Ok, I was driving my truck back to work today. Coming onto an onramp. I was going about 20MPH. Heard a clunk and then it was like I hit the brakes even though I didn't. Pulled over and looked underneath. Saw nothing. Got back in put it in gear and it was like the truck had the brakes on.
No place to turn around and get off the ramp and to a parking lot. I dropped it into 1st gear and gave it some gas. Getting up onto the highway, it shifted up to 2nd and then when it shifted to Drive it acted like the motor was bogged down. Pulled it back into 2nd and accelerated to get out of the way of traffic. Got to the next off ramp and shifted it back into drive. Same thing. Drove it a about 40MPH 2 miles back to my work. Got back to work and put it into reverse to back into a stall. Nothing. No reverse. Pulled into a stall forwards. The tranny was getting hot. Let everything cool down and went back out to investigate. It is not making any noise. Pull it into reverse and nothing. Park and Neural is ok.(Wheels lock in park and are free in neutral). Pull it into L and I have to rev it a little bit before it goes forward. Put it in second, same thing. Put it in drive and it will try to go if I rev it a little.
From my past experience of racing with C6 transmissions, I would say the reverse and drive band is either broken of worn out. This was common on my race car with a very high shift point(7400 rpm). Sometime when I would shift , it would either just snap the band or it would grab for just a bit then cut loose like I shifting into neutral. Always kept a spare band it the parts box.

Now the thing that throws me off is the shifter acts like it is binding up. Pull it down and it takes a little effort to move it from Park into Drive and visa versa. Never had a problem with that and the linkage is still tight and appears to work properly.
My question is, this sounds like the band to me but could it have any effect on the parking pawl inside the tranny? I wont have a chance to work on it for a few days, maybe even next week so I wont know what I will find until I have time to get the pan off and look.
Does anybody have any ideas if it could be anything else?

 

Sounds like something internal broke and is messing everything up. Good luck.....

 

X 2 on the internal issues and good luck. Very strange symptoms to me, I would say yes its broke, and hopefully just a rebuild and not new trans time.

Can't be that bad if you could do 40MPH 2 miles back to my work. At least ya got that much out of it.

 

Talked to tranny shop today. They said it is the high/reverse clutch went out.
They want $1000 to pull the tranny, rebuild it and reinstall it.
$700 if I pull and install it. I'm thinking for $300 they can fight it all.
Does this sound about right for a C6 rebuild?

 

Ouch, but at least for $300 you get a warranty, right?

Not to sure what sounds right, but that does sound pretty expensive.

Is that a total rebuild or just pull it out replace the high/reverse clutch and reinstall?

 

It is a total rebuild. They are going to pull it, rebuild it, install it and full warranty it for the $1000. It seemed a little high to me, but he comes highly recommended by a couple of my mudding buddies. He built the trannies for their mud trucks and they hold up good.

 

1500.00 is what I paid for my last pull, rebuild and reinstall.

 

Well since he has a trans rep, that should make you feel better.