Question about 1989 Jeep Cherokee
Was working fine then the other day it wouldnt shift untill the engine reached 4500 rpms. doesnt slip or overheat. changed fluid and filter pan was clean and fluid looked good tried adjusting kickdown cable with no results. Actually un hooked the kickdown and drove it, It still shifted late and would still downshift when I stepped on accelarater. This makes no sense to me. any suggestions would be apreciated
I have 1989 jeep cherokee auto wjen put in drive it starts out in 4th gear and goes slow until it builds up speed
Posted on Oct 13, 2010
Discovered a service bulletin on my Jeep on "Alldata.com", which indicated "A/T - Throttle Position Sensor".I don't subscribe to the site, so I could only see this header. I thendid a search on Throttle Position Sensor and found a number of sitesthat described numerous transmission problems attributed to this sensor.I tookthe Jeep to a Chrysler dealer near me, and purchased the part for$69.00. I installed it myself, and the Jeep shifts beautifully, betterthan when I bought it.
A. The TSB you are refering to is number ATRATB324A, dated 1/1/1996 witrh the subject "A/T - AW4 Throttle Position Sensor (TP)".
TheTransmission Control Unit does, indeed, use an input, among others,from the TPS to determine shift times. So if there is a problem withthe TPS, it will effect transmission shifting. In fact, it is not allthat uncommon to see a TPS cause a transmission problem.
If the transmission works fine after the TPS is replaced then I would only recommend thata routine flush be done to it and perhaps treat it to a new filter.
Posted on May 30, 2009
Is there a vaccum hose on the tranny or is there a missing hose where there should be one?
Honestly, I am almost positive it is your torque converter clutch circuit. This is the shifting mechanism for automatic trannys
Posted on Mar 04, 2009
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