I was driving back from Philly this morning and went to accelerate a bit, when the truck went to downshift, I felt a clunk/bang..it happened a few times, then the check engine light came on and the tranny stayed in 4th gear. I pulled the codes and came up with p0700(Transmission Control Malfunction),P0734(incorrect 4th gear ratio),and P0735(incorrect 5th gear ratio). I dropped it at the dealers today, since I cant really look anymore into the problem, and now just have to wait til Monday to find out what the problem is. The service advisor said that Modules/Sensors are common problems on these transmissions. Hopefully that is all it will be, but with my luck It may need a new tranny...lol...
I had this happen to me, but not the rest. I believe there was a TSB for a tranny filter change (or something like that).
Same thing though, I went to accelerate a bit just as the truck was downshifting and heard a clunk. It then was very hesitant to shift up and would idle higher than normal.
I took mine in to the dealership and after 2 hours of whatever the hell they were doing they said they needed more time and I couldn't that day, so they just put everything back together, cleared the CEL and on my way I went. It drove perfectly normal ever since I drove it off the lot, so I never went back.
^ after I cleared the codes, it worked fine for a bit, leading me to believe it is electrical versus mechanical.....I just have to wait and hear from them today...
That's what I think mine was as well, it was like nothing had ever happened once the codes were cleared. In my own words, I think it just got bugged up and needed a restart, lol.
I called them, but as of 2:00, they havent pulled it in the shop yet. They have a night shift too, so the service manager said that shift would check it out.....
Just called the dealer...the problem was diagnosed as a faulty valve body and selenoids..Good news is it is covered under powertrain warranty, I just have to pay $100 deductible..I am happy considering I thought my warranty was up(62,000 miles) and was figuring on a hefty bill....Should have the truck back tomorrow afternoon....
*Update* I got a call from the dealer last night. They still had problems after installing the new valve body, so they ordered a second one thinking it was faulty too, after trying to install te second new valve body, they figured out that the valve body was not seating properly because of a small snap ring in the way. They now have to remove the transmission and disassemble to find out where the snap ring came from....Lucky me...lol...
*UPDATE* Dealer called and said the tranny needs to be rebuilt.. They need to get parts (clutch packs,selenoids,etc) and now the truck wont be done til Thursday or Friday...I miss it already...