1990 4.0 will not shift
#1
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Model: Cherokee
1990 4.0 will not shift
my 1990 cherokee will not shift unless i unplug the box under passenger side of dah then i can shift manually please help!!!!!!!! i also tried another box on it and it did the same thing
Last edited by daleroth9; 11-09-2010 at 05:21 PM.
#3
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Year: 1995
Model: Cherokee
Engine: 4.0L
my 2 cents
first Hi!; that "box" controls the way the trany will shift by sending signals to the solenoids inside the transmision. If you unplugged the "box" and u can drive by shifting manually without problems then u may have a bad "box" or one or more faulty solenoids, and if u try another "box" and it keeps doing the same it can be the solenoids.
#4
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Year: 1990
Model: Cherokee
Engine: 4.0
i had the same problem with my 1990 4dr, replace the throttle position sensor. its the problem 99% of the time and they only cost around 30 bucks new or 10 at the jy.
#5
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Year: 1990
Model: Cherokee
Engine: 4 liter
yea I have a similar problem with my 90, Except i dont touch the box but if i dont shift manually The transmission shifts way to early, been a while since I've driven her but I believe she shifts to early like 1st, 2nd,.. nearly instantaneously and then in top gear at about 35 mph. I dont know if there similar. I havent discovered why mine does it but could be similar.
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