TCC Lockup issue.
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Grand Champion
Joined: Aug 2009
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From: MAINE
TCC Lockup issue.
i did a highway trip today....(by the way i got 93 miles on less then a 1/4 tank 
) but as i was driving, i had Cruise Control set to 70, it was going fine, then the CC let go, and it was deaccelerating....didnt think much of it, went to get back to speed, and i noticed that my Tach was about 400 rpms to high (was runnning at 2100 rpms at 70, when its usually about 1800 rpms).....then i noticed the Torque converter kept locking, unlocking, locking, unlocking at a steady throttle on flat ground. Now with this happening i dont have CC.....
What wuld cause it to keep locking and unlocking? it got to the point where it wouldnt unlock, and the RPMS were high....but after about 1/2 hour it released and was normal the rest of the trip, and CC was working again
Fluid is perfect level, and looks/smells perfect....(just did a fluid/filter change about 5K ago.)
went to my buddy who owns his own shop, and he said, it could be either the Computer, or a sensor, but he would need to take it for a ride (didnt have time today)......truck shifts perfect, and still goes into O/D, just the lockup is the problem....
any help is appriciated.
) but as i was driving, i had Cruise Control set to 70, it was going fine, then the CC let go, and it was deaccelerating....didnt think much of it, went to get back to speed, and i noticed that my Tach was about 400 rpms to high (was runnning at 2100 rpms at 70, when its usually about 1800 rpms).....then i noticed the Torque converter kept locking, unlocking, locking, unlocking at a steady throttle on flat ground. Now with this happening i dont have CC.....What wuld cause it to keep locking and unlocking? it got to the point where it wouldnt unlock, and the RPMS were high....but after about 1/2 hour it released and was normal the rest of the trip, and CC was working again
Fluid is perfect level, and looks/smells perfect....(just did a fluid/filter change about 5K ago.)
went to my buddy who owns his own shop, and he said, it could be either the Computer, or a sensor, but he would need to take it for a ride (didnt have time today)......truck shifts perfect, and still goes into O/D, just the lockup is the problem....
any help is appriciated.
Last edited by 95RAM360; Apr 11, 2011 at 04:08 PM.
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Grand Champion
Joined: Aug 2009
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From: MAINE
No CEL.....just have code 12 (battery disconnected within 50 key cycles) and Code 32 (EGR gasses not functioning properly....i blocked my egr pipe, and have a hollow cat, which explains that.)
I will check out the TPS....i did notice though that my gas pedal is real loose...is that normal? Like my cable is stretched..........basically it goes like this.....Tip/end of cable, then theres about an inch and a half of cable, then its at the gas pedal.....so the tip doesnt seem like its in place, and i cant push it to place, it comes back out.........hard to understand but i hope you get the idea
I will check out the TPS....i did notice though that my gas pedal is real loose...is that normal? Like my cable is stretched..........basically it goes like this.....Tip/end of cable, then theres about an inch and a half of cable, then its at the gas pedal.....so the tip doesnt seem like its in place, and i cant push it to place, it comes back out.........hard to understand but i hope you get the idea
Last edited by 95RAM360; Apr 11, 2011 at 09:09 PM.
Grand Champion
Joined: Apr 2010
Posts: 5,011
Likes: 6
From: Meeker, CO
You could use a (preferably analog) multimeter to test the thing. If you see noise on the signal pin while moving the throttle from fully closed to wide open slowly, the TPS is a goner. The signal output should change smoothly across the full range of motion of the potentiometer.