i own a 05 Tahoe, 2wd, 4.8L with the 4L60E tranny. the other day while getting up to speed getting on the freeway it wouldnt shift from 3rd to 4th. i had to drive for 2 miles around 5k rpm trying not to be too slow for merging as the speed limit is 75 there. i parked it and had a friend tow it to his place. 2 days later i was trying to show him what it was doing and now when it shifts from 2nd-3rd its like it shifts out of 2nd but not into 3rd and the rpm just jump up but no power. i have never had any trouble or signs of problems at any point before these 2 things happened. fluid seems to be ok level and is still amber or redish in color. while looking around i did notice a hose hanging at the end of the tranny headed towards the rear that wasnt there before. i cant tell where it comes from oir where it goes or is supposed to go but i know it wasnt there last time i was under my tahoe. please help with any thoughts or advice as i cant afford a new tranny right now and need my vehicle to get work.

 

Hi

Sorry to report that I had the same issue with my 2006. Turns out the 3rd and 4th gear clutch packs were bad. I had to get a new (rebuilt) trans.

 

it's possibly could be that the fluid and filter needs changing ! the filter could be starting to clog up ! the hose, I have no idea where it came from but try changing the fluid and filter first !

 

Ok thats pretty much what im getting told here also. going to flush and replace the tranny fluid, change oil and filter and see if that does anything. if not i've located a couple used tranny's up in phoenix(about 100 miles away) for around $350-$450. tranks for for help and advice