Ok, So I live in Minnesota, and when the temp is below 15 degrees and the Jimmy has been sitting over night, if I do not have time to let the truck warm up first thing in the morning, and I start to drive, the RPM's get pretty high before it shifts into 2nd, once it initially gets into 2nd, everything is fine and back to normal (meaning, I can stop at a stop sign, or a stop light, start driving and it flawlessly shifts through the gears, to the point where i can barely feel it.

And any point through the day when the truck is started, it shifts flawlessly. It is just on super cold mornings when I do not let it warm up for like 5-10 minutes.

Am I right to assume that it is just because it is cold? I checked the fluid, the level is good, the fluid is fairly clean, does not smell burnt.

 

the fluid in your trans isn't warming up soon enought that might be your issue is a lack of preassure might be your issue.

 

Thanks, That is what I was thinking.
I keep it parked outside, I have only noticed it really do it 2 times, and those 2 times the temp was between 8-10° with the windchill around -4°

 

I may be incorrect about this but I believe that when your transmission is cold the computer commands it to slip a little bit to help warm up the fluid. My '94 Blazer does the same thing.

 

I read that while searching up the 4l60e as well.
Thanks for the response!

 

You're very welcome. I replaced the 4L60E in my wife's '93 Jimmy last year and I learned a LOT about them.