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Interference in the throttle position sensor circuits (APPS) on Dodge Cummins engines from 1994 to 2004 will create false voltage readings in the APPS circuit and cause the lock-up torque converter to rapidly cycle on and off as you drive. This quick and easy fix removes the annoying and potentially harmful RF interference.
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I don't give ANY product a quick review unless I test it first. I purchased the APPS Noise Isolator exactly one month ago. The installation was a breeze. But better than that.. it WORKS! Yea! Seven years ago I purchased a 180amp Alternator which is beefier than the one which came on my 1999 Dodge RAM 2500 5.9L Diesel. A week or so later my APPS started acting up. Between 37 MPH and 50 MPH the tranny would shift in and out of gear. Drove me crazy and I had also put in a NEW BILLET Transmission so I knew it had to be the APPS (Accelerator Pedal Position Sensor that Dodge calls the TPS). I spent over $400 and bought a new one including the bracket. Of course I pulled the NEGATIVE cables prior to installation. The old one had a sticker at 0.52 volts so I set the new one the same and calibrated it via the pedal. After 3 or 4 days the same problem happened. Long story short, I've gone through 3 different APPS modules and have been fighting this darn problem for 7 years. However, about a month ago I saw a video on YouTube and Thoroughbred Diesel explained how the wire from the APPS ran close to the Alternator which was the cause of the problem! They recommended BD and I also viewed their video(s). I immediately ordered and BD shipped fast. Bottom line for me.. I'll ORDER from BD in the future as I now trust them. Service was good. Product is great. What more can you ask? I recommend them.
If your diesel truck is searching for a gear this is the fix
Worked as advertised, I also added more grounding to other points to insure complete chaise ground. I also used dielectric grease at all points of contact, Wire tap and body ground contact areas. Truck shifts and hold converter lock like it did when new What a Big difference.
Worked perfectly!
My tranny was in and out of torque lock up at 40-50 mph. This install fixed it.
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