2001 2500 Rapid Torque Converter Cycling

[Dynamic]

I really don't see any converter cycling in that video. I'm trying to make heads or tails of it, though to be honest. It looks like you take off from a stop, and at the 1-2 shift, it shifts, but then the tach jumps UP a few hundred rpm, and then back down, then back up a couple of times before continuing to rev up toward 3K. If I had to guess, based on this video, I'd say it was a 1-2-1-2 shuttle shift going on. What governor pressure solenoid is in the transmission? It also seems like a LOT of rpm going on for how fast you're accelerating. Where is your TV cable set? At what rpm is your WOT 1-2 shift point?

[Bfranz]

7 hours ago, Dynamic said:

I really don't see any converter cycling in that video. I'm trying to make heads or tails of it, though to be honest. It looks like you take off from a stop, and at the 1-2 shift, it shifts, but then the tach jumps UP a few hundred rpm, and then back down, then back up a couple of times before continuing to rev up toward 3K. If I had to guess, based on this video, I'd say it was a 1-2-1-2 shuttle shift going on. What governor pressure solenoid is in the transmission? It also seems like a LOT of rpm going on for how fast you're accelerating. Where is your TV cable set? At what rpm is your WOT 1-2 shift point?

I will warm it up tonight and check the 1-2 shift point. I want to say it’s around 3,000 RPM. I installed a suncoast governor pressure solenoid and block in way back when, I’m not sure if the transmission shop reinstalled it or not. I haven’t been inside of it since I got it back from them five months ago. I also installed a new “high pressure” transducer, which I’m not sure if they reused, at the same time as the governor pressure solenoid. 

[Bfranz]

Trans shifts from 1-2 at around 2900 (I was spinning, it’s snowing pretty good here) governor pressure matches desired until it gets to around 85 psi and that’s all it’ll go

[Bfranz]

It appears as if all shifts at wot are completed at 3,000 RPM

[Dynamic]

Your TV cable is a little tight. Loosen it until WOT shifts occur at 2800 rpm and see if that changes anything (besides the shift point).

[Bfranz]

Alright, it seems as if the issue is fixed. I took it back to my transmission shop and they replaced the speed sensor (again) and the “external transmission harness” (from what I gathered he meant the speed sensor wiring harness). I will look in the future and report back which harness they replaced. Thank you guys for your support on this.