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AW4 shifting issues
- Thread starter XJ_Dreams
- Start date
- Location
- Coshocton, OH
Check the TV Cable on top of the moter to make sure it's not misadjusted. If it's set to tight it will cause the symptems you just decribed.
http://www.naxja.org/forum/showpost.php?p=382127&postcount=3
http://www.naxja.org/forum/showpost.php?p=382127&postcount=3
lawsoncl
NAXJA Forum User
- Location
- North Idaho
The throttle cable, if misadjusted can cause sluggish or harsh shifting. It does not control the rpms that the trans computer shifts at. Your problem is most likely a bad TPS (throttle position sensor).
- Location
- MilkyWay Galaxy
6,500 rpm to shift! :shocked: :eyes: Gezz! :explosion
Most likely suspect is the TPS. They do wear out.
Most likely suspect is the TPS. They do wear out.
XJ_Dreams said:
trucksgottaheXJ
NAXJA Forum User
- Location
- Portsmouth, NH
Xj's rev to 6500? Did you do the S2000 mod or what?
JNickel101
NAXJA Forum User
- Location
- Alamogordo, NM
Thought XJs redlined at like 5500...lucky you dont blow your engine...
- Location
- MilkyWay Galaxy
XJ_Dreams said:
Well, now theres a HUGE CLUE!!!!! :laugh3:
I think the TCU reads engine RPM off the same cable, or line. The TCU electronicly shifts the tranny based on engine RPM and the TPS location (rate of acceleration). Fix the speedometer problem and it should fix the tranny shifting problem in your case.
lawsoncl
NAXJA Forum User
- Location
- North Idaho
The TCU has it's own rear output speed sensor - at least on the 4wd. I haven't looked at a 2wd or the FSM to see if the sensor is shared with the speedo, but I don't think it is. Of course, it may be possible that a wiring harness got munched and took out a couple of things at once.
rookie74301
NAXJA Forum User
- Location
- thetford, uk
Hi,can anu body help me, would the tps stop the auto box from kicking down gears as when i get in to top gear and floor the throtle nothing happens just a low rev and a slow pick up, also it seams to go up the box quick, flushed box ,new atp4.
97 xj 4.0 auto
97 xj 4.0 auto
lawsoncl
NAXJA Forum User
- Location
- North Idaho
rookie74301 said:
Yup. Those are the exact symptoms of a bad TPS.
- Location
- MilkyWay Galaxy
lawsoncl said:
I may be thinking of the cruise control speed sensor on the speedometer cable on my 87 Wagoneer?
I still think they are likely to be related problems.