1989 cherokee wont shift
#1
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Location: Pharr, Texas
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Year: 1989
Model: Cherokee
Engine: 4.0L
1989 cherokee wont shift
I just got a 1989 jeep cherokee laredo everything was working fine till I washed the motor, now it shifts at 4100rpm. what can I check? Is the transmission electrical or vacum power??
#3
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Year: 1989
Model: Cherokee
Engine: 4.0L
TPS
Is that for only newer Cherokees? Mine is a 1989, does it still use the TPS to shift the gears? It has a button on the inside that says Power/Comfort. Do you think the switch is stuck on? Heard this button controls the way the transmission shifts? Can I check the TPS?
#4
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Year: 89
Model: Cherokee
Engine: 4.0
The switch inside is for when the transmission shifts,but when in power mode it will only shift slightly higher than comfort mode. That switch is good for getting up to speed quicker,passing,etc.
The tps is on the right side of the throttle body as you look at it,the iac is on the left,I am positive nit is your tps.
To check it turn your key on and with a multi meter check the voltage from wot to closed,it should be approx 0 to 4.5 volts.if it is not it is bad.
You can also go to the jy and get one for cheap and change it,then buy a new one if you want.
The tps is on the right side of the throttle body as you look at it,the iac is on the left,I am positive nit is your tps.
To check it turn your key on and with a multi meter check the voltage from wot to closed,it should be approx 0 to 4.5 volts.if it is not it is bad.
You can also go to the jy and get one for cheap and change it,then buy a new one if you want.
#5
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Year: 1993
Model: Grand Cherokee
Engine: 4.0
It may be the tcu ( transmission control unit ). My 88 went out last year after washing the motor down. It is under the glove box screwed to the bottom part of the dash board. Unplug it and shift your jeep manually if shifts ok by manually shifting it replace the tcu.
#6
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Year: 1989
Model: Cherokee
Engine: 4.0L
Jeep shifting again (TPS)
My transmission is shifting again. It was the TPS. I almost spent $400 on a rebuit transmission. Checked it with a multimeter and found it was difective. Thanks you saved me a lot of money.
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