2007 yukon gears seems striped or transmisson prob. only 72000 mi

From what you are describing, it is possible either the 3-4 actuator is no longer playing with the 3rd & 4th clutch packs, only way to know for certain is to hook up the good ol' pressure gauge to trans. system, yeah, you think the Chevrolet dealer should know this right?

Sell it now if you can!
Smiles

this is probably a bad u-joint(s) crawl under the truck engine off and in park and on a flat spot, twist the drive shaft if it clunks at all or has some up down or left right slop the joints are shot and will need replacing. And yes the u-joints will cause a drive line vibration that seems like a transmission issue it goes away with speed as the shaft will spin fast enough the vibration will become only a hum.

I have a similar problem with mi Jetta 2010, I when the last week to the dealer and they didn't find anything bad, but the problem still hapenning.

You can put the shifter in 2, 3, or overdrive. It will still start in first and shift up to whatever gear you have selected. Try it, you wont damage anythingl

take all wheels off the ground use jack stand,start engine up and put car in drive and let it run for about 5 mins, with wheel off the ground it should shift gears better, if it do you to change your transmission filter and oil, VERY IMPORTANT TO CHANGE OIL WHILE IT IS HOT! check oil to make sure no metal is in oil or heavy shavings, if shavings or metal is present you need new tranny,measure the amount of oil you take out put same amount back in, i really dont think you got a speed sensor problem you might have too much milage on your yukon, hay mon sure you service your yukon on time or else ford will excort you home, good luck mon and big up u self

It will take off from a stop in overdrive but as soon as it shifts into 3rd at about 30 miles per hour it jumps into neutral? If yes, you have a burnt 3/4 clutch. The transmission will need rebulit. Cost of about 1600 dollars.

2nd or 3rd not drive or low. higher the gear less wheel spin. good luck . joeyj35@live

sound like shift valves sticking in valve body.

Check you linkage, go under your car and shifter by hand( with tool) at the trans. to first gear.and drive in first gear.

check the detent balls in the gear box also check simple things like mounts and clutch adjustment