Trans is heavily performance built. Works fine. Last trip out, I went to put shifter in Park and the shifter feels like there's nothing there. Additionally, the trans is not in park. It'll roll. Will not start in Park. Have to go all the way to Low/1 position and move shifter one position at a time to neutral to get starter to engage....

What happened?

 

Almost sounds like the cable needs to be adjusted, or has broken, i know trailblazers have an issue with their cables. Have you tried manually engaging park with the shift lever and see what happens! next thing (after checking cable adjustment) would be to drop the pan and make sure it didnt come apart internally somehow.

 

Haven't crawled under it yet due to rain, but I can't manually engage Park. It hits and locks in every other detent in the range just not Park, and I have to start it in Neutral...

 

I meant pushing the shift lever forward with your hand under the truck.. sounds like a cable adjustment issue.

 

I figured. That's what I'll look at first. Hope I see something obvious. Cheap to fix would be good too as long as I can avoid removing the pan.

I know my emergency brakes need adjusting. That'll be a first.

 

Had a similar issue when i first swapped the 6l80 into my yukon, had to readjust the cable abouf 4 days after i finished everything up... been fine ever since. Cheap is always good and in most cases the best way... lol