Miho1269

Hello all, new to the forum. I am at my wit's end with this truck. Just picked it up a few weeks ago and like the title says it has started to intermittently shift hard in every gear. At first I thought it could possibly be the common problem with the 1-2 accumulator but I would think that only affects the 1-2 shift and not every shift. Also it only does it when the temp is over 160 degrees F. The truck is a 2011 Silverado crew with a 4.8 and 4 speed auto. Oh and shutting it off and letting it sit for about 15 minutes seems to bring it out of it for the first couple shifts up from a stop and then once it start shifting hard it stays that way until stopping for at least 15-20min. Hopefully this is enough information to get me headed in the right direction. Thanks again in advance.