Hey guys thanks in advance for your help. I have a 2003 Yukon all stock. This vehicle is new to me and I noticed when i bought it that the rpm's would spike quickly about 1000 rpm's when it was shifting between gears. It was just a quick spike but it seamed like it did it in every gear change. I have rebuilt 350 turbos and 4l60E just the basic clutch seals and bushing but I do not pretend to know how they work if you guys have any suggestions feel free to let me know as soon as I get tags on it I will make a video of the rpm cluster during shifts...

 

Anyone have any ideas....