Hello! I have a 2007 rear wheel drive only silverado. Just under 166,000 miles. It has a rough shift sometimes between 1 and 2 on both shifting up and down shifting. Automatic transmission. Last changed fluid around 110,000 curious if I need to look into a new transmission or if just a service will help.
You're right in the mileage range to need a transmission replacement. The GM's tend to go out between 140k - 160k or so.
Ford any better?
nope
Not even a little. American quality is down the toilet right now.
try the service first, but I don't think it'll help much
I noticed that it did it more in the cold. Would that have any effect on it?
oil gets thick when cold and don't flow as well. This slows down transmission operation until it gets warmed up.
No, that is the mileage frame when the transmission goes out.
It's fairly common at that mileage, but you know what ... it can still go like that for a long time.
There is a "fix" for this problem which is widely available all over the internet. I'll copy pasta one post I quickly found which does an ok job summarizing:
A banging 1-2 shift is a very simple repair and no, the transmission does not have to come down.
First, check for codes. If none are found do the following:
Drop the pan back down, remove the 1-2 accumulator housing and pull the piston. Check for a torn piston seal or broken spring, but moreso for a wobbled out piston hole, which is probably the culprit.
Now, if all these items are okay, the 1-2 check is bad (unlikely). This is where it starts to get dicey unless you've been into about a million of these things, because the valve body has to come down (you don't even wanna go there).
I think you're gonna find a bad 1-2 accumulator piston. Wish you would have hollared before you changed the oil because you could have repaired this thing in just 10 minutes.
Allan
I say "fix" in quotes, because even though your 1-2 shift might improve, it's a sign that your transmission is getting tired, and other problems may soon follow. Instead of investing the time/money to do this, you MIGHT consider a more drastic solution.
thanks everyone for the tips and answers!
An update the problem seems to have gone away. I haven’t done anything to the tranny at all and it doesn’t shift weird anymore. I was gonna wait to see if it got worse and sure enough it stopped
maybe it was the weather 😉