So the recent snow in MI made me use my 4HI. Everything was fine for a day then today I went to make a I Turn and heard a loud clunk noise. I tried to give it gas but it just revved.
Put is reversed just revved.

The truck drives fine in "1" an "2" but no "3" or Drive or reverse. Put it back in 2WD same thing. Truck won't go in 4wd low. It tries to but won't engage. I put the truck in reverse and it feels like it engages but revs and seems like it tries to go forward but won't move

Drive is just dead as well as "3"

Truck is an 05 Z71 5.3 ECSB 130,000 miles trans has never been rebuilt..
Sorry for the vague scattered info I'm about to get on a plane just trying to get some info while I'm in the air.
Thanks everyone in advance this site is great.

 

Opinions, theories, thoughts, questions would be much appreciated.
I hate sending it to a tranny shop just to have them tell me the tranny is bad and it isnt. Im not big on Transmissions. If it is the tranny ill replace it with an FLT myself.

 

Sounds like the trans took a dump

 

Thanks. Im leaning that way too. Just had to leave in such a hurry yesterday didnt have time to look at it. Im kinda hoping it is then I can swap it for an FLT.

 

anyone else?