Normally my truck shifts really hard throughout all the gears, and it goes into drive and reverse especially hard. After I got it tested for emissions, and passed, it somehow started shifting like it should; nice and smooth. But of course after the vehicle is turned off, and then back on, it starts shifting hard again. All the emission tester/worker did was test my gas cap, and plugged their machine into the OBDII and everything was good to go.

Could it be a computer problem? I'm not getting any engine lights or codes from it, though.

Oh and my truck has been in the shop for the past month and a half, and the battery was disconnected for almost the whole time, until about a week ago. Will the computer have to relearn stuff? Cause I'm not getting as good gas mileage as I was before the truck went in to the shop.

 

do you remember if your o/d light was flashing before you took it in? they might have cleared a code and that changed something

 

It was never flashing.

 

hmm that is strange...maybe its just a coincedence