Ok... so here's the issue. This morning, while at a stop light (while in "D").. i tried to take off.... and it wouldn't go anywhere. Just sit there and rev. However, when I shifted it all the way down to "1st"... I would feel it shift and then it would go. Proceed to 2nd... then to 3rd... and then it would shift to "D".

Next light... same issue.

Checked fluid... everything seems fine. ANY ideas?
(before I call up a shop and have them rape me over this).

05 Sierra, 2wd, 102,xxx. No longer lowered... back to stock height. It'll go into R, 1, 2, 3, D (everything) just fine... but it just wont take off from a light while in Drive.

 

i dont know, but 2 weeks ago, mine made a clunk/metal sound i lost R, 2nd and 4th.

i feel your pain

 

forward sprag asssembly is what it ended up being btw...