starzky

Title says it all really. When I take the foot off the pedal around that speed it's bouncing approximately between ~925-1250 RPM. This also has been intermittent. At times it happens and others it may not. Truck has 99k miles. Towed 2-3k lbs a few times only. 75% city driving. Changed transmission fluid at 99k as well. To tell you the truth I can't say for certain how long this issue has been occurring. I'm pretty certain it's been some time, except it's since the trucks really approached the 100k mark that I've been really looking into the long-term problems that can arise with the truck, so I've been a lot more attentive with these smaller details. Is this in relation to the torque converter? Other than this I feel the truck's shifting has been just fine. I've installed the superior solutions kit, but as I've discovered, the 4.3 does not have an auxiliary cooler like the V8s do, so I'm installing a katech 170° thermostat to hopefully remedy the hot trans issue.