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Technical Info: 2nd Gen 24 VALVE DRIVETRAIN Technical discussion of second generation (1998 - 2002) 24-valve engine and drivetrain questions, solutions and upgrades.
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Old 06-20-2017
BlueThunder BlueThunder is offline
Join Date: Nov 2005
Location: Granby, CT
Posts: 31

In my case, it definitely was the apps. Worked perfectly for the 4 months up until I traded it in for a loaded '11 hemi.
'99 2500 Sport, Ex Cab, Short Bed, Intense Blue. Loaded, Leather. FASS, Banks 4" turbo back, High Ram, waste gate. AFE, Injectors, Shift Kit, AR rims, Bed Rails, Lund Steps, 3" lift, Tints, Flares, ISSPro FP MP Pyro, Blue chips controller. Hotrod vp44
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Old 12-03-2019
deej's Avatar
deej deej is offline
Join Date: Apr 2002
Location: Forks, WA
Posts: 91

Hey guys, I know that this thread is almost 2-1/2 years old, but I wanted to give you an update on this issue for me. Eventually the TC lock and unlock came back about 6 months ago with a vengeance! My wife and I moved an hour and a half from my home town, and on the three trips it took to move our stuff, the TC unlocked, and I'm not exaggerating, probably over 1000 times each way. I finally had enough and stopped at Tranco transmissions in Port Angeles, the guy in there had a list of all the things it could be, as in a list of 20 things related to this issue. He said that they had dozens of trucks in over the years and the one thing that fixed 98% if the TC unlock was a simple ground wire added, t-tapped off of the ground that goes to the TPS. It was the easiest and cheapest place to start. Well let me cut to the chase, the problem is GONE!!! In the past three months of driving back and forth the hour and a half, not a single incident of the TC unlocking!

Now all of that being said, about 3 weeks ago, my transmission decided to take a dump and I had to get it completely rebuilt. I'm sure the last 3 or 4000 unlocks didn't help as it was really beating the tranny up pretty hard. So $3500 later with a basically brand new transmission and an upgraded billet TC, and all new electronics, the truck is like brand new. I have owned this truck for 18 years and it has never shifted up and down like this! I even have back pressure going down hill simply by touching the gas pedal. This is crazy! Anyway, just wanted to give an update.
1999 2500 4X4 K&N Filter
2005 Honda ST 1300
2006 Kawasaki KLX 250S Dual Purpose
2006 Yamaha XT 225
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