doesn't move freely i would suspect the trouble is in the axle.
if any of this doesn't make sense , i'll try agin.(i fear i'm talking in circles)
do you have a lever or "smash on the dash" 4wd?
check that the front diff is full, these leak like crazy, where is the tranny fluid comming from?

[ November 19, 2002: Message edited by: axle bastard ]</p>
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