I've got about 95k on my engine/trans and this just started happening... when the car is in low-rpm's (under 1500) in 3rd or OD and I give it some gas the car jolts as if it wants to shift but it doesn't. If I lean into the pedal a bit more it finally shifts and it's on its way. I plan on doing the full-boat J-Mod sometime soon. Will that help? All the fluids are fine. Also with the J-mod can you shift like a "manumatic" without breaking other things?