tweeder

iTrader: (3)

Is it possible to have a misfire just in overdrive? I just had a new tranny built and driving home it really runs rough but only in overdrive even doing 60 kms when its in overdrive (cags crap). If I kick it down or drive in 3rd then I don't notice it. The tranny builder thinks its a misfire, so I daid i'll look into it and if not he said to bring it back. I still have to hook up the scanner and see but I don't have time untill the middle of the week.

tweeder

iTrader: (3)

Anybody?

Dewey

iTrader: (1)

i'm pretty sure that's not possible, but i've been wrong about this kind of thing before

tweeder

iTrader: (3)

Thats my understanding too.

03 BLACKOUTSSS

iTrader: (3)

If it was fine when you brought it in, and now there is a problem, I have to think that the shop did something. I don't know much about transmissions, or what could have gone wrong mechanically to make you feel like you have a misfire, but if its not throwing codes, then I bet its in the tranny.

Dewey

iTrader: (1)

stupid question - did they pull the motor out the top to put in the new tranny?
they may have damaged a part of your fuel ignition system (plugs, wires, coils, etc)

tweeder

iTrader: (3)

Nope the did the tranny from the bottom.

Dewey

iTrader: (1)

never mind then. have you checked you plugs and wires to see if it's coincidence and have you actually checked for trouble codes?

budhayes3

iTrader: (19)

I don't see how you'd have a misfire only in overdrive...I could see only under load or something like that. Maybe your torque converter is locking and unlocking? Did you put a higher stall converter in there? I believe that irratic tcc operation may occur if not tuned for it.

tweeder

iTrader: (3)

Turned out to be a bad coil that would really act up under load. Changed it and now all's good