07 Tahoe Trans issue

[Bedhead514]

I've got a 2007 Tahoe 2wd with 240,000 miles that i've owned for 8.5 years. Truck has been awesome with very little issue. Starting late last week, the transmission started shifting different than I've grown accustomed to. From a stand-still, the first shift of the trans was normally around 1500rpms at moderate throttle pressure. The new first shift seems to be around 2500rpms. The fluid was a little low and topped off a few days ago using the hot temp mark on the dipstick. No check engine light or other warnings have popped up on the dash.

Anyone ever had this happen? Could this be a programming issue, a heads up of a failing trans or something in between?

 

[Marky Dissod]

Ever play Gauntlet or Gauntlet II? Can you picture the announcer's voice that spoke to the players ...
'4L60E, your life force is running out!'

 

[Joseph Garcia]

Your torque converter or the transmission itself is probably on the way out, as stated above. Get it checked out ASAP at the dealer or a transmission shop or a local repair shop with solid transmission experience. If it's the torque converter, and you caught it before it grenades and takes out your transmission, than you are lucky, and just replace the torque converter.

 

[Marky Dissod]

Since it's a 4L60E (I THINK), it's unfortunately far more likely to be the 4L60E itself.
Changing out the ATF will give you a good idea of how your 4L60E is doing, and may even give it a lil more time, if it's not already too late ...