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Old November 2nd, 2019, 11:38
Tonybeirut Tonybeirut is offline
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Torque converter or aw4 problem?

Hi guys so my aw4 doesn't shift when its cold, it stays in 1st gear until it warms up. I must warm the engine 5 minutes before driving getting it to operating temp otherwise the transmission won't shift normally.

When cruising on highway (around 70 kmph) and when I press the brake pedal the RPM won't jump 500 means the torque converter not working. I even have the rad design shifter with the torque converter manual switch, this one not working as well, the tc not locking / unlocking when I engage it manually.

I have the brake switch problem by the way, my brakes are always on until I sticked a coin on the pedal upper arm to make the brake lights go off.

Any tests that I should do to narrow the problem?

Thanks
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Old November 2nd, 2019, 22:20
lawsoncl lawsoncl is offline
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Re: Torque converter or aw4 problem?

You're either got an issue with the Rad shifter or the wiring, or one or more bad solenoids. Time to dig out your multimeter and start checking resistance of the solenoids.
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Old November 4th, 2019, 02:15
Tonybeirut Tonybeirut is offline
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Re: Torque converter or aw4 problem?

Solenoids of the tcm? Under the dash passenger side or the harness under the hood? How many volts/ohm it should be?
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Old November 4th, 2019, 02:16
Tonybeirut Tonybeirut is offline
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Re: Torque converter or aw4 problem?

Quote:
Originally Posted by lawsoncl View Post
You're either got an issue with the Rad shifter or the wiring, or one or more bad solenoids. Time to dig out your multimeter and start checking resistance of the solenoids.


Solenoids of the tcm? Under the dash passenger side or the harness under the hood? How many volts/ohm it should be?
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Old November 4th, 2019, 06:00
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ehall ehall is offline
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Re: Torque converter or aw4 problem?

Bad TPS will make for funky shifting, may want to try a replacement
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Old November 4th, 2019, 19:43
lawsoncl lawsoncl is offline
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Re: Torque converter or aw4 problem?

Quote:
Originally Posted by ehall View Post
Bad TPS will make for funky shifting, may want to try a replacement

He mentioned a Rad shifter, which would be a manual shifter that would eliminate the TCU or it's sensors. http://www.radesignsproducts.com/win...trol-kits.html


Someone already responded with info on checking the solenoid resistance over on https://www.cherokeeforum.com/f2/199...d-test-254359/
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Old November 5th, 2019, 17:35
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Jeff-97XJ Jeff-97XJ is offline
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Re: Torque converter or aw4 problem?

I would first check that your Fluid isn't too low,
if you haven't done this yet.

Jeff-97XJ
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Old November 5th, 2019, 19:30
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ehall ehall is offline
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Re: Torque converter or aw4 problem?

I remember having this problem with a fresh rebuilt AW4 once, turned out the front two bolts on the valve body were not torqued and vibrated out. When the trans got hot, the valve body would pull away a little and fluid would leak out through the crack instead of driving the circuits. If I kept the trans temp below 190 it worked fine. Pulled the pan later to inspect and found the bolts laying loose.
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