El Capitan

So when i bought my tuner, I didn't have the 300+ hours of research into the diesel engine and supporting components that I do now. The realization that my trans was now making the truck drive like a bucking bronco, sort of made me panic buy and install the tuner I have. I did do some.comparison before I bought it, but what I didn't know, was that it's absolutely a world of difference between the 2. Is there a specific model I should look at getting?

I dont have a live data tool. When it was in the trans shop for its first fluid change/spot check, it was hooked up to a live data scanner to monitor the trans and possible issues. Trans Guy said "probably electrical" I will check em out. Actually makes alot of sense. Thank you.

There is one connection I'm wary of. The 150 amp breaker, goes through the plastic housing of the device, into steel. Would the plastic act as a barrier of some sort? Electrically inclined, I am not. That's my question. How doninteat that? I dont have a live data tool. When it was in the trans shop for its first fluid change/spot check, it was hooked up to a live data scanner to monitor the trans and possible issues. Trans Guy said "probably electrical"

I've done that. Seems to make 0 difference. Even at 65mph however, i can hear/feel the slight hesitancy. No blatant rpm drop or surge. Also, no codes and i have run that diagnosis quite frequently. Never had any codes.

I have a 317k mile truck that only sometimes, runs poorly in the lower gears. 11k miles ago, the original trans gave up the ghost. A friend of mine built a trans with a triple disc Suncoast converter. Immediately the thing drove like crap. Stock truck, no mods, 2400rpm just to 2nd gear and BANG! shifted up into 3rd. And same into od. There's honestly no way to make this long story short. This last Thanksgiving, I spent it under the hood, doing the w-t ground mod and apps reset. So after it was done, I took it for a test run. Upon startup, idiot light indicated batts=no charge. Stopped at the store 2 miles down the road realizing I never set the 150 amp breaker. Flipped it on, and idiot light went out. Figured huh! I must have done it correctly. Truck ran great. Thought I'd fixed it. After a week or so, problem came back. Ok.... researching showed the ripple test. Yep! Had some number way over the acceptable tolerance, and so, replaced the alternator with a stock reman. Again, apps reset. Fixed it for a few days. Ok time to get the initial fresh build, trans fluid changed. Brought it to a reputable shop, who told me that the idiot who installed it initially, never adjusted the av cable. When I picked it up from the shop, it drove better than it ever had. I was beaming!! Shifted quickly, and solid without the huge slam! So, although it shifts better, I felt something else going on. Although It shifts fine 1-2, 2-3 but sometimes in 3rd, between 30-35 mph (driving like a fuel consumption worry wart) surges and bucks it's way to OD. If I consistently drive like an A-hole, it shifts the way I imagine it's supposed to. Like butter. It's tough to get a good reading on this alternator and it's very possible I don't know how to use a DMM. I'm a builder not a electrical guy by any means. And I feel like its an electrical issue. My fuel pressure is at 14psi last i checked. And the intermittent issue is a constant when its wet condition driving. Any thoughts anyone? This is my first post. Thank you for all the help I've received through lurker mode!

Vehicle Nickname: Andrew capitan Date Added To The Garage: 2022-12-07 Garage Link: Andrew capitan