I rebuilt a C-6 last month with all new clutches, steels, seals, bushings, new rigid band, new pump and stator, Sonnex R servo, E lever, new hardened input shaft, new heavy duty 17 roller sprag from Broader Performance, fully rollerized it, 4 pinion planetaries, new Frank Merkl valvebody, and all clearences were done to Frank Merkl's specs. The PTC torque converter was basically new. It had maybe 10 passes on it from previous transmission. After installing the trans I went through the gears in the yard (simulating a burnout)just to make sure everything was working and no leaks. Went to the track today and drove around the pits going through the gears and all was fine. First pass car wanted to go left so had to abort run. Got back to pits and trans fluid was all over the side of trans. It was coming out of the vent on the passenger side of trans. I figured I over filled it. I put 10 quarts in when I filled it up. The 8 inch converter already had fluid in it so I thought I put to much. I drained about a quart out and figured I was good. Pulled to the line, did burn out through all 3 gears and when I let off the gas the car shut off. Fired it back up and the car will not move in any gear. No reverse or forward gears. I have been beating up C-6's for 20 years and never had one do this. I will go investigate more tomorrow. I just can't see draining 1 quart causing this if it was acting like it was over filled and blowing fluid out the vent.
Any help or suggestions appreciated
This message has been edited by cwebb1970 from IP address 126.96.36.199 on Jun 10, 2012 3:22 PM This message has been edited by cwebb1970 from IP address 188.8.131.52 on Jun 10, 2012 1:59 PM
So hopefully you've figured it out by now but here are some diagnostic steps:
1) No power = no fluid pressure. This comes from low fluid (really low), screwed pump, or a busted pressure regulator circuit in the valve body (loose valve body, loose pickup?). Could be a screwed converter as well that is not allowing input power to flow to the input shaft. That comes from a fried sprag/one-way in the converter.
2) No forward = no forward clutch. You don't have forward or reverse so this is unlikely.
3) No reverse = no rev-high clutch. This would only show up in reverse or high. Again, unlikely you have two problems stacked up so it's back to #1 above.
I hope some of the pros help out because this has to be very frustrating.
While it is apart again verify the full mark on the dipstick, then when it shows full you know it is , no way of guessing will get an accurate fluid level.
Be intersted to see what you find . What you did is a proven build .
Found problem. The pump gears are both broken in about 12 pieces. Converter seems fine other than a little gauling on the end of the snout. I am going to send it back to PTC and have it checked out to be sure. This is a first for me. I have never had a problem with a pump in a C6 in 20 years. I guess my luck had to run out sometime.
This message has been edited by cwebb1970 from IP address 184.108.40.206 on Jun 13, 2012 6:25 PM