Why does my trans shift in TIP mode?

[rollerton]

Ok. So I have a decent understanding of how the trans works, etc etc.. yeah yeah, it's an auto and it sucks. I have owned a few C5 TIP cars, and typically convert them to 01E. But they do not do this. FWIW it's not just an anomaly or situational, I can replicate this at any time also.
Putting down the road in TIP mode, 3rd gear. Come to a cross street and with no traffic I just head around the corner, at lets say 35mph. No racing or anything, normal throttle. Obviously I slow and the engine starts to bog a little.
It's a 1.8 so it has the torque of a one legged pigeon. RPM's drop a little from around 3k to 2k or so typically, then a little throttle, RPM's climb to about 2700 and the FUCKING THING SHIFTS. I watch the tach go from 2700 -2900 and DROP down to about 2k.
Gear indicator indicates NO SHIFT. VCDS indicates NO SHIFT. But my foot on the throttle and the tach say the god damned thing is shifting to a higher gear for no reason at all.
Trans module coding doesn't matter, it does this regardless.
Do they ALL do this? It's total bullshit.

[diagnosticator]

Because the TCU is coded for New Shift Strategy. You need to recode the TCU for Old Tip strategy to stop the auto shifts in tip mode. Coding is 001102 for new strategy, and 001002 for Old strategy.

[rollerton]

I have done it! I changed the coding 4 different ways yesterday and it still does this. At least I'm pretty sure a combination of several of the codings I tried yesterday was Old strategy. Other than the hold 1st gear and downshift to 1st it didn't change anything.
I think the closest I came to it letting me shift without HELPING was 0000002. It's pretty ridiculous that it doesn't indicate a shift in any way at all, not even in the trans module, but it shifts. And beyond that it shifts UP to a more USELESS gear. 2200rpm on a 1.8 is stupid and absolutely useless.

[Gin+]

I haven't noticed this behavior with my 2004. Not saying you're mistaken but what you describe sounds more like torque converter lockup.

[rollerton]

Verified my TCU coding is 0001002 and it SHIFTS while in tip mode. Not much, and only under certain circumstances. But it is NOT TC lockup. The RPM obviously drops from just under 3k to about 2k exactly the way it does when it is in D. Exactly.
But again, only when you lug the engine a little, constant throttle like I've described.

It's very very stupid.

[rollerton]

Alrghty. Here's a short little clip, best I can do holding the camera and driving in traffic and turning and the stuff.
In TIP mode, watch the TACH drop rpm at about 5-6 seconds and explain that to me. Trans coding is irrelevant to this little thing it does and it only seems to do it while turning as far as I can find. That is CONSTANT throttle, all I do is turn a corner and continue on and it shifts but there is no evidence anywhere indicating a gear change.
Anyone else ever noticed this?

I wanna drive this thing off a cliff now. Bugs the shit out of me.

[diagnosticator]

Looks like TCC lock up to me. It does the same thing in D feels like an extra gear shift. You can view the TCC status while driving with VCDS.

[chad99]

I tested my auto and it does the same thing, I think its really the TC and not a real shift, I thought it was weird at first but it doesn't bother me.