anyone else have an issue with your tiptronic transmission shifting from 5-4 then back again under moderate to heavy throttle?

 

It's your chip. The ECU has a hard time knowing what the loads are & it's hunting gears.

If you have Lemi, increase or decrease loads. If you increase, it will shift down & hold more, if you decrease it, 5th will hold.

Or you can either shift into 4th, or give it a little more gas slower. Shifting is also dependent on how fast you push down the pedal.

 

you think a tip chip would solve that or would I have to go with a full valve body upgrade?

 

I'm not sure but my car doesn't hunt gears at all. I'm very happy with it. It seams to hold gears more when you are on it.
In 5th I have to give it a lot of peddle to change gears. Mine only seams to **** when I want it to.
You can also VAG-Com the trans to hold 1st gear.

 

I noticed recently that my transmission will do the same.. when in TIP mode in 5th gear, if I accelerate hard it will auto shift down to 4th, then return to 5th when I let off. I never had this issue till recently, it bothers me....

 

It's suppose to do that when you hit the kick down. Even in TIP mode.

If you press the pedal down about 90%ish, that is WOT, if you go past that it hits the "kick down" & will shift.

You can see where the switch is on the gas pedal, so just get used to staying on throttle with out hitting the kick down.