06' CTT w/ Trans Valve Body problems?

[CTTinTO]

my otherwise super reliable 2006 CTT has finally started to show its true colors...

While on my way back from picking up my parents from the airport, I experienced some real hard (and I mean HARD) shifting from 3rd to 4th gear after downshifting from 6th to 3rd gear. It happened several times and I tried again on my way home and it continued to do it. In any other gear, even under WOT it shifts very smooth and normal through all gears. Just on the freeway when cruising in 6th and flooring the accel pedal to get it to downshift i experience the hard shift getting out of 3rd gear.

I guess my valve body is acting up? I was hoping that this was only a 04'-05' MY problem but I guess not.

Has anyone had any luck with changing the transmission oil and filter?

I have about 112,000kms now so I'm do for a trans fluid flush anyhow...

[RFM]

Unlikely that an oil change will help, although i think that in some cases when no error codes are present, which indicates an electrical/mechanical related issue, the problem can caused by a specific type of contamination inside the Tiptronic. There is always a new valve block, filter and oil change procedure performed according to the manufacturer's instructions. I do not know of anyone has experimented with a special cleaning action ATF oil additive.

[CTTinTO]

Unlikely that an oil change will help, although i think that in some cases when no error codes are present, which indicates an electrical/mechanical related issue, the problem can caused by a specific type of contamination inside the Tiptronic. There is always a new valve block, filter and oil change procedure performed according to the manufacturer's instructions. I do not know of anyone has experimented with a special cleaning action ATF oil additive.

thanks for the feedback... I drove my CTT again last night and could not duplicate the symptoms. Mind you, it was a fairly short trip so I suspect it may act up when it is hot. I will have to keep an eye on it and report back. I also left a message with a friend of mine who works at the local P dealer. Lets see what kind of recommendations he gives me.

[wvicary]

Have you checked for any transmission and engine codes?

[CTTinTO]

Have you checked for any transmission and engine codes?

The check engine light is not on and no other lights are on the dash either. I will have to scan it this weekend to see if there are any transmission codes.

My friend at the dealer told me that its 99.9% the valve body and is looking into the part cost for me.

I drove it again today and could not duplicate any symptoms so I think I will sit on this one a bit longer before spending $2k+ on a very intermittent problem.

[wvicary]

Record any faults code and clear, monitor to see if the problem/codes return then start the diagnostic tracing. Be sure to check for any CAN-BUS or charging system/battery faults.

[CTTinTO]

Record any faults code and clear, monitor to see if the problem/codes return then start the diagnostic tracing. Be sure to check for any CAN-BUS or charging system/battery faults.

thanks for the tips wvicary

[CTTinTO]

scanned for codes yesterday and nothing cam up...

on the good side, I haven't experienced the hard shifting since.

looks like the problem may be gone. for now.

[wvicary]

Hopefully it was a one time only thing. Perhaps just water migration into a connector that needed time to dry out.