Auto trans problem when cold 99 wrangler

[atreasure]

I have a 1999 wrangler with an automatic trans that seems to have problems shifting only when the vehicle is cold. I have changed the trans fluid, and that didn't help. As soon as the weather changes and is warm, the problem goes away until fall. Any ideas????

[fredjacksonsan]

If you've got high mileage, you might have some gunk in the valve body (the thing you can see when you take off the pan). A good cleaning may take care of it (and can't hurt). You may also want to look into a shift kit for it, as there are springs that weaken over time. I had an auto trans vehicle once that didn't want to shift 1-2 and 2-1, put in a shift kit and it shifted like a dream after than.