pokapotato

1.5 years ago I drove to ATS and had a trans built and installed for the tuck. I can't remember which stage the trans is but it has the deep pan, 5 star TC and billet input with all the standard upgrades. I don't plan on doing any 4wheel launches so it fits my needs pretty well. The issue is that after the second shift while driving, especially with fuel mods turned on it will hunt big time going in and out of lock up at about 35-40 MPH. Now, ATS says this is a fatal flaw of the 47RE and that putting a real torque converter in them tends to amplify this flaw. They said that they did an update grounding a wire going from the tps to the pcm, and I can see the wiring is in place. The issue for me is that it hasn't been up until the last 2000 miles or so that it has been getting really bad. Called ATS and they told me to check the wiring and make sure there were no opens shorts or grounds. Everything looks good to me. Is anyone lese experienceing this and what are your thoughts.

phox_mulder

Check your battery terminals.

This is the leading cause of the hunting issue.
Clean them up and see if it fixes the problem.

If not, then you can start looking at various grounds and alternator connections, one of the other causes.


phox

bbuchanan

I had the same problem on my 01. The fix was to tape up the ground wire behind the alternator with aluminum tape.
Brian

jentas

Definitely sounds like the APPS issue that I had with my truck. It seems like there are a bunch of different things you can try before dropping 4 or 5 hundred for the mopar only part.
Here's what I've done, going from the tips of others on the forums: wire brush and baking soda for the battery terminals and make sure all grounds are metal to metal, wrap the big brown? and black alternator wire with aluminum foil and electrical tape (both already mentioned above), clean the PCM (silver box behind the air box on passenger firewall) connections and the area around the screw holes--add a ground wire from one of those screws to the chassis or neg battery terminal. Then, do the "apps reset". If that doesn't work, your last resort is a new bellcrank/apps sensor, or you can try messing with the voltage by adjusting the torx screws on the apps sensor (there's a write up on how to do it floating around here somewhere).

Good luck,
-John

pokapotato

Wrapped batt neg alternator cable with aluminum foil. No change. Spoke with Clint Cannon with ATS. Says the problem is the JTEC module and that this is typical. Says the fix is one of three. New updated JTEC module (spendy), lockup controller (spendy) or they make a module that connects between the tps and the JTEC (reasonable, $100 dollars give or take a little). Have performed APPS reset. Have not tested yet.

XLR8R

Got the T-shirt for that!

I didn't want to fool with chasing bad grounds or EMI issues, so I just wired in a 3-position switch to control the TC and OD lockup to do what I wanted it to...

TallTom

how many miles do you have on your truck? While changing my oil filter I hit my channel locks on my alternator connection. Shortly after that my truck started the surging and hunting like you are having problems with. I had my alternator rebuilt, they changed my rectifier at the same time as changing the brushes and it fixed my problem. The alternator guy said he thought I burned out a diaode in the rectifier with the channel lock incident. To make a long story short 60 bucks and a rebuilt alternator later my problem was solved.

Good Luck

TallTom