My suburban has an intermitent quirk on take off at normal throttle pressure. It acts like it's still in high gear and has to get back to low. Usually like a 1-2 second deal but an unsettling quirk. Any opinions?

 

BTW, after that momentary quirk it shifts normally with no slippage or anything unusual.

 

Do you have a 1st gear selection? Does it act the same?

Do you feel it downshifting into first when coming to a stop?

How many miles and how's the fluid? black? red?

 

Have all gears manually. Truck has 160k. Fluid changed about 30k ago, still clean and red.

 

Now that I think about it. It's when I make a fast type stop and not a coast down stop. It will shift down on its own then. Quick stop it will occasionally do this no matter how long I'm at a light.

 

So slam it into 1st and then back to drive and see what happens.

Sounds more like a deceleration problem, not a 1 to 2 problem????

 

No, like I said. It's intermittent. I don't think beating on it is the answer. I see they have a kit with all new sensors on ebay. Maybe that's the next step.

 

Part 1 - How Can I Tell If My 4L60-E Transmission is BAD? (GM 4.3L, 5.0L, 5.7L)

 

There's a ton of stuff on youtube to watch for 4l60e 1-2 shift solenoid replacements...